Introducing the Pentair Rainbow Filter Air Relief And Drain Screw Knob in sleek Black – your trusty sidekick for a bubbly and rejuvenating soak in your Cal Spa Hot Tub! Dive into the world of relaxation and cleanliness with this nifty little knob.

This ingenious knob is like a secret agent for your spa, ensuring your Cal Spa Hot Tub is always at its sparkling best. It's so easy to use that even your cat could do it (well, almost). Just twist, and voilà! The air relief and drain function is at your fingertips.

Say goodbye to those annoying bubbles that interrupt your zen mode – with this knob, you're the boss of your bubbles. Keep the water just the way you like it with a simple turn. It's a mini underwater orchestra conductor, directing the symphony of your hot tub experience.

The sleek black design not only looks snazzy but also complements your Cal Spa Hot Tub seamlessly. It's like the James Bond of hot tub accessories, with a touch of style that'll leave you shaken (not stirred).

So, are you ready to take your hot tub experience to a whole new level of aquatic awesomeness? Get your Pentair Rainbow Filter Air Relief And Drain Screw Knob now and watch your Cal Spa Hot Tub transform into a watery wonderland of relaxation and delight. This little black knob will make your hot tub sparkle like never before!