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    Hot and cold pressure drop off Unvented system

    Don't have an outside tap and haven't measured flow at bath as water seems to have righted itself and is back to normal. Only thing I had to do is up the pressure at the cylinder as it was down to 1.2 bar and the installer left instructions to set it at 2.5 - 3 bar; there is a gauge fitted next...
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    Hot and cold pressure drop off Unvented system

    It is an Ariston Contract STI210 Indirect ProTech.
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    Hot and cold pressure drop off Unvented system

    Just another thought. The rising main comes into the house via cupboard (where the jammed stop cock and surestop are located) under the stairs and pipe then goes through the ceiling. The kitchen has been extended (not by us) so pipework there all changed from when built. Turning off road...
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    Hot and cold pressure drop off Unvented system

    Thanks for the suggestions, I am away tomorrow but will look at the cylinder for the answers to your questions on Friday. Don't know if the cold taps are off the rising main - I just assumed they were.
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    Hot and cold pressure drop off Unvented system

    I forgot to say that I bypassed the surestop once the problem surfaced but it doesn't any difference. I have turned the stop cock in the road fully on; the one in the house is jammed and so no different to how it was before fitting the surestop. There is no strainer, at least not on the...
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    Hot and cold pressure drop off Unvented system

    I have an unvented system, ie both hot and cold are on mains pressure; there is no cold tank in the loft and a pressurized hot cylinder in a downstairs airing cupboard. I have just fitted a surestop water switch as the stop cock had seized. I turned off the water in the road and had to...
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