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- 16 May 2016
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Hi all, I am having a new boiler and pre-plumbed unvented cylinder installed soon. The boiler is going to be located around 4M from the stopcock (which is located directly below the 3 bathrooms the system will be feeding). I am also installing a new 32mm water main to ensure good flow.
The pre-plumbed cylinder comes with a pressure reducing valve on it, with a balanced cold feed output. But I am told they cannot spec a 28mm PRV, only 22mm. As I see it if I then feed all outlets from this to ensure a balanced supply I am limiting the effectiveness of the new water main. Also I will then be piping 2x22mm feeds (balanced hot and cold) back to above the main.
What I am thinking is that I could put a 28mm PRV at the main, set to the same pressure as the PRV on the cylinder. Then take a 22mm feed to the cylinder and back for hot water, and take a 22mm cold feed directly from the first PRV to the bathrooms, this will provide the full flow available from my massive (overkill I know) 32mm main. Any issues with this approach?
The pre-plumbed cylinder comes with a pressure reducing valve on it, with a balanced cold feed output. But I am told they cannot spec a 28mm PRV, only 22mm. As I see it if I then feed all outlets from this to ensure a balanced supply I am limiting the effectiveness of the new water main. Also I will then be piping 2x22mm feeds (balanced hot and cold) back to above the main.
What I am thinking is that I could put a 28mm PRV at the main, set to the same pressure as the PRV on the cylinder. Then take a 22mm feed to the cylinder and back for hot water, and take a 22mm cold feed directly from the first PRV to the bathrooms, this will provide the full flow available from my massive (overkill I know) 32mm main. Any issues with this approach?