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Posted 20 hours ago

Caleffi - 22mm Inlet Control Multibloc Valve Group 533002CST

£21.985£43.97Clearance
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ZTS2023
Joined in 2023
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About this deal

This includes a specific connection for a balanced cold water take offs and a dedicated connection for an expansion vessel. But thought best to change the whole thing, and now 6 months later dripping again, to my knowledge not been activated, so annoying faulty again after such short period? Or, could your PRV be allowing some flow-by during the night or day when there's no-one running water, and it's allowing the pressure on the domestic side to creep up to the point it drips out the safety valve?

I would imagine the safety release valve same as the one on the actual hot water tank are there to act if pressure goes to high. The unit comprises of a manifold containing a pressure reducing valve, a cold water balancing port with check valve, a check valve and a preset pressure relief valve.Pressure reducing valves (PRV) are installed in domestic water systems to reduce and stabilise the inlet pressure from the mains supply, which is generally too high and variable for domestic appliances to function properly. Another possibility that I forgot to mention is that the expansion vessel could be undersized - if the EV cannot cope with the amount of hot water expansion in the system it will then have to go somewhere else (the PRV). My understanding is the pressure reducing valve ( 3 bar) is to maintain a level and balanced pressure for cold flow and thus level flow and equal pressure on hot water.

You can change your choices at any time by visiting Cookie preferences, as described in the Cookie notice.These Caleffi inlet control groups are designed to control the pressure on the mains supply of an unvented hot water cylinder.

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