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mains

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  1. M

    Breaker tanks for booster mains

    I have to quote to fit a breaker tank and booster set for the incoming main on a block of flats. What is the procedure or requirements for cleaning/chlorination of the tank once installed? Are there any regs to read up on for this? With it being drinking water I want to make sure I get it right...
  2. D

    Kitchen Cold tap not supplied by cold mains?

    Hi There Moved into a new build recently. Noticed that when I turn on the cold tap in the kitchen a pump in the attic seems to activate which would indicate that the cold tap in the kitchen is not fed directly by mains (however i am not a plumber so could be wrong) Prior to noticing this pump...
    • Deleted member 113144
    • Thread
    • cold kitchen mains
    • Replies: 9
    • Forum: UK Plumbers Forums
  3. Lambed84

    Mains pressure issues

    Hi all. I've inherited a job that's the customer has spent a small fortune on and needs rectifying. So the layout is as follows. System boiler. Unvented cylinder. Mains static 1.5bar Dynamic 0.5bar Flow rate 8LPM 5 mixer showers, 4 of them ensuite. 1 bath. Secondary return. Issue is they...
  4. I

    Advice needed. Converting gravity fed cold supply to mains fed to supply an electric shower?

    I want to put in an electric shower in my downstairs cloakroom which currently has a gravity fed cold supply from the tank in the loft. The shower I am looking to install needs a mains fed cold supply which I could do by disconnecting this pipework from the gravity tank and connecting the cold...
  5. J

    Water mains

    Hi, had a look at the water mains on a new build. It's in a rural area, private water scheme. I'm trying to figure out if the supply will be enough There's 1/2" hydrodare, it gives 1.8 bar of pressure and 15 litres of water per minute. I know on my own house the static pressure is 4 bar and it...
  6. T

    replace thermostatic mixer shower valve (mains pressure unvented system boiler system)

    With a thermostatic mixer showers, can you replace the unit, in a mains pressure unvented system boiler configuration, by just turning the cold mains off at the stopcock when the water supply enters the property? Will the hot and cold water stop flowing if you turn the mains water off?
    • Topslice
    • Thread
    • boiler mains mixer pressure replace shower system thermostatic unvented valve
    • Replies: 2
    • Forum: Boilers
  7. W

    Mains tap won’t turn off.

    I am unable to turn off the mains stopcock inside our house.The tap appears to be off but water still comes out of the taps in the house.We don’t have a leak but are concerned if we have an issue we will be in big trouble.We’ve never had this issue before and stopcock has always worked before.I...
  8. Michael Groves

    Mains Pressure Hot water System - Brown Sludge

    I got a Mains Pressure Hot water System, it's about 3 years old. The shower filters get blocked yearly, and if it gets drained for maintenance, when you purge the system, you get loads of brown sludge. This is on the hot water side only. How can I prevent this brown sludge build-up, and how can...
  9. S

    Mains Gas Supply Pipe Repair

    I was using a mini excavator in the front garden and cut the mains gas supply (website with gas location had it in the wrong place, but a disclaimer saying their info might be inaccurate - the engineer said it was probably moved when they changed the pipe to the new plastic sort). 1 Cadent...
  10. E

    Intermittent Pressure from Mains

    Strange problem but over the last few weeks we've started getting really unusual water pressure problems through-out the house. One minute, we have full pressure on all taps and the next, either low pressure or no water at all. Today for example, at about 1pm, we had no water anywhere in the...
  11. M

    Crazy high mains pressure

    Hi to all in the forum! I have a 6 bar pressure relief valve attached to an under sink heater and it was always dribbling a bit. Today, I finally bought a new pressure gauge and was astounded to measure the pressure at 7 bar! I usually find most mains to be between 2-3 bar and so it seems...
  12. L

    Non return valve to mains supply

    Hi Guys. I will be fitting an outside tap in my house. Teeing off under sink and direct to outside. Should i install a non return valve on mains ?
  13. A

    Routing mains water pipe under the floor?!?

    Hi, I have my mains pipe coming into the side of my house which is copper. I am going to have the adjacent wall studded out (to the left in pic) and therefore want to hide the mains pipe behind it and put on a low profile stop tap in which can be accessible via a flap or something. There is an...
  14. C

    Mains HE boiler help

    Hi, I’m struggling to locate the stopcock in my flat and I need to isolate the boiler so I can swap a bath tap over. Can I isolate it from the water feed on one of the inlets on my boiler? I’ve attached a pic. It’s a Main Combi 24 HE. All my cold taps can be isolated individually but my hot...
  15. D

    mains water pipe be run through an integral garage?

    Can a mains water pipe be run through an integral garage? It's to feed a washing machine used 2-3 times a week. Is there a risk of the pipes freezing?
  16. T

    Mains cold water knocking out gravity hot water in bath shower mixer

    Hi all. My customer has a bath shower mixer that gets cold from the mains and hot from a vented cylinder and the cold knocks out the hot. I'm thinking about putting in a thermostatic bath shower mixer but would appreciate any other ideas! Cheers all/
  17. B

    Is powerflush really any better than chemical plus mains flush? (before boiler repair)

    Hello, BEFORE I cleaned the system last year with a mains flush. There was a little inky stuff and a bit of sludge at the very end when I emptied out the rad I took off the wall, but no rads have ever had cold patches. Most pipes are hep20 but I had small section replaced by copper 2 years ago...
  18. Stants

    Mains uprating is 32 mm that much better than 25 mm

    Hi sorry if this is a silly question I'm having a new heating system installed ( un vented ) my new mains is due to be installed ( moled ) in 25 mm MDPE , the Water companies going to replace the communication pipe under the lead replacement scheme , however its been suggested to me to...
  19. A

    Top floor Flat - Mains Booster advice

    Hi All, I have a GrundFos Home Booster, the 3.5bar version which has transformed my flat, its used for every tap aside from the kitchen cold tap and the kitchen white goods that need mains, it also supplies the pressure for my combi boiler that is the hot water and central heating system. I...
  20. JLS

    Mains Inlet through loft

    Was asked to look at a Mains inlet today that the property owner wants moving. It currently comes into the hall in black HDPE , through a concrete slab and about 6 inches up the wall in copper, then poly up the wall and through the unheated loft space. It's not pretty, but at least whoever...
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