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Potterton Cartridge Motor (720064401 & 720778601)
The Potterton Cartridge Motor (also identified as a Diverter Valve Cartridge) is the primary internal mechanical component within the composite hydraulic block. It is responsible for physically diverting the flow of heated primary water between the central heating radiators and the domestic hot water heat exchanger. This part is a direct replacement for part numbers 720064401 and 720778601, specifically designed for use in later composite manifold systems found in the Apollo and Performa ranges.
Responsive Mode Switching: Works in tandem with the electronic actuator to ensure the boiler responds instantly to hot water demand.
High-Grade Seals: Equipped with specialized O-rings designed to maintain a watertight seal even under high thermal stress and constant operation.
Composite Block Compatibility: Specifically engineered for the newer composite (plastic) hydraulic blocks, providing a smoother mechanical action than older brass equivalents.
System Reliability: Helps eliminate "let-by" issues where central heating radiators heat up while the boiler is in domestic hot water mode.
Compatible Models:
Potterton Apollo 25 — 47-393-38
Potterton Apollo 30 — 47-393-37
Potterton Performa 24 Eco HE 2 (Composite Block) — 47-393-25
Cross-Compatible Range: Also compatible with various Baxi Ecoblue and Neta-Tec ranges utilizing the same 3-way valve internal architecture.
Potterton
A00527-02
