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![1/4″ x 3/8″ Barbed Adapter — Spa & Hot Tub Replacement Part
Find the exact barbed adapter your hot tub needs, fast. The 1/4″ x 3/8″ Barbed Adapter is a small but essential plumbing fitting used across a wide range of spa and hot tub models. Whether you're reconnecting an air line, replacing a worn fitting, or restoring your ozonator connection, this is the part that gets your tub back up and running.
Shop and order at Western Tub and Pool.
? [1-855-248-0777] | ✉️ [fixmytub@gmail.com]
What Is the 1/4″ x 3/8″ Barbed Adapter?
This barbed reducer adapter connects 1/4″ vinyl tubing to 3/8″ vinyl hose — or vice versa — creating a reliable, leak-resistant junction in your spa's plumbing system. It is commonly used in air line systems, ozonator connections, and various pump-side plumbing configurations across many hot tub brands and models.
SKU: SPA/WW672-4350
Also known as: Barb Adapter 1/4″ x 3/8″ | PVC Tubing Reducer 3/8″ Barb x 1/4″ Barb | Barbed Fitting 1/4″ MPT x 3/8″ Barb
Product Specifications
Specification
Details
Part Name
1/4″ x 3/8″ Barbed Adapter
SKU / Part Number
SPA/WW672-4350
Thread Type
1/4″ MPT (Male Pipe Thread) x 3/8″ Barb
Shipping Dimensions
1.5″ x 0.78″ x 0.78″
Shipping Weight
0.05 lbs
Material
PVC / Plastic
Application
Connects 1/4″ and 3/8″ vinyl tubing in spa plumbing systems
Compatible Hot Tubs, Spas & Models
This adapter is a widely used spa plumbing component that fits many hot tub brands and models. Known compatible applications include:
Jacuzzi — J-300 Series Pumps
Strong Spas — Various models using WW672-4350 specification
Waterway Plastics — Systems using RF850 barb adapter fittings
Many additional spa and hot tub brands using standard 1/4″ x 3/8″ barbed plumbing connections
Not sure if this is the right part for your tub? Don't guess — call us at 1-855-248-0777 or email fixmytub@gmail.com with your hot tub's make, model, and serial number, and our team will confirm compatibility before you order.
Common Uses for This Part
Connecting ozonator tubing to air line plumbing
Reducing or expanding between 1/4″ and 3/8″ vinyl hose runs
Replacing cracked, brittle, or leaking barbed fittings in pump assemblies
Repairing air injection and hydrotherapy jet plumbing systems
Frequently Asked Questions
What does a 1/4″ x 3/8″ barbed adapter do?
It creates a secure, barbed connection between two different-sized vinyl tubes — one measuring 1/4″ and the other 3/8″. The barbed design grips the inside of the tubing to prevent slipping or leaking under normal spa operating pressure.
How do I know if this is the right size for my hot tub?
Check the tubing currently connected to the fitting you need to replace. If one side is 1/4″ tubing and the other is 3/8″ tubing, this is your part. If you're unsure, send us a photo of the existing fitting along with your hot tub's make, model, and serial number at fixmytub@gmail.com.
Is this a hard-to-find part?
It can be. Many older or discontinued spa models still rely on these fittings, and they're not always easy to source locally. Western Tub and Pool specializes in exactly these kinds of hard-to-find replacement parts — give us a call and we'll help you track down what you need.
What is the part number for this adapter?
The SKU is SPA/WW672-4350. Cross-reference part numbers include RF850 (Waterway Plastics) and barb25x38.
Can I order by phone or email?
Absolutely. Call us at 1-855-248-0777 or send your order and inquiries to fixmytub@gmail.com. Our team is happy to assist with part identification, compatibility checks, and orders.
Do you offer assistance identifying other replacement parts?
Yes. If you're not sure what part you need, send us an email with a photo of the part, along with your hot tub's make, model, and serial number. We'll help you identify the right replacement.
Can't Find the Right Part? We Can Help.
Western Tub and Pool specializes in hard-to-find hot tub and spa replacement parts. If you're not sure which part you need, don't worry — our team is here to help you get it right the first time.
