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

0 HP 56-frame assembly has become too worn for a small-parts-only rebuild and the repair needs a cleaner matched solution

When a control box no longer manages outputs correctly

The 22358 is a practical replacement for compatible Astral Pool systems that need renewed top-mount valve control and cleaner multi-mode performance

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