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mains

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. finchy01

    2 questions.

    1) And I'm embarrassed to ask this but, what's the simpletons way of defining pressure and flow rate. Because I have a job with poor flow rate which gets a lot worse when 2 or more outlets opened but 3bar (it's an unvented system so I was surprised at the poor flow rate) 2) I'm getting 16ltrs...
  2. M

    Low water pressure at electric shower.

    Had an electric shower problem, turned out to be low mains water pressure coming in to shower. Kitchen tap water pressure is fine, bathroom cold tap water pressure seems low but better than the shower. Haven't yet confirmed if bathroom cold taps are mains or tank fed. All pipes are boxed in...
  3. Super Mario

    New water meter fitted now got loud noise from mains pipe?

    Makin loud intermittent noise since new meter fitted Does it need an expansion vessel?
  4. Savva

    Mains water getting hot when CH is on! What the heck is that about?

    I went to do a safety cert the other day on a Main 30kw Combi. When I called for heat, as well as the F&R pipes heating up, so did the mains supply pipe to the boiler! Had a quick look and the further from the boiler the cooler the pipe...any ideas what's causing this? Thanks guys
  5. U

    unvented cylinder 20/l min mains

    We are a 4 bed house. Not wanting a combo as had previously and the drop in pressure when switching taps on was annoying. We want to fit an unvented cylinder with 20/l min mains pressure. Will the pressure be ok (I don't expect it to beat down on me!) and will it run two showers simultaneously...
  6. S

    High pressure in heating system and constantly filling

    Hello, Around 3-4 weeks ago I noticed the TPV overflow pipe at the back of the house was dripping and the system pressure had increased to 3 bar. I bled the radiators (no trapped air) and then ran off some water from a downstairs radiator. Initially this did the trick and the pressure dropped...
    • Si_99
    • Thread
    • constantly filling heating heating system high high pressure mains pressure problem system water
    • Replies: 15
    • Forum: Plumbing Jobs | The Job-board
  7. Savva

    Mains Water pipe getting hot!

    I went to do a safety cert the other day on a Main 30kw Combi. When I called for heat, as well as the F&R heating up, so did the mains supply pipe to the boiler! Had a quick look and the further from the boiler the cooler the pipe...any ideas what's causing this? Thanks guys
  8. S

    Leaking Mains Water

    Hoping someone can suggest a workaround for this problem. I have a leaking tap which is connected directly to the mains supply (just moved in to a new house) and I want to try and get it sorted as an outside water supply. Trouble is we live 800+ metres from the mains cut off and I'm on a water...
  9. F

    Unvented - how many showers/performance?

    I have a megaflo unvented cylinder which feeds 3 bathrooms. In particular, it feeds 3 showers which have pura thermostatic valves: http://www.purabathrooms.co.uk/catalog/index.php?route=product/product/datasheet&product_id=24158 The MI state the valve uses 32 litres/min at 3 bar. Two of my...
  10. T

    90mm water mains

    The job im on at the minute has had a 90mm water mains run into the building which I need to put a stop tap and double check valve on for water board to inspect and then connect up. Its massively oversized for what its serving, 32mm would have been plenty. The biggest mdpe ive ever...
  11. D

    Unresponsive boiler

    Hi all, first time poster hoping for a bit of advice. Amateur so please bear with me! I have an Ariston e combi evo boiler which was fitted just last year. Woke up this morning to find no hot water in my flat. Checked the boiler to find not only was it not lighting but the screen was totally...
  12. A

    Mains water filter

    Can anyone recommend one? Inline would be preferable.
  13. eagleeye

    mains booster pump

    We installed a combi boiler on the 4th floor of an old block of flats a while ago and noticed the mains water pressure was extremely low. When we filled up heating we could only get it up to 0.7 bar. So you can imagine what the hot water is like once it goes through plate exchanger. Landlord now...
  14. O

    Bath mixer issue

    Hello all looking for a little help. I have this simple bath mixer and one issue is the hot is on the right hand site which I could change. But the issue really is, the cold water pressure ( tank feed)is weak much weaker than the hot water. The mixer does not mix it is either hot or its going...
  15. G

    Running a second boilerfrom same water supply

    Hello all, new to the site and hoping I can get some help while I do my extension. I'm currently in the process of building an extension on the side of my house (joined to current property) I've built a sort of granny annexe with a kitchen bathroom and livingroom/Bedroom. I'm planning on...
  16. T

    Legal pump on mains?

    I live in a block of flats. We have excellent (turn the taps on and stand back excellent!) cold mains direct into each property, no tanks in lofts etc. The hot is supplied via a copper immersion cylinder in each flat - the pressure being from a small header tank atop the hot tank. Hot pressure...
  17. C

    Mains water instead of cold tank to power shower

    Hi all, I am not a plumber, I just come here for advice and tips as a customer of professional plumbers. I need to replace my power shower unit, but upon investigation it seems that my power shower was plumbed with the cold feed coming from the mains opposed to the cold water tank. Am I right...
  18. M

    water storage tank

    hi I'm looking for some inspiration for a new house I am building.. basically the house is quite rural and high up in the mountains, hence water pressure isn't great at the best of times. on top of that it can go off completely frequently enough to be an issue with 2 young kids in the house...
  19. B

    Mains static pressure off the scale!!

    Hi everyone, I'm new here and would love some advice regarding my mains connection. I'm near completing my barn conversion, and this morning filled up my system (thermal store,rads,ufh etc)with the help of my plumber(who is now gone and unavailable to ask for advice!). I fitted a new prv just...
  20. L

    General plumbing query

    I've recently done a mock test for a plumbing exam and wasnt happy with some of the answers given by the tutors, can any of you more knowledgeable plumbers give me your opinions on the following: 1.what is required soundness test pressure for hot water pipework which is normally subject to...
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