Pentair Fitting Injection with Check Valve | IntelliPH® Controller | 521510 C7490 or a failed contact

or a failed contact

Tie-dye island is made of heavy gauge vinyl

four small with screws

and neutralization)

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

Pentair Fitting Injection with Check Valve | IntelliPH® Controller | 521510 C7490 or a failed contactThe 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