Product Description
Gecko S-Class 3.0kW Flo-Thru Heater Assembly
![Gecko S-Class 3.0kW Flo-Thru Heater Assembly — 26-0800-4S-K Your hot tub deserves reliable heat. The Gecko S-Class 3.0kW Flo-Thru Heater Assembly is a trusted OEM-quality replacement part, built to restore your spa to full working order — fast. Shop and order at Western Tub and Pool Call us: 1-855-248-0777 | Email: fixmytub@gmail.com [Shop Now] [Call for Assistance] Why Choose the Gecko S-Class 3.0kW Heater Assembly? When your hot tub stops heating, every day without it feels like a loss. The Gecko S-Class Flo-Thru Heater Assembly is one of the most widely used replacement heater units in the industry — compatible with a broad range of spa brands and control systems. Whether you're a homeowner doing a DIY repair or a technician servicing a client's unit, this is the part that gets the job done. OEM-Grade Reliability Engineered to meet the original manufacturer's specifications, this heater assembly delivers consistent, efficient heat output you can count on season after season. Broad Compatibility Compatible with a wide range of hot tub brands, models, and Gecko control systems — making it one of the most versatile spa heater replacements on the market. Easy to Source, Easy to Install A direct replacement that aligns with existing spa configurations, reducing installation time and the need for additional modifications. Backed by Expert Support Not sure if this is the right part? Our team at Western Tub and Pool is available by phone or email to help you confirm compatibility before you buy. Product Specifications Specification Details Part Number 26-0800-4S-K Brand Gecko Series S-Class Power Output 3.0kW Type Flo-Thru Heater Assembly Voltage 240V Heater Tube Material Stainless Steel Flow Switch Included Dimensions Approx. 14" L x 3.5" W x 3.5" H (verify against your existing unit) Weight Approx. 2.5 lbs Note: Specifications may vary slightly by production batch or regional variant. Contact us to confirm dimensions for your specific application. Compatible Hot Tub Brands and Models The Gecko S-Class 3.0kW Flo-Thru Heater Assembly is used in many popular hot tub and spa models, including those manufactured by: Jacuzzi Beachcomber Sundance Spas Master Spas Marquis Spas Nordic Hot Tubs Vita Spas Sunrise Spas PDC Spas Wellis Spas Hydropool Cal Spas Emerald Spas Strong Spas Many other brands using Gecko SSPA and S-Class control systems Don't see your brand listed? Call us at 1-855-248-0777 — our team can confirm compatibility with your specific make and model. Compatible Gecko Control Systems This heater assembly is designed to work seamlessly with the following Gecko control systems: Gecko SSPA Series Gecko S-Class Series Gecko IN.YJ Series Gecko IN.XE Series Gecko IN.YE Series Other Gecko-based topside control configurations Cross-Reference Part Numbers If you're searching by an alternate part number, this heater may also be listed as: 26-0800-4S 26-0800-4 9920-400892 0600-221054 Heater Assembly S-Class 3.0kW 240V Have a part number not listed here? Send it to us at fixmytub@gmail.com and we'll verify the match for you. Related Replacement Parts If you're repairing or servicing your heater system, you may also need: Heater Element Only (for tube replacement) Flow Switch / Pressure Switch Heater Manifold / Unions Spa Pack / Control Box Temp Sensor / Hi-Limit Sensor Topside Control Panel Circulation Pump Browse our full catalogue online or call 1-855-248-0777 to build a complete repair parts list. [View Our Online Catalogue] Frequently Asked Questions How do I know if this is the right heater for my hot tub? The best way to confirm compatibility is to locate your spa's existing heater part number (usually printed on a label on the heater tube or the spa pack) and cross-reference it with the numbers listed above. You can also send us your hot tub's make, model, and serial number, along with a photo of the existing heater, and our team will verify the fit before you order. What is the difference between a Flo-Thru heater and a pressure heater? A Flo-Thru heater does not require back-pressure to operate — it heats water as it flows through the tube. This design is common in systems with dedicated circulation pumps. A pressure heater, by contrast, relies on back-pressure generated by the pump. It's important to replace like-for-like, so check your existing heater type before ordering. What does the "S-Class" designation mean? The S-Class is a specific product series within Gecko's lineup of spa equipment. S-Class components — including heaters, packs, and topside controls — are designed to work together as an integrated system. Using an S-Class heater in an S-Class system ensures proper electrical and physical compatibility. Can I install this heater myself? Many experienced DIYers successfully replace spa heater assemblies at home. That said, working with electrical components and plumbing does carry risk. If you're unsure, we recommend consulting a certified spa technician. Our team is also happy to walk you through the process — just give us a call. Do you ship internationally? Yes. Western Tub and Pool is an international e-tailer. We source parts from warehouse locations across multiple regions, which means shipping times and