These RS PRO automatic bypass valves have been designed with the highest quality and versatility in mind. These valves maintain the desired minimum flow throughout the boiler when TRVs block the water path due to the radiators reaching the desired room temperature.
These RS PRO valves are an ideal solution for sealed systems to protect boiler pumps when zone valves close, decrease system noise which can result when TRVs or zone values close and improve the life of the boilers heat exchanger.

These RS PRO Pressure Relief Valves are ideal for maintaining the water flow in central heating systems fitted with TRVs.

Sealed heating systems
Hydronic heating systems

RS PRO is our own brand range and brings you a wide range of high-quality, great value products offering you more choice. Trusted by engineers all over the world, every part of every RS PRO product has been rigorously tested against demanding industry standards; they’re only given the RS PRO seal of approval if we’re confident of their exceptional quality, which means you can be confident too.