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Davidson's Mains is a former village and now a district in the north-west of Edinburgh, Scotland. It is adjacent to the districts of Barnton, Cramond, Silverknowes, Blackhall and Corbiehill/House O'Hill. It was absorbed into Edinburgh as part of the boundary changes in 1920 and is part of the EH4 postcode area.
Locals sometimes abbreviate the name to D'Mains.

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  1. C

    Mains high pressure

    Has anyone come across extremely mains high pressure in a domestic property ?..? I used 2 gauges one at 6 bar and other at 10 bar both were off scale when static. I was shocked at the readings. Have since fitted PRV. Just seeing if people have experienced the same.
    • Clint B
    • Thread
    • america high high pressure mains pressure usa
    • Replies: 6
    • Forum: USA
  2. R

    Mains Water Treatment Question

    Hi, new to the forum, found you because I have a question! Partner wants us to install an alkaline water system in the kitchen, something like this, but I'm doubtful of any positive effects. Was thinking maybe to appease I could get a UV disinfection system like this, but can't figure out if...
  3. B

    Does an unvented cylinder really have to be connected to the mains?

    This is my first post on the forum... but I've been around a while, lurking. Hello! I'm hoping someone can advise me with a question about unvented cylinders. I'm told they must be connected to the mains and can't be gravity fed, but I'm having trouble understanding why... if the pressure and...
    • Benjy
    • Thread
    • america connected cylinder mains really unvented unvented cylinder usa
    • Replies: 11
    • Forum: USA
  4. topalondon

    Leaking ball valve from outside mains

    I have a Plimex ball valve that is the inside stop tap for the mains supply that has recently started leaking. It’s only 2 years old (when property was renovated) and suspect it could be due to thermal cycling with the cold weather. Access is restricted as the pipe work was put behind a plywood...
    • topalondon
    • Thread
    • america ball valve leaking mains outside usa valve
    • Replies: 8
    • Forum: USA
  5. K

    Leaking mains stopcock

    The internal stopcock was closed for the first time in about a year as part of a bathroom installation. Now that it's open (I leave it a quarter turn from fully open) it has a slight leak, approx half an egg cup full in 24 hours. Should I get it replaced? Thanks in advance.
    • keith2511
    • Thread
    • america leaking mains stop cock stopcock usa
    • Replies: 2
    • Forum: USA
  6. D

    High pitched note from mains water pipes

    I have a flat in a 1920s UK block. The mains water feeds ~40 flats, of which I am one. There is no local boiler, though there is a communal one for the whole building. Recently, always at night, the mains water pipes have started to vibrate at a high frequency - emitting a "singing" note ...
    • dbrb2
    • Thread
    • america high mains pipes usa water water pipes
    • Replies: 1
    • Forum: USA
  7. S

    Mains Pressure Tap above Consumer Units OK? UK Law *See Photo*

    I would like a professional plumber's advice on this attached image, which shows a mains pressure pipe with tap located above the consumer units. Is this ok for the legal requirements in the UK? Can someone let me know what the law is on this matter please? have a link? Thanks all.
    • spinner121
    • Thread
    • above america consumer fuse law mains photo pressure tap units usa
    • Replies: 5
    • Forum: USA
  8. P

    Why is my mains water PRV not maintaining 3 bar?

    Hi all, I had a problem recently with the pressure to the house exceeding the 3 bar that the caleffi pressure regulator was set to. The gauge on it indicated that static pressure would sometimes increase to 6 bar; it's not just a gauging issue because the HW cylinder next to it starts leaking...
    • PeteCUK
    • Thread
    • america bar mains prv usa water
    • Replies: 27
    • Forum: USA
  9. DripsnDropsBognor

    Materials for back filling water mains trench?

    Hi Boys and Girls, I am splitting currently supply inside into 4 and upgrading old 1/2 galvanized supply from the street into building without breaking pavement into waterboard stopcock. I am using a moling company to bore pipe in through a trench I have dug out. I have agreed to make good hole...
    • DripsnDropsBognor
    • Thread
    • america filling mains management materials usa water water mains
    • Replies: 3
    • Forum: USA
  10. S

    change to 22mm pipe from mains?

