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expansion

  1. M

    Expansion Vessel leaking water - no air or water from Schrader valve?

    Hey, I've got a Grant Vortex that's leaking water from the seal around the expansion vessel - it's the round type about 50cm wide. The system is at 1.5 - 2 bar, but the expansion vessel has no air in it, and it's leaking water. No water is coming out of the Schrader valve either. The system...
  2. F

    Feed and expansion tank/cistern and few general system questions.

    Hi, I've got a leak coming from the loft into a bedroom which I think is caused by water overflow from feed and expansion cistern (see attached one of the photos when I found out the cistern overflowing above the overflow pipe) and one other pipe that has a small drops coming out of it that is...
  3. ollie74

    Boiler Expansion Vessel Question

    Hi, I have a Glow-Worm Easicom 28 boiler and i had to get a new 8 litre EV (expansion vessel) for it, which has arrived. i did check with the seller to ensure the new EV was correct for my boiler and he said it was. the query i have though is, on the original faulty EV, on the sticker, it says...
  4. Crossfingers

    Can a DIYer replace an expansion vessel

    Hi Is it possible for a DIYer to replace an expansion vessel and hose? It's an external grant vortex boiler and from what I've seen online it looks simple enough
  5. D

    Expansion tank location open vented Maxipod

    I'm about to start the plumbing of my house and wanting to use a maxipod with a oil fired boiler and a log stove. But its a single story house. Can i have my expansion tank below the flow and return pipes located in the ceiling? I've did a basic drawing below to show the layout.
  6. P

    Lining old joist notches to prevent expansion noise

    Has anyone tried lining joist notches with a low friction, high temperature resistant material to prevent the bangs when a pipe expands and momentarily sticks on the joist?
  7. R

    Overflow from Expansion tank Dripping

    I hope someone might explain to me why the overflow from the expansion tank drips in the morning for about an hour after the heating fires up, it then stops and does not drip again during the day. I have a fully pumped "Y" system as show on the accompanying drawing the dripping occurs on the...
  8. P

    URGENT Do I need a expansion vessel fitted to my system

    I have just had a water meter fitted and since been told I need a small expansion vessel fitted to my domestic hot water system as the meter will have a NRV in. I have also been told no I don't as my boiler is over 10meters away from the meter and any expansion will be taken up within the...
    • Paul Jay
    • Thread
    • expansion expansion vessel system vessel
    • Replies: 1
    • Forum: Central Heating Forum
  9. R

    Why do I have 2 Expansion Vessel

    I have Gledhill 300L unvented water cylinder storage system with Vaillant Boiler. We are using it for UFH and radiators. My plumber has fitted 2 expansion vessels 1) Zilmet - 18 Litre Red Heating Expansion Vessel & Sealed System 2) MULTIFUNCTIONAL TANKS WITH REPLACEABLE MEMBRANE Why has he...
    • Rahul Sood
    • Thread
    • expansion expansion vessel vessel
    • Replies: 3
    • Forum: Central Heating Forum
  10. M

    Expansion vessels and charges

    What causes an expansion vessel to loss it's charge and at what rate would you expect it too? Thanks
  11. M

    Expansion vessel hose

    Do many merchants sell 1 meter long 3/4 male to 3/4 female. The 3/4 male screws in to the composite valve and the other end the expansion vessel. I presume came supplied with the composite valve. The flexi is leaking.
  12. J

    Advice combi boiler plumber says can't fix expansion vessel/access it?

    Hi there, I was wondering if anyone could advise if I should get a different plumber for a 2nd opinion. Basically, my combi boiler is in my attic. It is overpressurised at the moment and the overflow pipe always drips. I had a plumber round, he seemed good and honest and knew the neighbour so...
  13. R

    Hot Water Tank Expansion Vessel Question

    Am I correct in saying that the capacity of an expansion vessel as written on the appliance data label is the capacity of the water compartment alone and excludes the air compartment capacity? Thanks
    • RayPooley
    • Thread
    • expansion expansion vessel hot water tank vessel water water tank
    • Replies: 18
    • Forum: UK Plumbers Forums
  14. C

    Expansion vessel for potable water for a combi boiler

    Hi,a customer of mine has a combi boiler and they don't have an expansion vessel for the potable hot water supply. I know there's an expansion vessel for the closed-loop central heating circuit but I doubt the combi boiler has one for the potable water. I was thinking to put one in the airing...
  15. M

    Pressure gauge showing zero on red expansion vessel

    New to this so please bear with me! The pressure gauge at the bottom of my red expansion tank is showing zero. However my radiators are getting hot and boiler seems to be operating okay. I did bleed a bathroom towel rail yesterday which only had heat at the very bottom. Not a massive amount...
    • Macca4
    • Thread
    • expansion expansion vessel pressure vessel
    • Replies: 2
    • Forum: UK Plumbers Forums
  16. N

    Ferolli expansion vessel

    I need a new expansion vessel, problem is I've got a optima 901 and the flue goes up about a foot and then into the back wall and the vessel is at the back, it's one of the round ones, I've got to get a engineer into do it, I'm assuming that they take the flue out and lift it from the back...
  17. C

    Expansion Vessel Pressure

    Hi, Should an expansion vessel pressure match the pressurisation unit? For example, if the pressurisation unit is set at 1.2 bar should the expansion vessel be set at 1.2? Many thanks
  18. K

    No water sound when turning filler tap by expansion vessel.

    Have an Ariston unvented hot water tank in airing cupboard with the red and white expansion vessels and a filler tap. As advised years ago on these forums when I hear that sound that the central heating water needs topping up I usually wait until cold so the gauge goes to zero and top up to 1...
  19. M

    Sizing expansion vessels

    Has anyone got a good rule of thumb for sizing an expansion vessel for a central heating system. A combi has a 8 litre vessel. And will deal with the expansion of say 8-10 rads. Could one use this as a ball park figure and multiply up from there Obviously pipe work to take in to account 22mm...
  20. H

    Pressure loss in Heating System post fitting new Expansion Tank

    Hi, hope someone can help me with a heating pressure loss problem. My valiant boiler has been loosing pressure over the last few months, resulting in me having to top up the water every week or so. Managed to get a boiler engineer to visit who diagnosed a faulty expansion tank. (Water evident at...
    • Hoppers
    • Thread
    • expansion fitting heating heating system pressure system tank
    • Replies: 26
    • Forum: UK Plumbers Forums

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