Here's how to get assistance:
Check your part number if known
Take a photo of the existing part and its surrounding plumbing
Note your hot tub's make, model, and serial number
Send everything to fixmytub@gmail.com — we'll take it from there
Shop and Order at Western Tub and Pool
? Call us: 1-855-248-0777
✉️ Email us: fixmytub@gmail.com
Browse our full online catalogue for more spa parts, hot tub components, and repair accessories. From common fittings to discontinued parts, Western Tub and Pool is your go-to source for hot tub repairs done right.](https://cdn11.bigcommerce.com/s-b7yzllubsu/images/stencil/1280x1280/products/4199/6240/SPA-WW672-4350__21903.1773434048.jpg?c=2 "1/4″ x 3/8″ Barbed Adapter — Spa & Hot Tub Replacement Part
Find the exact barbed adapter your hot tub needs, fast. The 1/4″ x 3/8″ Barbed Adapter is a small but essential plumbing fitting used across a wide range of spa and hot tub models. Whether you're reconnecting an air line, replacing a worn fitting, or restoring your ozonator connection, this is the part that gets your tub back up and running.
Shop and order at Western Tub and Pool.
? [1-855-248-0777] | ✉️ [fixmytub@gmail.com]
What Is the 1/4″ x 3/8″ Barbed Adapter?
This barbed reducer adapter connects 1/4″ vinyl tubing to 3/8″ vinyl hose — or vice versa — creating a reliable, leak-resistant junction in your spa's plumbing system. It is commonly used in air line systems, ozonator connections, and various pump-side plumbing configurations across many hot tub brands and models.
SKU: SPA/WW672-4350
Also known as: Barb Adapter 1/4″ x 3/8″ | PVC Tubing Reducer 3/8″ Barb x 1/4″ Barb | Barbed Fitting 1/4″ MPT x 3/8″ Barb
Product Specifications
Specification
Details
Part Name
1/4″ x 3/8″ Barbed Adapter
SKU / Part Number
SPA/WW672-4350
Thread Type
1/4″ MPT (Male Pipe Thread) x 3/8″ Barb
Shipping Dimensions
1.5″ x 0.78″ x 0.78″
Shipping Weight
0.05 lbs
Material
PVC / Plastic
Application
Connects 1/4″ and 3/8″ vinyl tubing in spa plumbing systems
Compatible Hot Tubs, Spas & Models
This adapter is a widely used spa plumbing component that fits many hot tub brands and models. Known compatible applications include:
Jacuzzi — J-300 Series Pumps
Strong Spas — Various models using WW672-4350 specification
Waterway Plastics — Systems using RF850 barb adapter fittings
Many additional spa and hot tub brands using standard 1/4″ x 3/8″ barbed plumbing connections
Not sure if this is the right part for your tub? Don't guess — call us at 1-855-248-0777 or email fixmytub@gmail.com with your hot tub's make, model, and serial number, and our team will confirm compatibility before you order.
Common Uses for This Part
Connecting ozonator tubing to air line plumbing
Reducing or expanding between 1/4″ and 3/8″ vinyl hose runs
Replacing cracked, brittle, or leaking barbed fittings in pump assemblies
Repairing air injection and hydrotherapy jet plumbing systems
Frequently Asked Questions
What does a 1/4″ x 3/8″ barbed adapter do?
It creates a secure, barbed connection between two different-sized vinyl tubes — one measuring 1/4″ and the other 3/8″. The barbed design grips the inside of the tubing to prevent slipping or leaking under normal spa operating pressure.
How do I know if this is the right size for my hot tub?
Check the tubing currently connected to the fitting you need to replace. If one side is 1/4″ tubing and the other is 3/8″ tubing, this is your part. If you're unsure, send us a photo of the existing fitting along with your hot tub's make, model, and serial number at fixmytub@gmail.com.
Is this a hard-to-find part?
It can be. Many older or discontinued spa models still rely on these fittings, and they're not always easy to source locally. Western Tub and Pool specializes in exactly these kinds of hard-to-find replacement parts — give us a call and we'll help you track down what you need.
What is the part number for this adapter?
The SKU is SPA/WW672-4350. Cross-reference part numbers include RF850 (Waterway Plastics) and barb25x38.
