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unvented

  1. Stants

    Unvented Cylinder size ? ( Evocyl )

    Hi all I'm having New heating set up installed in a loft conversion the Cylinder ( unvented ) and Boiler are being sited in a cupboard within the loft space ( adjacent to the new stairs ) im a bit tight on space Height and width as I am trying not encroach on the bedroom as much as is possible...
  2. K

    Tundish dripping on a Joule Unvented Cyclinder

    I have recently noticed that the tundish is dripping ever so lightly. I had a new boiler fitted in Nov and at the time the tundish was flowing a lot but the plumber fitted a water pressure valve which seemed to stop the dripping, but it has started again. Pressure on valve is same as was...
  3. G

    gas safe: notification on unvented

    hi i'm gas safe registered i have my g3. i stopped fitting a few years ago when gas safe stopped notifications. i only ever did one maybe two a year so it was not joining yet another scheme in order to be able to notify. Due to covid, with work situations changing thinking i might need to...
  4. A

    Unvented Question (flow/pressure related)

    Hoping someone can sanity check me! Bit of a project house - had an unvented cylinder fitted in the loft around a year ago. Gledhill horizontal, Worcester system boiler as well as wet underfloor throughout. As part of this we had a new 32mm MDPE mains fitted. This enters the house and reduces...
  5. gingalig

    Dunsley removal and unvented conversion to sealed.

    Need to pick a couple of brains whilst exposing my chasm of limited understanding. Before I qualified, about 10 years ago we had a Dunsley neutraliser fitted, combining a Firebird oil boiler and a Hunter multifuel. Over time we've never really been happy with the set up and have a shower pump...
  6. D

    Low loss header connection Inc pump to unvented system

    I am fitting my first low loss header onto an unvented system including ufh and 300ltr tank. I have picked the job up after the ufh has been layer, tested and screened over. All I have to work with is the manifold with flow and return pipes and pre installed rad circuit all of which feed into...
  7. Q

    Unvented cylinder install - safety concerns. Appreciate advise.

    Evening all, At risk of blabbing on i'll try keep this short. I recently replaced an old vented hot water system with a unvented system We went for the Telford Tempest 300L installed by G3 qualified person. Functionally it works well. Pressure is great, heats well, no leaks. There's still...
  8. H

    Unvented cylinder in celler

    If I install an unvented cylinder in a cellar and a system boiler on the ground floor above will the system still work?
  9. C

    Unvented immersion stat playing up

    I’ve got a stelflow 250L with 2 immersions fed by a change over stat so when top is hot bottom starts heating. anyway the bottom stat recently tripped so I reset it. All was well but today it’s playing up again. I can hear it click if I mess with the casing. it’s a cotherm TSE. I’m going to...
  10. E

    Should I do NVQ 3 or stick with nvq 2 and do acs, unvented

    Hello all, I wanted a bit of advice. i have done the level 2 diploma in plumbing and also the nvq 2. I will be completing the level 3 diploma this year. My question is this. Do I do the nvq 3 which takes 2 years and includes gas and unvented or do I stick with nvq 2 which makes me fully...
  11. S

    Unvented Cylinder loses pressure when I bleed radiator

    my unvented cylinder system has been losing pressure. So I started the investigation as to whether it is losing pressure due to hot water or heating. So waiting for spring / summer when I don’t run heating much. I can see that only one of the radiators which I need to bleed as it is always cold...
  12. Q

    Valliant Unvented 300l- Water constantly running through pipes

    I have an unvented pressurized plumbing system (Valliant 300 l). It seems as though the water is constantly running excessively through the pipes from the water tank. It's not coming from the tundish side, i think its coming from the pressurised tank. What can be the cause? How can i verify...
  13. Lumen

    Unvented Cylinder. Does this guy know what’s he’s doing?

    Hey guys, Quick question for all you central heating experts out there. I’ve had a guy lowering two expansion vessels and installing additional zone valve for a new extension. As the result he’s re-done most of the plumbing in the airing cupboard. Nice guy, but he was rushing to get the job...
  14. J

    Another leaking unvented system!

    My unvented system is losing pressure. I have been checking to see exactly when this happens and it seems to be losing quickest when washing machine or dishwasher are in use. Pressure drops from just above 1 bar to almost zero over a period of a few hours. I have to bleed the towel rail (highest...
  15. C

    Leaking/Whining Unvented Cylinder

    Howdy, We had our loft tank removed and our cylinder replaced with a Worcester Greenstore unvented cylinder and have a few issues with it. Firstly, it is leaking pressure. We were advised it should stay around 1.2 bar when cold but have had to refill it semi-regularly. We cant find a leak on...
  16. N

    Help!! Unvented water heater

    I moved into a property last month and the unvented water immersion heater has been the bane of my life. I noticed hot water was coming through the tundish so called a plumber out. He replaced the heating element and also pumped up the booster cylinder as it had no charge in it. 2 weeks later...
  17. B

    Leaking joint on hot water outlet pipe of unvented water heater

    Hello All, I've got a small leak where the pipe of the hot water outlet of an unvented water heater joins the valve. I'm attaching a couple of photos to give an idea of the set up. Is there a good solution that doesn't involve resoldering the joint? Many thanks.
  18. davidw

    Is this cylinder vented or unvented?

    Hi, I have this cylinder in the airing cupboard. Is it a vented or invented system? There is no water tank in loft. thanks for any help.
  19. T

    Baxi Burnall with back boiler connection to Unvented /Mains pressure water tank ??

    I have a Baxi Burnall open fire with wrap round back boiler connected via a Dunsley Baker Neutaliser to the vented hot water tank. I wish to update my older vented system to an unvented twin coil indirect water tank with two immersion slots. I want to use one immersion slot for my recently...
    • timeley
    • Thread
    • back boiler baxi boiler connection mains pressure tank unvented water water tank
    • Replies: 0
    • Forum: Boiler Advice Forum
  20. townfanjon

    Hive on a direct unvented

    Guys as above , customer has a apartment and spends a lot of time abroad ( obviously not at the moment lol ) Heating is run by a electric flowboiler and a direct unvented . He wants to run it through Hive or similar . I think the heating side will be ok but cant see how the HW will work without...

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