Welcome to the forum. Although you can post in any forum, the USA forum is here in case of local regs or laws

unvented cylinder

  1. C

    Descaling unvented cylinder

    Hia guys I have a 300l unvented hot water cylinder not getting up to temperature. Primary Flow into the coilis coming in at approx 70deg but water temperature is not getting above 40deg. Cylinder is over 10years no scale reduction so Im guessing the coil is scaled or sediment build up is...
  2. T

    Heatrae Sadia unvented cylinder & Tundish

    Hi All I have a Heatrae Sadia unvented cylinder... with the usual PVR on the side... which discharges to a tundish which is then connected to a 'fanny trap'. The problem - Water trickles through the tundish after about an hour or so of the hot water being heated and the pressure rises. It's...
  3. T

    Unvented cylinder size

    Hiya guys I currently specing a job for a 5 bedroom house with x5 ensuites. Could anyone advise me on sizing cals for unvented cylinders. Thank you
  4. L

    Unvented Cylinder Query

    I’ve recently moved into a property which currently has a combi boiler, two bathrooms, one power shower and one electric shower. I’m wanting to change this out for an unvented system with two showers operating from the cylinder. Both showers would run at 20 LPM. My current water supply is 15MM...
  5. C

    Tempest Unvented Cylinder - Immersion Heater?

    Evening all, We have had a Tempest 250l unvented cylinder for just under a year which runs in connection with a boiler. It is scheduled to come one once a day (6am) for 1hr and it provides the house with hot water for the rest of the day. I have read on some forums it may be cheaper to run via...
  6. C

    Unvented Cylinder Tee Off

    Just a quickie, should i tee off for an exp vessel before a balanced tee off or after? Or does it not really matter?
  7. S

    Unvented Cylinder Kingspan Albion Ultrasteel

    Hi can anyone help? I called an Engineer as there was water discharging through the tundish of my heating system, he diagnosed ‘cold water compilation valve failed’ then said I had to call a plumber as it was nothing to do with the system and was a plumbing issue. Surely this is all to do with...
  8. Rakesh

    Gledhill light unvented cylinder imploded

    Hi everyone, Hope someone can shed light on this problem. I’ve been and changed bath taps For a client by first isolating the cold mains. I then opened the kitchen mixer tap to drain both hot and cold water and while that was draining, I went into the bathroom and opened the separate hot and...
  9. A

    Megaflo unvented cylinder drip

    Hi there. I have noticed a drip on the primary flow pipe going into the tank. Not sure what could be causing it. It seems to happen when the heating and hot water are off. Have attached a photo. It comes from the top and runs down the pipe. No dripping in the tundish and we replenished the air...
  10. R

    Advice please on an unvented cylinder

    Firstly hello, i did a quick search and wasn't sure whether this should be in here or the central heating section so if i've got it wrong i apologies! We are looking to replace our current vented system with an unvented indirect 210l cylinder to replace the current pump used for two deluge...
  11. B

    Unvented cylinder relief valve letting by

    Posting here as the unvented G3 forum does not let me post. I am hoping someone could apply some logic and help me with a problem that two plumbers have not been able to diagnose properly. Details : Unvented system. Incoming mains with prv set at 2 bar. Plumber has checked this at ktchen...
  12. D

    Unvented cylinder with no system boiler?

    our client does not want a gas fired system boiler but he wants to keep his hot water storage. Its currently open vented via an old back boiler. The back boiler has been removed and electric rads installed So can we install an unvented system without a gas boiler? The cylinder to have x2 3 kw...
  13. D

    Unvented Cylinder Expansion Vessel - advice sought

    Hi, I am a homeowner, I had a new unvented cylinder (OSO DC 300) fitted in August, and had a small problem yesterday with the pressure valve dumping water and making a lot of noise. Eventually this was resolved. However, during my conversations with plumbers it appears that I have a red...
    • David C
    • Thread
    • cylinder expansion expansion vessel unvented unvented cylinder vessel
    • Replies: 21
    • Forum: Central Heating Forum
  14. T

    Unvented cylinder size for 6 ensuites

    Guys, I and another 3 engineers are perplexed. We have a 4bed 4floor house being turned into a 6bed HMO. We've calculated 45k btu for htg, and know that we are goin to have a system boiler and 300l unvented cylinder.. But 300l surely won't be enough water should, theoretically, all 6 showers...
  15. T

    USA Unvented cylinder - water pressure

    Hi, looking for advice about unvented cylinder. I had one installed as part of a horrific modular loft conversion that was recently finished. The water pressure in the bathrooms is poor, probably worse than when just had combi and I cant use two showers/bathrooms at one time which was the point...
    • Tim0212
    • Thread
    • cylinder pressure unvented unvented cylinder water
    • Replies: 150
    • Forum: Bathroom Advice
  16. DGT plumbing

    Best unvented cylinder

    Opinions please unvented fitters, what do you think is the best unvented cylinder on the market. I am G3 registered before you ask.
  17. Stants

    Pipe size for unvented cylinder and boiler

    hi I have an issue with running pipes ( the route )for a boiler and and unvented cylinder 1 can you combine bother together ( t one into the other) 2 if so what s the minimum pipe size for both ? As I have to either go over , under or dare I say through a steel .... it's in a loft Con Thanks
  18. K

    HELP: Pressurised/Unvented cylinder - No hot water, central heating works fine

    Problem: No hot water from unvented cylinder, although central heating works fine. Hi All - apologies for the lengthy post but I'm keen to get across as much detail as possible. I'm a novice, any advise would be really appreciated. Setup: Pressurised/unvented cylinder (Tempest) System Boiler...
    • KingK
    • Thread
    • central central heating cylinder heating hot water unvented unvented cylinder water
    • Replies: 30
    • Forum: Central Heating Forum
  19. Inverness

    advise on flow and return points unvented cylinder compared to the height of the header tank

    Hi guys, before I go ahead and install a indirect cylinder. The problem is in the loft where the flow and return points on the cylinder are similar height less than 0.1 bar to the header tank. I'm worried about there might not be enough head from the top of header tank to the flow going into...
  20. X

    How to drain only hot and cold feed to a bathroom which is on a drop from an Unvented cylinder.

    The system has an unvented hot water cylinder which heats the water upstairs (via an immersion heater) and I need to drain down the pipes so I can move the two pipes feeding the sink in the bathroom. There are two showers (on a separate drop) one bathroom (on it's own drop) and one sink...
    • xpritt
    • Thread
    • bathroom cold cylinder drain unvented unvented cylinder
    • Replies: 3
    • Forum: UK Plumbers Forums

We recommend City Plumbing Supplies, BES, and Plumbing Superstore for all plumbing supplies.

Featured Content

Back
Top