Can I order by phone or email?
Absolutely. Call us at 1-855-248-0777 or send your order and inquiries to fixmytub@gmail.com. Our team is happy to assist with part identification, compatibility checks, and orders.
Do you offer assistance identifying other replacement parts?
Yes. If you're not sure what part you need, send us an email with a photo of the part, along with your hot tub's make, model, and serial number. We'll help you identify the right replacement.
Can't Find the Right Part? We Can Help.
Western Tub and Pool specializes in hard-to-find hot tub and spa replacement parts. If you're not sure which part you need, don't worry — our team is here to help you get it right the first time.
Here's how to get assistance:
Check your part number if known
Take a photo of the existing part and its surrounding plumbing
Note your hot tub's make, model, and serial number
Send everything to fixmytub@gmail.com — we'll take it from there
Shop and Order at Western Tub and Pool
? Call us: 1-855-248-0777
✉️ Email us: fixmytub@gmail.com
Browse our full online catalogue for more spa parts, hot tub components, and repair accessories. From common fittings to discontinued parts, Western Tub and Pool is your go-to source for hot tub repairs done right.")
![1/4″ x 3/8″ Barbed Adapter — Spa & Hot Tub Replacement Part
Find the exact barbed adapter your hot tub needs, fast. The 1/4″ x 3/8″ Barbed Adapter is a small but essential plumbing fitting used across a wide range of spa and hot tub models. Whether you're reconnecting an air line, replacing a worn fitting, or restoring your ozonator connection, this is the part that gets your tub back up and running.
Shop and order at Western Tub and Pool.
? [1-855-248-0777] | ✉️ [fixmytub@gmail.com]
What Is the 1/4″ x 3/8″ Barbed Adapter?
This barbed reducer adapter connects 1/4″ vinyl tubing to 3/8″ vinyl hose — or vice versa — creating a reliable, leak-resistant junction in your spa's plumbing system. It is commonly used in air line systems, ozonator connections, and various pump-side plumbing configurations across many hot tub brands and models.
SKU: SPA/WW672-4350
Also known as: Barb Adapter 1/4″ x 3/8″ | PVC Tubing Reducer 3/8″ Barb x 1/4″ Barb | Barbed Fitting 1/4″ MPT x 3/8″ Barb
Product Specifications
Specification
Details
Part Name
1/4″ x 3/8″ Barbed Adapter
SKU / Part Number
SPA/WW672-4350
Thread Type
1/4″ MPT (Male Pipe Thread) x 3/8″ Barb
Shipping Dimensions
1.5″ x 0.78″ x 0.78″
Shipping Weight
0.05 lbs
Material
PVC / Plastic
Application
Connects 1/4″ and 3/8″ vinyl tubing in spa plumbing systems
Compatible Hot Tubs, Spas & Models
This adapter is a widely used spa plumbing component that fits many hot tub brands and models. Known compatible applications include:
Jacuzzi — J-300 Series Pumps
Strong Spas — Various models using WW672-4350 specification
Waterway Plastics — Systems using RF850 barb adapter fittings
Many additional spa and hot tub brands using standard 1/4″ x 3/8″ barbed plumbing connections
Not sure if this is the right part for your tub? Don't guess — call us at 1-855-248-0777 or email fixmytub@gmail.com with your hot tub's make, model, and serial number, and our team will confirm compatibility before you order.
Common Uses for This Part
Connecting ozonator tubing to air line plumbing
Reducing or expanding between 1/4″ and 3/8″ vinyl hose runs
Replacing cracked, brittle, or leaking barbed fittings in pump assemblies
Repairing air injection and hydrotherapy jet plumbing systems
Frequently Asked Questions
What does a 1/4″ x 3/8″ barbed adapter do?
It creates a secure, barbed connection between two different-sized vinyl tubes — one measuring 1/4″ and the other 3/8″. The barbed design grips the inside of the tubing to prevent slipping or leaking under normal spa operating pressure.
How do I know if this is the right size for my hot tub?
