Pentair Sta-Rite MasterTemp/Max-E-Therm Manifold Bypass Valve Kit (77707-0001) bathpumps Harwil D1 Q10N flow switch

Harwil D1 Q10N flow switch rated at 0

This tank lid is used with compatible PacFab FNS Plus 36 square foot DE filter systems where the upper housing requires replacement

The dark grey Emerald Cut style adds a more refined visual element than a plain functional insert alone

Helps maintain the intended look of the spa seating area

Pentair Sta-Rite MasterTemp/Max-E-Therm Manifold Bypass Valve Kit (77707-0001) bathpumps Harwil D1 Q10N flow switchThe manifold bypass valve kit supports controlled water movement inside compatible MasterTemp and Max E Therm heater manifolds. A worn or damaged bypass can affect heater flow behavior, temperature regulation, and internal water routing. Replacing the kit is often part of resolving heater performance issues related to flow, noise, or manifold service findings. This is a critical water path component and should be installed as part of a careful heater