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unvented

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  1. P

    Unvented cylinder wiring

    Hello all I'm replacing 2 unvented cylinder a which are (a) end of life and (b) installed in a way which is clearly not right (no 2 port shut off valve on the heating coils just for a start, and there are other issues). The heating coils are currently controlled with 3 port valves that are...
  2. M

    Re newing G3 unvented

    Has anyone recently renewed there unvented? Is the theory a long exam?
  3. B

    installation of Boiler - Unvented tank

    As part of a rebuild (added 1st floor to bungalow and extended back) we have removed every piece of plumbing and electrics, during COVID In preparation for the complicated stuff, during the build we have ... Gledhill unvented tank (preplumbed) placed in 1st floor airing cupboard New...
    • bt0558
    • Thread
    • boiler installation tank unvented
    • Replies: 10
    • Forum: Boilers
  4. M

    Buffer Tank/Thermal Store addition to S Plan Plus & Unvented Cylinder?

    Hi sorry bit of an odd query here. With the increases in energy costs now and in the future we are trying to find any way to reduce our exposure (retired couple on fixed incomes). We are fortunate enough to have bought solar panels at the beginning of the year but as we head towards winter the...
  5. S

    Unvented Cylinder set up via gas system boiler and time clock

    Hi I wanted some steer from he forum for my set up. 2 storey house now extended on ground and a loft conversion. New plumbing install as of 18months. Worcester bosch 8000 life sysem boiler via natural gas. Time clock with HW / CH split, 7 day digital. 250litre Gledhill Select Indirect...
    • Space_Goat
    • Thread
    • boiler cylinder gas engineer system unvented unvented cylinder
    • Replies: 15
    • Forum: Boilers
  6. Riley

    Unvented balanced cold

    Good morning chaps I have been given the task of fixing a previous installers cock up and trying to fit an unvented cylinder with everything else already completed on the house, fun I know!!! I know it is not best practice but I can’t think of another solution, apart from the obvious minimal...
  7. M

    Renewing unvented quals

    Anyone know what is involved in renewing unvented qualifications. Is it a few written questions and a practical fault finding on unvented? I got my original through my level 3.
  8. N

    Unvented system leak issue

    I had my old boiler replaced and changed to an unvented system and relocated into the loft. Everything worked well for the first month or so. I then had a different plumber and builder to create new bathrooms and also put on new radiators throughout. The original plumber came back to...
    • Novice needs help
    • Thread
    • leak system unvented
    • Replies: 16
    • Forum: UK Plumbers Forums
  9. M

    Combi vs unvented???

    Hi guys. I know there’s a lot of people who are happy to just chuck in a combi on every install, whether it’s suitable or not. What I’d like to know is, in what situation do you refuse a combi? Obviously things like a 4 bathroom house might not be suitable but what about cost savings with...
  10. H

    Unvented cylinder for ASHP

    Hi all. I have an Isoflo CL170 cylinder with good few years life left in it in my system which has performed trouble-free other than the odd new immersion element. I'm getting a new ASHP fitted and the installer is recommending scrapping the Isoflo and replacing it with a Secon Trade Heatpump...
  11. B

    Boulter Camray 2 to run unvented/ pressurised

    Hello, Re-jigging a serviceable Boulter Camray 2 boiler to run presurised instead of gravity. Manual says it can but we need to fit Manual reset Limit stat and Phail tube to put into boiler for sensor -both available. (Also Expansion vessel obviously!) This seems straightfrward - any comments...
  12. R

    Pressure loss in new loft (unvented cylinder)

    Hello. I need some urgent advice re water pressure in an unvented system. A few months back, I had my gravity fed system + boiler changed to an unvented cylinder + system boiler. The water pressure following the swap was incredible. We were originally talking about putting in a mains booster...
  13. R

    Megaflo Eco System Unvented Cylinder Loud Bangs

    Hi Everyone, Hoping for some advise / assistance on an issue I have on my Megaflo Eco System Unvented Cylinder which is making a loud band. This occurs when the hot water heating is on and when the cylinder heats up to temperature, once at temperature the motorized valve closes and there a...
  14. G

    Pressure rising on an unvented system

    Hi all, The pressure bar in my unvented system is rising. It’s set at 1.5 and rises to 2/2.5. I know it will rise when the water is heating but this now doesn’t drop. I have an Oil boiler and at present only the hot water is on. I have reduced the pressure by bleeding a radiator. My question...
    • Glen Eley
    • Thread
    • pressure system unvented
    • Replies: 2
    • Forum: UK Plumbers Forums
  15. R

    Unvented cylinder viability??

    I'm looking at getting an unvented cylinder fitted but want to know if it's viable before even getting a quote. My cold incoming main is only 15mm but I do get a good pressure and flow which doesn't change alot when another tap or shower is used. Would an unvented be possible?
  16. C

    Unvented Center cylinder no hot water

    Hi all, I’ve got an issue with no hot water from Center 300L unvented Cylinder on S Plan plus system. All Electrical controls working fine. Only way to get hot water to the taps is by using immersion heater. Any ideas what could be up? Thanks in advance.
  17. B

    Nightmare boiler and unvented cylinder installation

    Hello and happy Easter everyone, hope you're having more fun than me! Friendly advice needed please. Long story short, we arranged to have a 2 day 2 engineer installation of system boiler and unvented cylinder, replacing a heat only boiler and unvented cylinder with broken coil. Got 3 quotes...
    • BollyR
    • Thread
    • boiler cylinder installation unvented unvented cylinder
    • Replies: 41
    • Forum: Boilers
  18. J

    Suitability of Unvented Cylinder

    Hi I've read through dozens of threads on here about unvented systems but was wondering if someone might provide some advice on an upgrade we are planning as part of a bathroom refurb Current Setup: Gravity fed system with cold water tank in the loft and hot water tank in the hot press (1st...
  19. pufferfish91

    Unvented Cylinder Gushing Water from Relief Valve?

    Hi folks, I hope someone can help me. This morning we noticed water leaking under the hot water cylinder in hotpress room. On closer inspection, the water was just gushing on to the floor and it was only by chance we noticed it. We turned off the heating system and spent the morning emptying...
  20. O

    Unvented cylinder - usage question

    We have an unvented cylinder with a Horstmann Electronic 7 timer. The cylinder only serves a wet room which is very rarely used. The rest of the house is served by a Vaillant combi boiler. The timer on the cylinder is set to heat up water 3 times per 24 hours, which I think it is the default...
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