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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. S

    Water pressure and combi boiler query

    Hi i was wondering if you guys can help....currently I have a 3 bar water pumped fitted and from what I've been told I also have a combi boiler....I think I remember hearing from someone a while back that you can't have a water pump if you get a combi boiler installed...is this correct? Before...
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    • Forum: Plumbing Jobs | The Job-board
  2. S

    unvented cylinder hot water pressure

    i hope someone can give me an advise on the issue that I'm currently facing, my property is a new build and its just 3 years old, the house came fitted with megaflow eco solar 300si, its an unvented cylinder which works with both boiler and solar panel. The issue that I'm facing is the hot...
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    • Forum: Plumbing Jobs | The Job-board
  3. L

    Water Pressure Gauges - advice

    Hi I need to measure my water pressure in my bathroom, and am wondering if there is a type of gauge that fits directly to a bath or basin tap? I can only see ones that screw on to a washing machine tap, and I can't find a tap with a thread on it that relates to the bathroom cold water supply...
  4. D

    Low hot water pressure - Firebird oil

    I have an old Firebird oil boiler (cant find the number) that works fine until the water pipes 'clonk' and then the hot water pressure drops. I switch the tap off and on again it works for a while until the 'clonk'. The cold water pressure is fairly high (normal) but when I reduce it to stop the...
  5. D

    Variable water pressure on 3rd floor block of flats (built 2003)

    Hi...can you give me some advice please?. I have lived here for about a year and for the last month only have had severe problems with water pressure ,even the toilet cistern (ALL my water is fed from the mains and not from a tank). In a split second my pressure can go from strong to weak...and...
  6. L

    Water pressure adjusted but still problems.

    Hi, trying again now i have registered! This morning there was no hot water upstairs, but, there was downstairs. I had a look at the boiler and the water pressure was almost 0. After much tinkering and googling I have managed to reset the water pressure. I have an old Worcester Bosch boiler...
  7. U

    Adjusted Water Pressure but Still Waster Problems

    Hi, I am hoping someone can advise. This morning there was no hot water upstairs, but, there was downstairs. I had a look at the boiler and the water pressure was almost 0. After much tinkering and googling I have managed to reset the water pressure. I have an old Worcester Bosch boiler. So...
  8. R

    LVariable water pressure from mains, PRV on shower feed not performing as expected

    Hi, looking for some advice on what to do about my variable water pressure. I have recently had a new boiler fitted, it's a combi boiler fitted by British gas, the old boiler was a hot water tank and gravity feed system. Once the new system was fitted I noticed that the hot water flow was...
  9. H

    Hot water pressure issue, boiler shutting off when mixing cold water in

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  10. U

    Low hot water pressure, boiler cutting out when mixing

    Hi all, I am at a complete loss. I have lived in my flat for 2 years, it is on the third floor of a 4 floor block containing a total of 13 flats and my water pressure has always been low, since day 1 of moving in i have not been able to have a shower without the hot water cutting out and...
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    • Forum: Plumbing Jobs | The Job-board
  11. O

    Low water pressure

    Hello all engineers a customer of mine called me about low pressure and not mixing really hot water with cold water. i have checked the mixer and mixer was faulty as the quater turn were gone ... but it it didn't really help to increase cold water pressure neither the proper mixing. i have...
  12. E

    Pressure Reducing Valve limiting mains water pressure why?

    Hello, I was hoping someone could answer a query that has puzzled me for a while and nobody has been able to help all that much. I have a new mains water supply coming into the basement which has replaced the old lead version. This new connection is instantly greeted by a pressure reducing...
    • ecswtrav
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  13. B

    Hot water pressure - pump or raise header tank?

    I live in a modern top (third) floor flat in an all electric building. Heating is night storage and hot water provided by a vented 130 litre cylinder with immersion heater located in the hall cupboard. Shower is electric through flow above the bath direct off the mains which works OK. Hot is...
  14. M

    Water pressure and flow rate?

    Hi all. Out of about 80 boilers I helped install with my previous colleague, not once did we check mains water pressure or flow rate. Do most of you guys actually check this when quoting a job or on installing a boiler to make sure the boiler will operate effectively? Or do you just open up the...
  15. R

    Water pressure advise please!

    Hi - looking for a little advise on water pressure, I'm plumbing in a coffee machine that requires a minimum of 2.5bar (preferably 3!) into the tank, I live in a 3rd floor apartment and am taking the cold feed off the kitchen tap supply so aware of both height issues and the fact its running off...
  16. A

    water pressure

    Hi guys im over from the sparks forum to just ask a question thats been bothering me... In my house when we open the kitchen tap hot, the water pressure in the bathroom taps and shower becomes so bad. I have a Worcester boiler and its a flat no gravity system here obviously. Im not looking to...
  17. P

    Water Pressure

    Dear Plumbers of the United Kingdom, I humbly throw myself at your feet and wish for your collective intelligence. Please go easy on me, I am not a plumber nor will profess to be, I am here to get advice in the hope of not getting seen off. I have a gravity fed system in my 4 bed detached...
  18. P

    help needed please hot water pressure very low

    hello could someone give me some advice please i have just installed new sink taps kitchen and new basin taps for bathroom for a cousin they live on a ( chalet site ) the cold water pressure is very good so good i have only turned a little on but the hot water taps are very poor the water...
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    • Forum: Plumbing Jobs | The Job-board
  19. jaydebruyne

    Weird Water Pressure on Mains

    I went to a job today of a lady complaining about the hot and cold water pressure.. She said every now and then both hot and cold stops completely then comes back on. Naturally I think it's a gravity system and either a ballvalve issue or an air lock of some sort, or maybe a pump. I get there...
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