water not hot enough due to change to mains

we have changed our water system from tank feed to mains i have turned the back plate to high pressure there is a slight whistle also the water is very cool i turned up the temp but still no difference the one im using is the purple one now 2 years old
Asked 9 years ago by Anonymous

The Excel requires equal hot and cold water pressures and if you now have mains cold and a combi boiler or unvented hot water cylinder a pressure equalising valve should be fitted in the feeds to the unit

Answered 9 years ago by Anonymous

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