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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. A

    What amount of water pressure comes through a normal house ?

    Every time I use a stop end when I turn the water back on I think to my self that’s going to pop off and flood the house. What amount of pressure can they with stand ?
  2. N

    Digital or electric shower

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  3. D

    Mains Water Pressure Advice

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  4. A

    Replacement shower valve reduced water pressure -need to replace again

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  5. J

    Installed Unvented cylinder will cause water pressure high?

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  6. R

    Combi Boiler Low hot water pressure

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  7. K

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  8. S

    Oil boiler in low water pressure location. Pump problem.

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  9. P

    Water pressure

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  10. K

    Hot water pressure- strange storage tank

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  11. A

    Very low hot water pressure in shower

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  12. P

    Best option to reduce high water pressure - plumber and PRVs vs. water company?

    Hi (again!) Following on from this thread.... https://www.plumbersforums.net/threads/under-pressure-dum-d-d-dum-dum-options-for-high-water-pressure.122904/ I hope you don't mind but I thought I'd start a new one as Dwr Cymru could turn up next week so really want to decide what's best and...
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  13. A

    Intec 34c hot water pressure low but boiler isn't.

    Hi everyone, I've got a strange one. My boiler (intec 34c combi) has good pressure (high end of green). When I open a hot water tap, the boiler fires up fine but it's just a trickle that comes out the tap. The water does get really hot though. My boiler is placed over an alpha flowsmart 50...
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  14. L

    Hot water pressure

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  15. P

    Under pressure dum d-d-dum dum... Options for high water pressure?

    Hi all I've got a lot of plumbing work coming up in the house soon and had a plumber visit yesterday to quote. Whilst here he checked the water pressure and said it is one of the highest he has seen, at 8 bar. I've roughly calculated the flow rate before and it came out at 30L per minute...
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  16. J

    Low water pressure

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  17. G

    Fluctuation in water pressure with electric shower since neighbours extension built

    I have an electric shower which worked perfectly until my neighbours built an extension. Since then my water pressure is constantly fluctuating which has caused problems with the shower. The temperature of the water can be perfect initially but will suddenly change and I’ll either be almost...
  18. H

    water pressure and flow..what's the ideal combination

    Water pressure static is 8bar. Working pressure (if that's the term) is 6bar. Flow rate from cold water is 28-29L/min. Now this seems good (to me) but reading some suggested figures for ratings at different outlets, my readings seem almost dangerous by comparison. What should I be aiming for to...
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  19. I

    Low hot water pressure

    Hello people I've posted about this before but can't get in to the thread to view the answers I had a mains eco lite 35 boiler installed in my property. Since having the boiler installed the hot water pressure has significantly reduced! Previously had a glow worm combi boiler and the...
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  20. D

    Low water pressure

    Hope you can help as I've not managed to find an available plumber yet. I live in a property with low mains water pressure - measured crudely at around 10ltr/min but I'm convinced it drops below this much of the time. We cannot use our electric shower at the moment due to low pressure - been...
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