Hi,
Gas engineer has advised fitting a Pressure Reducing Valve to the cold supply feed just before my combi boiler and setting it to 1.5 bar. I already have a mini expansion vessel/arrestor fitted near to the boiler, and he has suggested putting the PRV valve between that and the boiler so the mains will still get the benefit of the mini expansion vessel.
I asked about my mixer showers, and what the effect would be having cold water fed to them at mains pressure (~5 bar) and hot water at 1.5 bar. He said that it will make no difference as the flow will be unaffected.
Looking around this forum I get a different picture.
Whilst access and available pipework will make it easy to fit near the boiler, yet next to impossible near to the mains stop tap due to layout of pipes and access. I'd like to understand the affects of reducing only the hot water pressure down if possible. Do mixer showers have non return valves on their hot and cold supplies to prevent hot water for example finding its way back into the mains supply?
Gas engineer has advised fitting a Pressure Reducing Valve to the cold supply feed just before my combi boiler and setting it to 1.5 bar. I already have a mini expansion vessel/arrestor fitted near to the boiler, and he has suggested putting the PRV valve between that and the boiler so the mains will still get the benefit of the mini expansion vessel.
I asked about my mixer showers, and what the effect would be having cold water fed to them at mains pressure (~5 bar) and hot water at 1.5 bar. He said that it will make no difference as the flow will be unaffected.
Looking around this forum I get a different picture.
Whilst access and available pipework will make it easy to fit near the boiler, yet next to impossible near to the mains stop tap due to layout of pipes and access. I'd like to understand the affects of reducing only the hot water pressure down if possible. Do mixer showers have non return valves on their hot and cold supplies to prevent hot water for example finding its way back into the mains supply?
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