Pentair Sta-Rite MasterTemp/Max-E-Therm Manifold Bypass Valve Kit (77707-0001) bathpumps The Darlly 60403 is especially

The Darlly 60403 is especially useful for service work where a 45 square foot cartridge with a narrower top opening and SAE lower fitment is needed to avoid guesswork and improve replacement accuracy

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

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

Pentair Sta-Rite MasterTemp/Max-E-Therm Manifold Bypass Valve Kit (77707-0001) bathpumps The Darlly 60403 is especiallyThe 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