Check the tubing currently connected to the fitting you need to replace. If one side is 1/4″ tubing and the other is 3/8″ tubing, this is your part. If you're unsure, send us a photo of the existing fitting along with your hot tub's make, model, and serial number at fixmytub@gmail.com.
Is this a hard-to-find part?
It can be. Many older or discontinued spa models still rely on these fittings, and they're not always easy to source locally. Western Tub and Pool specializes in exactly these kinds of hard-to-find replacement parts — give us a call and we'll help you track down what you need.
What is the part number for this adapter?
The SKU is SPA/WW672-4350. Cross-reference part numbers include RF850 (Waterway Plastics) and barb25x38.
Can I order by phone or email?
Absolutely. Call us at 1-855-248-0777 or send your order and inquiries to fixmytub@gmail.com. Our team is happy to assist with part identification, compatibility checks, and orders.
Do you offer assistance identifying other replacement parts?
Yes. If you're not sure what part you need, send us an email with a photo of the part, along with your hot tub's make, model, and serial number. We'll help you identify the right replacement.
Can't Find the Right Part? We Can Help.
Western Tub and Pool specializes in hard-to-find hot tub and spa replacement parts. If you're not sure which part you need, don't worry — our team is here to help you get it right the first time.
Here's how to get assistance:
Check your part number if known
Take a photo of the existing part and its surrounding plumbing
Note your hot tub's make, model, and serial number
Send everything to fixmytub@gmail.com — we'll take it from there
Shop and Order at Western Tub and Pool
? Call us: 1-855-248-0777
✉️ Email us: fixmytub@gmail.com
Browse our full online catalogue for more spa parts, hot tub components, and repair accessories. From common fittings to discontinued parts, Western Tub and Pool is your go-to source for hot tub repairs done right.](https://cdn11.bigcommerce.com/s-b7yzllubsu/images/stencil/100x100/products/4199/6240/SPA-WW672-4350__21903.1773434048.jpg?c=2 "1/4″ x 3/8″ Barbed Adapter — Spa & Hot Tub Replacement Part
Find the exact barbed adapter your hot tub needs, fast. The 1/4″ x 3/8″ Barbed Adapter is a small but essential plumbing fitting used across a wide range of spa and hot tub models. Whether you're reconnecting an air line, replacing a worn fitting, or restoring your ozonator connection, this is the part that gets your tub back up and running.
Shop and order at Western Tub and Pool.
? [1-855-248-0777] | ✉️ [fixmytub@gmail.com]
What Is the 1/4″ x 3/8″ Barbed Adapter?
This barbed reducer adapter connects 1/4″ vinyl tubing to 3/8″ vinyl hose — or vice versa — creating a reliable, leak-resistant junction in your spa's plumbing system. It is commonly used in air line systems, ozonator connections, and various pump-side plumbing configurations across many hot tub brands and models.
SKU: SPA/WW672-4350
Also known as: Barb Adapter 1/4″ x 3/8″ | PVC Tubing Reducer 3/8″ Barb x 1/4″ Barb | Barbed Fitting 1/4″ MPT x 3/8″ Barb
Product Specifications
Specification
Details
Part Name
1/4″ x 3/8″ Barbed Adapter
SKU / Part Number
SPA/WW672-4350
Thread Type
1/4″ MPT (Male Pipe Thread) x 3/8″ Barb
Shipping Dimensions
1.5″ x 0.78″ x 0.78″
Shipping Weight
0.05 lbs
Material
PVC / Plastic
Application
Connects 1/4″ and 3/8″ vinyl tubing in spa plumbing systems
Compatible Hot Tubs, Spas & Models
This adapter is a widely used spa plumbing component that fits many hot tub brands and models. Known compatible applications include:
Jacuzzi — J-300 Series Pumps
Strong Spas — Various models using WW672-4350 specification
Waterway Plastics — Systems using RF850 barb adapter fittings
Many additional spa and hot tub brands using standard 1/4″ x 3/8″ barbed plumbing connections
Not sure if this is the right part for your tub? Don't guess — call us at 1-855-248-0777 or email fixmytub@gmail.com with your hot tub's make, model, and serial number, and our team will confirm compatibility before you order.
