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Plumbing & Plumbers Forum - UFH pressure when running.
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UFH pressure when running.

Discuss UFH pressure when running. at UK Plumbers Forums; Hello I've laid wet UFH in the new extension (suspended floor) as follows: 1) 3 loops (about 80m each) in the zone. 2) 2 port valves for 3 zones on ...
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    Default UFH pressure when running.

    Hello

    I've laid wet UFH in the new extension (suspended floor) as follows:

    1) 3 loops (about 80m each) in the zone.
    2) 2 port valves for 3 zones on the flows (UFH, upstairs rads, downstairs rads).

    The pressure test indicates no leaks in any of the loops.

    When the valve to the UFH is closed, the pressure indicated on the manifold gauge drops to zero over a period of time. The boiler pressure remains at a steady 1.5 Bar. As soon as the valve is opened, the UFH manifold gauge pressure goes back up to 1.5. The zones are operating and heating effectively aside from this.

    Can anyone suggest other avenues of investigation or perhaps a theory on what may be happening?

    Thanks

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    Default Re: UFH pressure when running.

    First option - replace pressure gauge on ufh manifold and see what happens.

    If it's doing the same thing, test each circuit individually.
    Uheat – Wojtek likes this.



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    Default Re: UFH pressure when running.

    As long as you don't have to top up through th filling loop, I wouldn't worry. It's still connected hydraulicly (?) by the return pipework. If leaking you'd lose all your pressure from whole system. It's a bit of an anomaly that you'd have to see the system to explain (possibly). So, as long as there's no topping up required, best thing is STOP LOOKING AT THE GUAGE, and worry about something else, like what the wife gets up to while you're at work.lol.
    kash likes this.

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