Your browser isn't supported
It looks like you're using an old web browser. To get the most out of the site and to ensure guides display correctly, we suggest upgrading your browser now. Download the latest:

Welcome to the MSE Forums

We're home to a fantastic community of MoneySavers but anyone can post. Please exercise caution & report spam, illegal, offensive or libellous posts/messages: click "report" or email forumteam@. Skimlinks & other affiliated links are turned on

Search
  • FIRST POST
    • richdeniro
    • By richdeniro 6th Dec 17, 7:35 PM
    • 274Posts
    • 166Thanks
    richdeniro
    Plumbing Query - Flexi Filling Loop
    • #1
    • 6th Dec 17, 7:35 PM
    Plumbing Query - Flexi Filling Loop 6th Dec 17 at 7:35 PM
    Hi All,

    Today was sat at home and heard a pop from the kitchen, went in there and had water gushing everywhere from a burst on the flexible hose thing that connects the water supply to the boiler via the filling loop.

    Managed to turn off the water at the mains after a couple of minutes as Thames have just fitted a water meter so for some reason I now have two stopcocks, one above the meter and one below (should they have installed it this way?). The damage wasn't too bad but a fair bit leaked down to the flat below.

    I bought a new flexi and fitted it myself, turned the water back on and everything seems ok but am now really paranoid that it might happen again and it would be a disaster if I hadn't been at home, I've never seen so much water from a 2 minute leak and if it happened when I'd been out no one might have gotten to it for hours.

    Have been googling and came across something called a 'Flood Stop Isolating Valve' and wondered if anyone knew if something like this would stop any future leak if the flexi hose failed again? Also would it be something I could install myself or should I pay to have a plumber install it and how much would that cost?

    Cheers,

    Rich.
Page 1
    • flashg67
    • By flashg67 6th Dec 17, 8:00 PM
    • 2,302 Posts
    • 1,508 Thanks
    flashg67
    • #2
    • 6th Dec 17, 8:00 PM
    • #2
    • 6th Dec 17, 8:00 PM
    Yours may be different, but at each end of my fill in loop, there is a tap/valve to control the flow when filling the boiler - so it's already able to be isolated - I just leave them both off unless/until I need to use it.
    • richdeniro
    • By richdeniro 6th Dec 17, 8:11 PM
    • 274 Posts
    • 166 Thanks
    richdeniro
    • #3
    • 6th Dec 17, 8:11 PM
    • #3
    • 6th Dec 17, 8:11 PM
    Yours may be different, but at each end of my fill in loop, there is a tap/valve to control the flow when filling the boiler - so it's already able to be isolated - I just leave them both off unless/until I need to use it.
    Originally posted by flashg67
    Yep there's one on the end that feeds from the water supply and it was the first thing I turned when the leak happened but it didn't stop the flow of water, had to go downstairs and turn it off at the mains.

    I'm wondering if that might have been because when Thames water fitted the water meters they left the pressure on the stopcock on full? I've only turned it on slightly now from the mains so perhaps that would work.
    • Alex1983
    • By Alex1983 6th Dec 17, 8:23 PM
    • 675 Posts
    • 380 Thanks
    Alex1983
    • #4
    • 6th Dec 17, 8:23 PM
    • #4
    • 6th Dec 17, 8:23 PM
    Filling loops shouldn’t be permanently connected, the hose should be removed and the isolation taps capped when not required.
    • Ectophile
    • By Ectophile 6th Dec 17, 9:10 PM
    • 2,830 Posts
    • 1,744 Thanks
    Ectophile
    • #5
    • 6th Dec 17, 9:10 PM
    • #5
    • 6th Dec 17, 9:10 PM
    Filling loops shouldn’t be permanently connected, the hose should be removed and the isolation taps capped when not required.
    Originally posted by Alex1983
    But nobody ever does.