Common Uses for This Part
Connecting ozonator tubing to air line plumbing
Reducing or expanding between 1/4″ and 3/8″ vinyl hose runs
Replacing cracked, brittle, or leaking barbed fittings in pump assemblies
Repairing air injection and hydrotherapy jet plumbing systems
Frequently Asked Questions
What does a 1/4″ x 3/8″ barbed adapter do?
It creates a secure, barbed connection between two different-sized vinyl tubes — one measuring 1/4″ and the other 3/8″. The barbed design grips the inside of the tubing to prevent slipping or leaking under normal spa operating pressure.
How do I know if this is the right size for my hot tub?
Check the tubing currently connected to the fitting you need to replace. If one side is 1/4″ tubing and the other is 3/8″ tubing, this is your part. If you're unsure, send us a photo of the existing fitting along with your hot tub's make, model, and serial number at fixmytub@gmail.com.
Is this a hard-to-find part?
It can be. Many older or discontinued spa models still rely on these fittings, and they're not always easy to source locally. Western Tub and Pool specializes in exactly these kinds of hard-to-find replacement parts — give us a call and we'll help you track down what you need.
What is the part number for this adapter?
The SKU is SPA/WW672-4350. Cross-reference part numbers include RF850 (Waterway Plastics) and barb25x38.
Can I order by phone or email?
Absolutely. Call us at 1-855-248-0777 or send your order and inquiries to fixmytub@gmail.com. Our team is happy to assist with part identification, compatibility checks, and orders.
Do you offer assistance identifying other replacement parts?
Yes. If you're not sure what part you need, send us an email with a photo of the part, along with your hot tub's make, model, and serial number. We'll help you identify the right replacement.
Can't Find the Right Part? We Can Help.
Western Tub and Pool specializes in hard-to-find hot tub and spa replacement parts. If you're not sure which part you need, don't worry — our team is here to help you get it right the first time.
Here's how to get assistance:
Check your part number if known
Take a photo of the existing part and its surrounding plumbing
Note your hot tub's make, model, and serial number
Send everything to fixmytub@gmail.com — we'll take it from there
Shop and Order at Western Tub and Pool
? Call us: 1-855-248-0777
✉️ Email us: fixmytub@gmail.com
Browse our full online catalogue for more spa parts, hot tub components, and repair accessories. From common fittings to discontinued parts, Western Tub and Pool is your go-to source for hot tub repairs done right.")
Product Description
1/4″ x 3/8″ Barbed Adapter — Spa & Hot Tub Replacement Part
Find the exact barbed adapter your hot tub needs, fast. The 1/4″ x 3/8″ Barbed Adapter is a small but essential plumbing fitting used across a wide range of spa and hot tub models. Whether you're reconnecting an air line, replacing a worn fitting, or restoring your ozonator connection, this is the part that gets your tub back up and running.
Shop and order at Western Tub and Pool.
? [1-855-248-0777] | ✉️ [fixmytub@gmail.com]
What Is the 1/4″ x 3/8″ Barbed Adapter?
This barbed reducer adapter connects 1/4″ vinyl tubing to 3/8″ vinyl hose — or vice versa — creating a reliable, leak-resistant junction in your spa's plumbing system. It is commonly used in air line systems, ozonator connections, and various pump-side plumbing configurations across many hot tub brands and models.
SKU: SPA/WW672-4350
Also known as: Barb Adapter 1/4″ x 3/8″ | PVC Tubing Reducer 3/8″ Barb x 1/4″ Barb | Barbed Fitting 1/4″ MPT x 3/8″ Barb
Product Specifications
|
Specification |
Details |
|---|---|
|
Part Name |
1/4″ x 3/8″ Barbed Adapter |
|
SKU / Part Number |
SPA/WW672-4350 |
|
Thread Type |
1/4″ MPT (Male Pipe Thread) x 3/8″ Barb |
|
Shipping Dimensions |
1.5″ x 0.78″ x 0.78″ |
|
Shipping Weight |
0.05 lbs |
|
Material |
PVC / Plastic |
|
Application |
Connects 1/4″ and 3/8″ vinyl tubing in spa plumbing systems |
Compatible Hot Tubs, Spas & Models
This adapter is a widely used spa plumbing component that fits many hot tub brands and models. Known compatible applications include:
- Jacuzzi — J-300 Series Pumps
- Strong Spas — Various models using WW672-4350 specification
- Waterway Plastics — Systems using RF850 barb adapter fittings
- Many additional spa and hot tub brands using standard 1/4″ x 3/8″ barbed plumbing connections
Not sure if this is the right part for your tub? Don't guess — call us at 1-855-248-0777 or email fixmytub@gmail.com with your hot tub's make, model, and serial number, and our team will confirm compatibility before you order.
