Pentair Sta-Rite S7D75/S8D110/DES/DEP Center Rod (23900-0039Z) rolachem 240 volt heater with high-limit

240 volt heater with high-limit and flow-switch support is required

A diaphragm like this is useful because it helps restore the internal operating action of the cleaner

When the sealing surface at a drain assembly begins to fail

A jacket panel is useful because it helps protect internal components while also contributing to the finished appearance and enclosure structure of the heater

Using the correct switch format helps preserve original control logic and mounting style

Pentair Sta-Rite S7D75/S8D110/DES/DEP Center Rod (23900-0039Z) rolachem 240 volt heater with high-limitThis center rod is used inside compatible Sta Rite S7D75, S8D110, DES, and DEP filter assemblies to help secure and align internal filter components. A bent, corroded, or damaged rod can make it difficult to tighten the assembly evenly and may compromise how the grids or internal parts seat inside the tank. Replacing it helps support even clamping pressure and reliable filter operation. Supports proper internal filter alignment Helps secure DE filter