    I live in a maisonette and there is a single pipe that comes in from the street for both flats. The pipe that enters the building is lead, probably 3/4, and is changed to 15mm copper pipe with an stopcock. This goes on for about 5-10m where it splits to both flats. Generally, water pressue is...
    • SQUIRMSTER
    • Thread
    • 22mm america change mains pipe usa
    • Replies: 2
    • Forum: USA
  11. D

    Old Welded Mains stopcock leaking

    Looking at the picture attached would you say that this old stop tap can be taken apart and the washer replaced rather than making the job more complicated than it need be. It looks like a really old type of stop tap situated under the kitchen sink flat to the wall with no space around it to...
    • Diezeltruck
    • Thread
    • america leaking mains old stop cock stopcock usa
    • Replies: 7
    • Forum: USA
  12. O

    Loss off water pressure after mains scale inhibitor fitted

    Hi all, i have fitted a 22mm scale inhibitor today( due to very hard water) and have lost pressure to all the cold taps in my property bar the outside tap and the washer valve feed . I have also lost around 4L a minute on the flow rate on all the affected taps . Property is a new build MDPE...
    • Oscar F
    • Thread
    • after america fitted inhibitor mains pressure scale scale inhibitor usa water water pressure
    • Replies: 0
    • Forum: USA
  13. S

    No pressure to mains water meter

    We’ve purchased a 1920’s bungalow that’s been unoccupied for a long time. I’m in the process of trying to sort the water supply at the moment. The water meter was submerged and when drained would quickly fill up again, we had south west water take a look, they said it was a leak on the service...
    • scott farrell
    • Thread
    • mains meter no pressure pressure water water meter
    • Replies: 6
    • Forum: USA
  14. J

    Why would cold mains feeding the boiler need an expansion vessel?

    British gas fixed a leak in the boiler and said the due to the recently installed water meter the fluxuation in pressure caused the leak. They advised to get a expansion vessel on the the cold mains entering the boiler. I read on here someone say that Worcester wouldn't warranty boilers being...
    • Joef
    • Thread
    • america boiler cold cold water expansion expansion vessel feeding main mains usa vessel water
    • Replies: 5
    • Forum: USA
  15. Andrew Stride

    An old mains stopcock on an 30mm pipe needs replacing, please help.

    I need to replace the stopcock on an old mains water pipe. The house is about 60 years old, the pipes OD is 30mm, my local plum centre said they had no parts available to do this. The old stopcock is leaking and seized solid. Any advice about where I can get the parts to fix the problem would...
    • Andrew Stride
    • Thread
    • america correct help mains needs old pipe please replacing size still stopcock urgent usa water
    • Replies: 4
    • Forum: USA
  16. R

    Wanted plumber to install new water mains

    I'm putting in a new rising main to my 1st floor flat. The pipe work is to run on the outside of the building in Insuduct. The water board will put in a new connection to the property boundary then a 750mm deep trench has to be dug to the Water Boards spec to the property (approx. 3m. long). I...
  17. deFoix

    Regular momentary dips in mains water pressure every 15sec

    Hi all, hoping for some help here. Over the last 2 months I've been experiencing dips in water pressure from my kitchen tap. The weird this is that these are momentary dips in pressure that occur every 15 seconds. It seems to happen in the mornings and evenings and is making my plastic pipes to...
    • deFoix
    • Thread
    • america every mains mains water pressure pressure regular usa water water pressure
    • Replies: 8
    • Forum: USA
  18. D

    want to fit tmv2 but supples to basin taps not balanced pressures

    have gravity hot, mains cold to basin taps,require to fit a tmv2 anything i can fit to avoid trying to get gravity cold to taps to balance
    • drainrod
    • Thread
    • balanced basin cold cold water fed gravity hot water mains pressures safe taps water
    • Replies: 6
    • Forum: Australia
  19. Stefromthewirral

    Double Check Valve on incoming mains

    Hi all, I have two questions that I'm looking for advice on please? 1. I've been asked to fit a double check valve on a new incoming main. I only did my water regs last year and this wasn't stipulated in the reg's? Has this now changed or did miss something? The property in Cheshire. The main's...
  20. M

    Noisy mains (like hammer)

    Hi guys/girls , can any body help? , i have a loud water hammer noise ,(like a fog horn) mainly at night,( when nothing is on) (and normally occurs twice within 30 seconds of each time) i have ;;; turned heating off , reduced pressure/ increased pressure, i have checked and replaced ball cocks...
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