    However, the valves at both ends of the pipe should have been turned off. They shouldn't be turned on unless you are actually filling the system. The reason for this is water safety. When the heating is on, the system pressurises. If the valves aren't turned off properly, this can force water out of the heating system back into the mains. Anyone drinking that water could be drinking rust and corrosion inhibitor.
    Last edited by Ectophile; 06-12-2017 at 9:12 PM. Reason: Added last bit
    If it sticks, force it.
    If it breaks, well it wasn't working right anyway.
    • richdeniro
    • By richdeniro 6th Dec 17, 9:32 PM
    • 274 Posts
    • 166 Thanks
    richdeniro
    • #6
    • 6th Dec 17, 9:32 PM
    • #6
    • 6th Dec 17, 9:32 PM
    There only seems to be one valve at the bottom, if I turn it clockwise the pressure guage increases. Also the pipe that it feeds into on the bottom right (labelled as 'CH return') has hot water flowing through (whilst the heating is on) it now when this is where the cold water was coming from when the leak happened and it stopped when I turned the water off at the mains.

    Last edited by richdeniro; 06-12-2017 at 9:50 PM.
    • Le_Kirk
    • By Le_Kirk 7th Dec 17, 10:34 AM
    • 2,226 Posts
    • 1,133 Thanks
    Le_Kirk
    • #7
    • 7th Dec 17, 10:34 AM
    • #7
    • 7th Dec 17, 10:34 AM
    The bottom tap is in the off position, if you turn it, it will try to put more water in the boiler and so the pressure will increase as witnessed by the pressure gauge increasing. You don't appear to have a valve/tap at the top of the filling loop, nor do you seem to have a non-return valve, which would have prevented water coming out of the boiler.
    • barnaclebill
    • By barnaclebill 7th Dec 17, 12:14 PM
    • 245 Posts
    • 128 Thanks
    barnaclebill
    • #8
    • 7th Dec 17, 12:14 PM
    • #8
    • 7th Dec 17, 12:14 PM
    Looking at the photo it looks to me that there is something on the top connection with a hex cap, could be a non return valve inside that has stuck open.
    • richdeniro
    • By richdeniro 7th Dec 17, 2:02 PM
    • 274 Posts
    • 166 Thanks
    richdeniro
    • #9
    • 7th Dec 17, 2:02 PM
    • #9
    • 7th Dec 17, 2:02 PM
    I've got a plumber coming round in a couple of hours. Better safe than sorry.
    • Norman Castle
    • By Norman Castle 7th Dec 17, 2:21 PM
    • 6,409 Posts
    • 5,185 Thanks
    Norman Castle
    I now have two stopcocks, one above the meter and one below (should they have installed it this way?)
    Yes. No reason not to and it makes meter replacement easy (assuming a !!!!!!!! plumber doesn't cut the handle off the first stop tap for the kitchen fitters!).
    Last edited by Norman Castle; 07-12-2017 at 2:24 PM.
    Don't harass a hippie. You'll get bad karma.
    • Head The Ball
    • By Head The Ball 7th Dec 17, 2:26 PM
    • 2,980 Posts
    • 6,860 Thanks
    Head The Ball
    ...I'm wondering if that might have been because when Thames water fitted the water meters they left the pressure on the stopcock on full? I've only turned it on slightly now from the mains so perhaps that would work.
    Originally posted by richdeniro
    The stopcock does not affect the water pressure, it only affects the flow rate, from zero when fully closed to full flow when fully open. The pressure will be the same no matter the flow rate.

    Pressure is determined by the pressure of the water in the mains feed into your house.

    The stopcock should normally be turned fully on, otherwise you may have restricted flow at your taps. (It is a good idea to open it fully and then close it fractionally by a tiny amount as that reduces the chances of it sticking or seizing open. Open and close it occasionally, twice a year maybe, to reduce this risk.

    If your mains is at too high a pressure, (that might have caused the burst in the hose) you can fit a pressure limiting valve like these.

    Speak to your plumber about this.
    Last edited by Head The Ball; 07-12-2017 at 2:43 PM.
    Who'll remember the ones
    who only rode in them to die
    All their lives are just a smudge
    of smoke against the sky
Welcome to our new Forum!

Our aim is to save you money quickly and easily. We hope you like it!

Forum Team Contact us

Live Stats

1,677Posts Today

7,134Users online

Martin's Twitter