costs may vary depending on where inventory is dispatched from. See our regional suffix guide below for more details. Understanding Regional Part Suffixes As an international e-tailer, Western Tub and Pool stocks parts sourced from warehouses in multiple regions. To help you identify the origin of your part, we use the following suffix system: Suffix Region of Origin U United States (e.g., 26-0800-4S-K-U) C Canada (e.g., 26-0800-4S-K-C) E Europe (e.g., 26-0800-4S-K-E) A Asia (e.g., 26-0800-4S-K-A) Please note: Some parts may be available from more than one regional warehouse. While the core part is identical, the suffix indicates the fulfillment origin and may affect shipping timelines and costs. If you have a preference for a specific regional variant, let us know when you order. Not Sure You Have the Right Part? We get it — navigating spa parts can be confusing. Here's how to make sure you order with confidence: Check your existing part number, usually found on the heater label or spa pack documentation. Cross-reference it against the numbers listed on this page. Send us a photo of your existing heater along with your spa's make, model, and serial number. We'll confirm the match and let you know if any additional parts are needed for your repair. Get the Right Part — the First Time Hard-to-find part? Send us an email at fixmytub@gmail.com with your spa's make, model, serial number, and any photos you have of the existing heater. Our team will track down exactly what you need. Shop and order at Western Tub and Pool. Call us: 1-855-248-0777 Email: fixmytub@gmail.com [Shop Now] [Email Us] [Call for Assistance] Gecko S-Class 3.0kW Flo-Thru Heater Assembly — 26-0800-4S-K Your hot tub deserves reliable heat. The Gecko S-Class 3.0kW Flo-Thru Heater Assembly is a trusted OEM-quality replacement part, built to restore your spa to full working order — fast. Shop and order at Western Tub and Pool Call us: 1-855-248-0777 | Email: fixmytub@gmail.com [Shop Now] [Call for Assistance] Why Choose the Gecko S-Class 3.0kW Heater Assembly? When your hot tub stops heating, every day without it feels like a loss. The Gecko S-Class Flo-Thru Heater Assembly is one of the most widely used replacement heater units in the industry — compatible with a broad range of spa brands and control systems. Whether you're a homeowner doing a DIY repair or a technician servicing a client's unit, this is the part that gets the job done. OEM-Grade Reliability Engineered to meet the original manufacturer's specifications, this heater assembly delivers consistent, efficient heat output you can count on season after season. Broad Compatibility Compatible with a wide range of hot tub brands, models, and Gecko control systems — making it one of the most versatile spa heater replacements on the market. Easy to Source, Easy to Install A direct replacement that aligns with existing spa configurations, reducing installation time and the need for additional modifications. Backed by Expert Support Not sure if this is the right part? Our team at Western Tub and Pool is available by phone or email to help you confirm compatibility before you buy. Product Specifications Specification Details Part Number 26-0800-4S-K Brand Gecko Series S-Class Power Output 3.0kW Type Flo-Thru Heater Assembly Voltage 240V Heater Tube Material Stainless Steel Flow Switch Included Dimensions Approx. 14" L x 3.5" W x 3.5" H (verify against your existing unit) Weight Approx. 2.5 lbs Note: Specifications may vary slightly by production batch or regional variant. Contact us to confirm dimensions for your specific application. Compatible Hot Tub Brands and Models The Gecko S-Class 3.0kW Flo-Thru Heater Assembly is used in many popular hot tub and spa models, including those manufactured by: Jacuzzi Beachcomber Sundance Spas Master Spas Marquis Spas Nordic Hot Tubs Vita Spas Sunrise Spas PDC Spas Wellis Spas Hydropool Cal Spas Emerald Spas Strong Spas Many other brands using Gecko SSPA and S-Class control systems Don't see your brand listed? Call us at 1-855-248-0777 — our team can confirm compatibility with your specific make and model. Compatible Gecko Control Systems This heater assembly is designed to work seamlessly with the following Gecko control systems: Gecko SSPA Series Gecko S-Class Series Gecko IN.YJ Series Gecko IN.XE Series Gecko IN.YE Series Other Gecko-based topside control configurations Cross-Reference Part Numbers If you're searching by an alternate part number, this heater may also be listed as: 26-0800-4S 26-0800-4 9920-400892 0600-221054 Heater Assembly S-Class 3.0kW 240V Have a part number not listed here? Send it to us at fixmytub@gmail.com and we'll verify the match for you. Related Replacement Parts If you're repairing or servicing your heater system, you may also need: Heater Element Only (for tube replacement) Flow Switch / Pressure Switch Heater Manifold / Unions Spa Pack / Control Box Temp Sensor / Hi-Limit Sensor Topside Control Panel Circulation Pump Browse our full catalogue online or call 1-855-248-0777 to build a complete repair parts list. [View Our Online Catalogue] Frequently Asked Questions How do I know if this is the right heater for my hot tub? The best way to confirm compatibility is to locate your spa's existing heater part