how to replace a multiblock valve on a unvented cylinder

Описание к видео how to replace a multiblock valve on a unvented cylinder

alot of plumbers have different names for a multi block valve / PRV like combination valve or cluster valve or even inlet valve.
these commonly breakdown and drip from the discharge pipe after a service.
its a simple job and having the understanding of the safety features when learning for bpec or any unvented training, this will help.
so how to install one...

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