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pressure reducing valve

A pressure regulator is a control valve that reduces the input pressure of a fluid to a desired value at its output. Regulators are used for gases and liquids, and can be an integral device with an output pressure setting, a restrictor and a sensor all in the one body, or consist of a separate pressure sensor, controller and flow valve.

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  1. D

    Caleffi pressure reducing valve

    I have a caleffi valve on my system. It has worked well for some 10 years. Recently I noticed it is not regulating, with no flow sits at mains pressure. With flow it regulates. Replaced cartridge but just the same. It is a Caleffi 5350, i.e a static regulator. Any ideas as to why performance has...
  2. R

    Pressure reducing valve - is this normal?

    Hi. Just been shown a job by an engineer friend who likes to mess around with things. He's fitted a pressure reducing valve to the supply pipe to a heated outbuilding. The mains pressure is 5 Bar, the valve has a gauge on it showing 2 Bar when taps are closed. He helps me out, so I don't...
  3. M

    Herz pressure reducing valve issues

    Hi one n all. I run maintenance for a building with 456 rooms in it. For each 2 rooms there is 1 riser with a PRV on the hot water supply. I'm constantly getting valves that seem to be sticking closed. In the 6 months since we opened, we've attended probably about 70 valves, and about 25 of them...
  4. D

    Pressure reducing valve

    Hi all, My pressure reducing value has failed on my unvented cylinder, my plumber has already changed the potable expansion vessel and prv and cold water is still running through the tundish. I hate being the annoying Googling customer, but I've found a Honeywell pressure reducing value on...
  5. K

    Choice of Pressure reducing valve

    Renovating bathroom just now and the wife wants mixer taps throughout. Normal single handle hobbj on the sink and a fancy traditional style beast on the bath. Hot water is supplied from unvented cylinder at 2 bar closed pressure, 1.5 bar ish when flowing full tilt. Cold is supplied from mains...
  6. S

    Megaflow 3 bar pressure reducing valve placement

    Hi, Have lived in our house for around 10 years and always had bad pressure if more than one tap is running, toilet is flushed etc(hot and cold). We have (what I believe to be) a mains pressure system with a non vented Megaflow cylinder. We are about to install a new thermostatic shower and...
  7. P

    Fog Horn noise when using Hot Water - Pressure Reducing Valve recently replaced

    A few months back the expansion vessel from the mains water supply failed and I had the vessel and the pressure reducing valve replaced. As part of the replacement the expansion vessel was fitted with a copper tube instead of the flexible hose that was originally used. Since the work was done...

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