Common Uses for This Part
- Connecting ozonator tubing to air line plumbing
- Reducing or expanding between 1/4″ and 3/8″ vinyl hose runs
- Replacing cracked, brittle, or leaking barbed fittings in pump assemblies
- Repairing air injection and hydrotherapy jet plumbing systems
Frequently Asked Questions
What does a 1/4″ x 3/8″ barbed adapter do?
It creates a secure, barbed connection between two different-sized vinyl tubes — one measuring 1/4″ and the other 3/8″. The barbed design grips the inside of the tubing to prevent slipping or leaking under normal spa operating pressure.
How do I know if this is the right size for my hot tub?
Check the tubing currently connected to the fitting you need to replace. If one side is 1/4″ tubing and the other is 3/8″ tubing, this is your part. If you're unsure, send us a photo of the existing fitting along with your hot tub's make, model, and serial number at fixmytub@gmail.com.
Is this a hard-to-find part?
It can be. Many older or discontinued spa models still rely on these fittings, and they're not always easy to source locally. Western Tub and Pool specializes in exactly these kinds of hard-to-find replacement parts — give us a call and we'll help you track down what you need.
What is the part number for this adapter?
The SKU is SPA/WW672-4350. Cross-reference part numbers include RF850 (Waterway Plastics) and barb25x38.
Can I order by phone or email?
Absolutely. Call us at 1-855-248-0777 or send your order and inquiries to fixmytub@gmail.com. Our team is happy to assist with part identification, compatibility checks, and orders.
Do you offer assistance identifying other replacement parts?
Yes. If you're not sure what part you need, send us an email with a photo of the part, along with your hot tub's make, model, and serial number. We'll help you identify the right replacement.
Can't Find the Right Part? We Can Help.
Western Tub and Pool specializes in hard-to-find hot tub and spa replacement parts. If you're not sure which part you need, don't worry — our team is here to help you get it right the first time.
Here's how to get assistance:
- Check your part number if known
- Take a photo of the existing part and its surrounding plumbing
- Note your hot tub's make, model, and serial number
- Send everything to fixmytub@gmail.com — we'll take it from there
Shop and Order at Western Tub and Pool
? Call us: 1-855-248-0777
✉️ Email us:fixmytub@gmail.com
Browse our full online catalogue for more spa parts, hot tub components, and repair accessories. From common fittings to discontinued parts, Western Tub and Pool is your go-to source for hot tub repairs done right.
![1/4″ x 3/8″ Barbed Adapter — Spa & Hot Tub Replacement Part
Find the exact barbed adapter your hot tub needs, fast. The 1/4″ x 3/8″ Barbed Adapter is a small but essential plumbing fitting used across a wide range of spa and hot tub models. Whether you're reconnecting an air line, replacing a worn fitting, or restoring your ozonator connection, this is the part that gets your tub back up and running.
Shop and order at Western Tub and Pool.
? [1-855-248-0777] | ✉️ [fixmytub@gmail.com]
What Is the 1/4″ x 3/8″ Barbed Adapter?
This barbed reducer adapter connects 1/4″ vinyl tubing to 3/8″ vinyl hose — or vice versa — creating a reliable, leak-resistant junction in your spa's plumbing system. It is commonly used in air line systems, ozonator connections, and various pump-side plumbing configurations across many hot tub brands and models.
