A premium‑grade Vaillant Diverter Valve Kit (3/4″ BSP × 1/2″ BSP) is the perfect replacement for ecoMAX, ecoTEC, Turbomax and other Vaillant combi boilers. The kit includes a brass diverter valve, a removable actuator head, a retaining clip and two washers – everything you need for a quick, secure install.
Why it matters
The diverter valve decides whether heated water goes to your radiators or to your taps and showers, keeping water pressure and temperature steady while allowing the dual‑functionality of a combi boiler (no separate hot‑water cylinder required). The detachable actuator head lets you service or replace the motor without pulling the whole valve out of the boiler, saving time and effort.
Key features
– Premium brass construction – excellent heat resistance and long‑lasting durability
– Removable actuator head for easy maintenance
– 3/4″ BSP male thread / 1/2″ BSP female connection – matches original part #252457
– Includes washers (24 mm × 18 mm) and a 38 mm retaining clip for a tight fit
– Height: 140 mm; designed to fit a wide range of Vaillant models (ecoMAX, ecoTEC, Turbomax Plus, Pro, VUW series, etc.)
Fitment
Compatible with most Vaillant combi models from 2000‑2016, including Aqua Plus, ecoMAX 824/2 E, ecoTEC Exclusive 832/838, Turbomax Plus/Pro series and many VUW variants.
Replace your old valve with confidence – this kit restores optimal flow control, improves boiler efficiency and helps extend the life of your heating system. Packaged securely in a box for safe delivery.
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