Pentair Fitting Injection with Check Valve | IntelliPH® Controller | 521510 C7490 Tie-dye island is made of

Tie-dye island is made of heavy gauge vinyl

This spa pump motor meets California Energy Commission Appliance Regulations 2008 for ultimate efficiency**

A cracked or broken lateral allows fine sand to bypass into the return line and reenter the pool — the most common sign that a lateral needs replacing

dye-free formula leaves your skin and hair feeling incredibly soft and hydrated—without disrupting your water chemistry or fragrance experience

The Pearls Collection transforms your hydrotherapy sessions with a touch of sophistication and serenity

Pentair Fitting Injection with Check Valve | IntelliPH® Controller | 521510 C7490 Tie-dye island is made ofThe Pentair Fitting Injection with Check Valve (521510) is the OEM replacement injection fitting assembly for the Pentair IntelliPH pH controller system. This fitting serves as the chemical injection point where the IntelliPH controller delivers pH adjusting solution directly into the pool's return line. The integrated check valve prevents backflow of pool water into the chemical feed line, protecting the controller's dosing mechanism and maintaining