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water pressure

Pressure (symbol: p or P) is the force applied perpendicular to the surface of an object per unit area over which that force is distributed.: 445  Gauge pressure (also spelled gage pressure) is the pressure relative to the ambient pressure.
Various units are used to express pressure. Some of these derive from a unit of force divided by a unit of area; the SI unit of pressure, the pascal (Pa), for example, is one newton per square metre (N/m2); similarly, the pound-force per square inch (psi) is the traditional unit of pressure in the imperial and U.S. customary systems. Pressure may also be expressed in terms of standard atmospheric pressure; the atmosphere (atm) is equal to this pressure, and the torr is defined as 1⁄760 of this. Manometric units such as the centimetre of water, millimetre of mercury, and inch of mercury are used to express pressures in terms of the height of column of a particular fluid in a manometer.

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  1. E

    Loss of Hot Water Pressure to Shower

    Looking for any ideas to help. I've a Heatrae Sadia Hot Water tank, heated through Oil fired boiler (working fine). A week ago I reset the air gap as I was having dripping from the pressure relief valve. Since then I've lost a lot of pressure from the hot water feed to my shower. The rest of...
  2. S

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  3. D

    Why does water pressure gradulally rise Valliant Ecotec 38

    Hi all, My pressure is stable at 1.5 when the boiler is off, but if I switch it on, the pressure rises as expected, but once switched off it will only drop back down to 1.6. This happens exach time the heating is switched on so eventually it gradually rises to above 2 bar and I have to drain...
  4. angy101

    Water Pressure Shower

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  5. W

    Low hot water pressure

    Low hot water pressure Hi everyone, I'm hoping someone is able to shed some light on my situation before I have to call out the professionals. We've been in our house for over 3 years now, when we moved in the hot water pressure was pretty good (confirmed by a retired plumber family friend)...
  6. P

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  7. P

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  8. B

    How to balance water pressure in taps

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  9. Abram R

    URGENT Low Hot Water Pressure (Heatslave 25/32 External)

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  10. A

    Low hot water pressure in entire house (Heatslave External 25/32)

    We have low hot water pressure in the entire house. Boiler is a Heatslave External 25/32, fuel in kerosene. The central heating is still working. Water initially heats up but soon flow ceases. The gauge pressure is correct. Do I need to release air or residue somewhere? Thank you.
    • Abram R
    • Thread
    • external hot water pressure water pressure
    • Replies: 0
    • Forum: DIY Plumbing Forum
  11. B

    PRV and water pressure query

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  12. H

    Constantly losing hot water pressure from Direct Vented Cylinder

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  13. V

    Bathtub mixer with thermostat- lost water pressure

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  14. C

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  15. R

    Boiler hot water issue & water pressure issue upstairs. please help!

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  16. Mandarin

    Low cold water pressure in only one part of the house :(

    This is doing my head in, so I am turning to the experts here for any wisdom... In the last couple of days I have very low cold water pressure in my downstairs utility room and downstairs bathroom (they back on to each other). The main cold feed (kitchen tap) is normal pressure. And all the...
  17. A

    Water pressure reduced when other appliances are on

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  18. C

    Water pressure for block of flats

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  19. J

    My boiler (label of Baxi) sent a 'low water pressure' warning 0.8 bar

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  20. G

    Water pressure suddenly dropped

    Recently we had reason to replace our boiler. It was on the blink and you could only con it into coming on by first turning on the hot water and then the heating. Whilst waiting for the installation one day randomly the electric shower stopped heating the water. It flashed low pressure -...
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