SKU: SPA/WW672-4350
Also known as: Barb Adapter 1/4″ x 3/8″ | PVC Tubing Reducer 3/8″ Barb x 1/4″ Barb | Barbed Fitting 1/4″ MPT x 3/8″ Barb
Product Specifications
Specification
Details
Part Name
1/4″ x 3/8″ Barbed Adapter
SKU / Part Number
SPA/WW672-4350
Thread Type
1/4″ MPT (Male Pipe Thread) x 3/8″ Barb
Shipping Dimensions
1.5″ x 0.78″ x 0.78″
Shipping Weight
0.05 lbs
Material
PVC / Plastic
Application
Connects 1/4″ and 3/8″ vinyl tubing in spa plumbing systems
Compatible Hot Tubs, Spas & Models
This adapter is a widely used spa plumbing component that fits many hot tub brands and models. Known compatible applications include:
Jacuzzi — J-300 Series Pumps
Strong Spas — Various models using WW672-4350 specification
Waterway Plastics — Systems using RF850 barb adapter fittings
Many additional spa and hot tub brands using standard 1/4″ x 3/8″ barbed plumbing connections
Not sure if this is the right part for your tub? Don't guess — call us at 1-855-248-0777 or email fixmytub@gmail.com with your hot tub's make, model, and serial number, and our team will confirm compatibility before you order.
Common Uses for This Part
Connecting ozonator tubing to air line plumbing
Reducing or expanding between 1/4″ and 3/8″ vinyl hose runs
Replacing cracked, brittle, or leaking barbed fittings in pump assemblies
Repairing air injection and hydrotherapy jet plumbing systems
Frequently Asked Questions
What does a 1/4″ x 3/8″ barbed adapter do?
It creates a secure, barbed connection between two different-sized vinyl tubes — one measuring 1/4″ and the other 3/8″. The barbed design grips the inside of the tubing to prevent slipping or leaking under normal spa operating pressure.
How do I know if this is the right size for my hot tub?
Check the tubing currently connected to the fitting you need to replace. If one side is 1/4″ tubing and the other is 3/8″ tubing, this is your part. If you're unsure, send us a photo of the existing fitting along with your hot tub's make, model, and serial number at fixmytub@gmail.com.
Is this a hard-to-find part?
It can be. Many older or discontinued spa models still rely on these fittings, and they're not always easy to source locally. Western Tub and Pool specializes in exactly these kinds of hard-to-find replacement parts — give us a call and we'll help you track down what you need.
What is the part number for this adapter?
The SKU is SPA/WW672-4350. Cross-reference part numbers include RF850 (Waterway Plastics) and barb25x38.
Can I order by phone or email?
Absolutely. Call us at 1-855-248-0777 or send your order and inquiries to fixmytub@gmail.com. Our team is happy to assist with part identification, compatibility checks, and orders.
Do you offer assistance identifying other replacement parts?
Yes. If you're not sure what part you need, send us an email with a photo of the part, along with your hot tub's make, model, and serial number. We'll help you identify the right replacement.
Can't Find the Right Part? We Can Help.
Western Tub and Pool specializes in hard-to-find hot tub and spa replacement parts. If you're not sure which part you need, don't worry — our team is here to help you get it right the first time.
Here's how to get assistance:
Check your part number if known
Take a photo of the existing part and its surrounding plumbing
Note your hot tub's make, model, and serial number
Send everything to fixmytub@gmail.com — we'll take it from there
Shop and Order at Western Tub and Pool
? Call us: 1-855-248-0777
✉️ Email us: fixmytub@gmail.com
Browse our full online catalogue for more spa parts, hot tub components, and repair accessories. From common fittings to discontinued parts, Western Tub and Pool is your go-to source for hot tub repairs done right.](https://cdn11.bigcommerce.com/s-b7yzllubsu/images/stencil/500x659/products/4199/6240/SPA-WW672-4350__21903.1773434048.jpg?c=2 "1/4″ x 3/8″ Barbed Adapter — Spa & Hot Tub Replacement Part
Find the exact barbed adapter your hot tub needs, fast. The 1/4″ x 3/8″ Barbed Adapter is a small but essential plumbing fitting used across a wide range of spa and hot tub models. Whether you're reconnecting an air line, replacing a worn fitting, or restoring your ozonator connection, this is the part that gets your tub back up and running.
Shop and order at Western Tub and Pool.