number (usually printed on a label on the heater tube or the spa pack) and cross-reference it with the numbers listed above. You can also send us your hot tub's make, model, and serial number, along with a photo of the existing heater, and our team will verify the fit before you order. What is the difference between a Flo-Thru heater and a pressure heater? A Flo-Thru heater does not require back-pressure to operate — it heats water as it flows through the tube. This design is common in systems with dedicated circulation pumps. A pressure heater, by contrast, relies on back-pressure generated by the pump. It's important to replace like-for-like, so check your existing heater type before ordering. What does the "S-Class" designation mean? The S-Class is a specific product series within Gecko's lineup of spa equipment. S-Class components — including heaters, packs, and topside controls — are designed to work together as an integrated system. Using an S-Class heater in an S-Class system ensures proper electrical and physical compatibility. Can I install this heater myself? Many experienced DIYers successfully replace spa heater assemblies at home. That said, working with electrical components and plumbing does carry risk. If you're unsure, we recommend consulting a certified spa technician. Our team is also happy to walk you through the process — just give us a call. Do you ship internationally? Yes. Western Tub and Pool is an international e-tailer. We source parts from warehouse locations across multiple regions, which means shipping times and costs may vary depending on where inventory is dispatched from. See our regional suffix guide below for more details. Understanding Regional Part Suffixes As an international e-tailer, Western Tub and Pool stocks parts sourced from warehouses in multiple regions. To help you identify the origin of your part, we use the following suffix system: Suffix Region of Origin U United States (e.g., 26-0800-4S-K-U) C Canada (e.g., 26-0800-4S-K-C) E Europe (e.g., 26-0800-4S-K-E) A Asia (e.g., 26-0800-4S-K-A) Please note: Some parts may be available from more than one regional warehouse. While the core part is identical, the suffix indicates the fulfillment origin and may affect shipping timelines and costs. If you have a preference for a specific regional variant, let us know when you order. Not Sure You Have the Right Part? We get it — navigating spa parts can be confusing. Here's how to make sure you order with confidence: Check your existing part number, usually found on the heater label or spa pack documentation. Cross-reference it against the numbers listed on this page. Send us a photo of your existing heater along with your spa's make, model, and serial number. We'll confirm the match and let you know if any additional parts are needed for your repair. Get the Right Part — the First Time Hard-to-find part? Send us an email at fixmytub@gmail.com with your spa's make, model, serial number, and any photos you have of the existing heater. Our team will track down exactly what you need. Shop and order at Western Tub and Pool. Call us: 1-855-248-0777 Email: fixmytub@gmail.com [Shop Now] [Email Us] [Call for Assistance]](https://cdn11.bigcommerce.com/s-b7yzllubsu/product_images/uploaded_images/s-class.png)
Your hot tub deserves reliable heat. The Gecko S-Class 3.0kW Flo-Thru Heater Assembly is a trusted OEM-quality replacement part, built to restore your spa to full working order — fast.
Shop and order at Western Tub and Pool
Call us: 1-855-248-0777 | Email: fixmytub@gmail.com
[Shop Now] [Call for Assistance]
Why Choose the Gecko S-Class 3.0kW Heater Assembly?
When your hot tub stops heating, every day without it feels like a loss. The Gecko S-Class Flo-Thru Heater Assembly is one of the most widely used replacement heater units in the industry — compatible with a broad range of spa brands and control systems. Whether you're a homeowner doing a DIY repair or a technician servicing a client's unit, this is the part that gets the job done.
OEM-Grade Reliability
Engineered to meet the original manufacturer's specifications, this heater assembly delivers consistent, efficient heat output you can count on season after season.
Broad Compatibility
Compatible with a wide range of hot tub brands, models, and Gecko control systems — making it one of the most versatile spa heater replacements on the market.
Easy to Source, Easy to Install
A direct replacement that aligns with existing spa configurations, reducing installation time and the need for additional modifications.
Backed by Expert Support
Not sure if this is the right part? Our team at Western Tub and Pool is available by phone or email to help you confirm compatibility before you buy.
Product Specifications
|
Specification |
Details |
|---|---|
|
Part Number |
26-0800-4S-K |
|
Brand |
Gecko |
|
Series |
S-Class |
|
Power Output |
3.0kW |
|
Type |
Flo-Thru Heater Assembly |
|
Voltage |
240V |
|
Heater Tube Material |
Stainless Steel |
|
Flow Switch |
Included |
|
Dimensions |
Approx. 14" L x 3.5" W x 3.5" H (verify against your existing unit) |
|
Weight |
Approx. 2.5 lbs |
Note: Specifications may vary slightly by production batch or regional variant. Contact us to confirm dimensions for your specific application.
Compatible Hot Tub Brands and Models
The Gecko S-Class 3.0kW Flo-Thru Heater Assembly is used in many popular hot tub and spa models, including those manufactured by:
- Jacuzzi
- Beachcomber
- Sundance Spas
- Master Spas
- Marquis Spas
- Nordic Hot Tubs
- Vita Spas
- Sunrise Spas
- PDC Spas
- Wellis Spas
- Hydropool
- Cal Spas
- Emerald Spas
- Strong Spas
- Many other brands using Gecko SSPA and S-Class control systems
Don't see your brand listed? Call us at 1-855-248-0777 — our team can confirm compatibility with your specific make and model.
Compatible Gecko Control Systems
This heater assembly is designed to work seamlessly with the following Gecko control systems:
- Gecko SSPA Series
- Gecko S-Class Series
- Gecko IN.YJ Series
- Gecko IN.XE Series
- Gecko IN.YE Series
- Other Gecko-based topside control configurations
Cross-Reference Part Numbers
If you're searching by an alternate part number, this heater may also be listed as:
- 26-0800-4S
- 26-0800-4
- 9920-400892
- 0600-221054
- Heater Assembly S-Class 3.0kW 240V
Have a part number not listed here? Send it to us at fixmytub@gmail.com and we'll verify the match for you.
Related Replacement Parts
If you're repairing or servicing your heater system, you may also need:
- Heater Element Only (for tube replacement)
- Flow Switch / Pressure Switch
- Heater Manifold / Unions
- Spa Pack / Control Box
- Temp Sensor / Hi-Limit Sensor
- Topside Control Panel
- Circulation Pump
Browse our full catalogue online or call 1-855-248-0777 to build a complete repair parts list.
[View Our Online Catalogue]
Frequently Asked Questions
How do I know if this is the right heater for my hot tub?
The best way to confirm compatibility is to locate your spa's existing heater part number (usually printed on a label on the heater tube or the spa pack) and cross-reference it with the numbers listed above. You can also send us your hot tub's make, model, and serial number, along with a photo of the existing heater, and our team will verify the fit before you order.
What is the difference between a Flo-Thru heater and a pressure heater?
A Flo-Thru heater does not require back-pressure to operate — it heats water as it flows through the tube. This design is common in systems with dedicated circulation pumps. A pressure heater, by contrast, relies on back-pressure generated by the pump. It's important to replace like-for-like, so check your existing heater type before ordering.
What does the "S-Class" designation mean?
The S-Class is a specific product series within Gecko's lineup of spa equipment. S-Class components — including heaters, packs, and topside controls — are designed to work together as an integrated system. Using an S-Class heater in an S-Class system ensures proper electrical and physical compatibility.
Can I install this heater myself?
Many experienced DIYers successfully replace spa heater assemblies at home. That said, working with electrical components and plumbing does carry risk. If you're unsure, we recommend consulting a certified spa technician. Our team is also happy to walk you through the process — just give us a call.
Do you ship internationally?
Yes. Western Tub and Pool is an international e-tailer. We source parts from warehouse locations across multiple regions, which means shipping times and costs may vary depending on where inventory is dispatched from. See our regional suffix guide below for more details.
Understanding Regional Part Suffixes
As an international e-tailer, Western Tub and Pool stocks parts sourced from warehouses in multiple regions. To help you identify the origin of your part, we use the following suffix system:
|
Suffix |
Region of Origin |
|---|---|
|
U |
United States (e.g., 26-0800-4S-K-U) |
|
C |
Canada (e.g., 26-0800-4S-K-C) |
|
E |
Europe (e.g., 26-0800-4S-K-E) |
|
A |
Asia (e.g., 26-0800-4S-K-A) |
Please note: Some parts may be available from more than one regional warehouse. While the core part is identical, the suffix indicates the fulfillment origin and may affect shipping timelines and costs. If you have a preference for a specific regional variant, let us know when you order.
Not Sure You Have the Right Part?
We get it — navigating spa parts can be confusing. Here's how to make sure you order with confidence:
- Check your existing part number, usually found on the heater label or spa pack documentation.
- Cross-reference it against the numbers listed on this page.
- Send us a photo of your existing heater along with your spa's make, model, and serial number.
- We'll confirm the match and let you know if any additional parts are needed for your repair.
Get the Right Part — the First Time
Hard-to-find part? Send us an email at fixmytub@gmail.com with your spa's make, model, serial number, and any photos you have of the existing heater. Our team will track down exactly what you need.
Shop and order at Western Tub and Pool.
Call us: 1-855-248-0777
Email: fixmytub@gmail.com
[Shop Now] [Email Us] [Call for Assistance]
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