? [1-855-248-0777] | ✉️ [fixmytub@gmail.com]
What Is the 1/4″ x 3/8″ Barbed Adapter?
This barbed reducer adapter connects 1/4″ vinyl tubing to 3/8″ vinyl hose — or vice versa — creating a reliable, leak-resistant junction in your spa's plumbing system. It is commonly used in air line systems, ozonator connections, and various pump-side plumbing configurations across many hot tub brands and models.
SKU: SPA/WW672-4350
Also known as: Barb Adapter 1/4″ x 3/8″ | PVC Tubing Reducer 3/8″ Barb x 1/4″ Barb | Barbed Fitting 1/4″ MPT x 3/8″ Barb
Product Specifications
Specification
Details
Part Name
1/4″ x 3/8″ Barbed Adapter
SKU / Part Number
SPA/WW672-4350
Thread Type
1/4″ MPT (Male Pipe Thread) x 3/8″ Barb
Shipping Dimensions
1.5″ x 0.78″ x 0.78″
Shipping Weight
0.05 lbs
Material
PVC / Plastic
Application
Connects 1/4″ and 3/8″ vinyl tubing in spa plumbing systems
Compatible Hot Tubs, Spas & Models
This adapter is a widely used spa plumbing component that fits many hot tub brands and models. Known compatible applications include:
Jacuzzi — J-300 Series Pumps
Strong Spas — Various models using WW672-4350 specification
Waterway Plastics — Systems using RF850 barb adapter fittings
Many additional spa and hot tub brands using standard 1/4″ x 3/8″ barbed plumbing connections
Not sure if this is the right part for your tub? Don't guess — call us at 1-855-248-0777 or email fixmytub@gmail.com with your hot tub's make, model, and serial number, and our team will confirm compatibility before you order.
Common Uses for This Part
Connecting ozonator tubing to air line plumbing
Reducing or expanding between 1/4″ and 3/8″ vinyl hose runs
Replacing cracked, brittle, or leaking barbed fittings in pump assemblies
Repairing air injection and hydrotherapy jet plumbing systems
Frequently Asked Questions
What does a 1/4″ x 3/8″ barbed adapter do?
It creates a secure, barbed connection between two different-sized vinyl tubes — one measuring 1/4″ and the other 3/8″. The barbed design grips the inside of the tubing to prevent slipping or leaking under normal spa operating pressure.
How do I know if this is the right size for my hot tub?
Check the tubing currently connected to the fitting you need to replace. If one side is 1/4″ tubing and the other is 3/8″ tubing, this is your part. If you're unsure, send us a photo of the existing fitting along with your hot tub's make, model, and serial number at fixmytub@gmail.com.
Is this a hard-to-find part?
It can be. Many older or discontinued spa models still rely on these fittings, and they're not always easy to source locally. Western Tub and Pool specializes in exactly these kinds of hard-to-find replacement parts — give us a call and we'll help you track down what you need.
What is the part number for this adapter?
The SKU is SPA/WW672-4350. Cross-reference part numbers include RF850 (Waterway Plastics) and barb25x38.
Can I order by phone or email?
Absolutely. Call us at 1-855-248-0777 or send your order and inquiries to fixmytub@gmail.com. Our team is happy to assist with part identification, compatibility checks, and orders.
Do you offer assistance identifying other replacement parts?
Yes. If you're not sure what part you need, send us an email with a photo of the part, along with your hot tub's make, model, and serial number. We'll help you identify the right replacement.
Can't Find the Right Part? We Can Help.
Western Tub and Pool specializes in hard-to-find hot tub and spa replacement parts. If you're not sure which part you need, don't worry — our team is here to help you get it right the first time.
Here's how to get assistance:
Check your part number if known
Take a photo of the existing part and its surrounding plumbing
Note your hot tub's make, model, and serial number
Send everything to fixmytub@gmail.com — we'll take it from there
Shop and Order at Western Tub and Pool
? Call us: 1-855-248-0777
✉️ Email us: fixmytub@gmail.com
Browse our full online catalogue for more spa parts, hot tub components, and repair accessories. From common fittings to discontinued parts, Western Tub and Pool is your go-to source for hot tub repairs done right.")
