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  1. K

    Avoiding airlocks in central heating system teeing off from the main pipework

    central heating radiators to feed upstairs and downstairs main paperwork runs in ceiling void downstairs ,need to tee off to radiators downstairs do I tee off from above or below on the main pipework to avoid airlocks
    • Kevo
    • Thread
    • central central heating heating heating system main pipework system
    • Replies: 1
    • Forum: Central Heating Forum
  2. N

    Central heating pump and boiler

    The house has a gravity heating system. I replaced an old failing pump Grundfos UPS 15-50 (130) with Grundfos UPS3 15-50/65 130 I have drained the system and bleed the radiators for air. The problem is that since replacement of pump boiler Glow warm (about 15 years old) comes on for about 5...
    • nut&bolts
    • Thread
    • boiler central central heating heating pump
    • Replies: 68
    • Forum: Boilers
  3. K

    Central heating not working 3 port valve?

    Hi all, Not posted for some time but come up against a small problem. Been off the tools for many years now but I think I know the issue but looking for some reassurance Boiler isn't firing when programmer and room stat is calling for heating, but does for HW. It's a Y plan system, new house...
  4. milleniumaire

    Design For New Central Heating System

    I'm looking to expand my central heating system by adding a new bathroom UFH zone. I'm also changing the pipes feeding the loft radiators to 22mm, instead of 15mm. Early discussions with my heating engineer talked about introducing a Low Loss Header and one or more additional pumps. The...
  5. CorgiDirect

    Have you seen this excellent price on the Fernox F1 Central Heating Protect 500ml ?

    Have you seen this excellent price on the Fernox F1 Central Heating Protect 500ml ? Only £13.17 ex vat. Check out the full range of Fernox product here - https://corgi-direct.com/fernox-best-prices-online-18160-0000
  6. Jeffrey Griffin

    Central heating wiring

    Hi there just to ask on wiring for a salus 2 channel programmer. We only have the boiler coming off this at present. We don't want to seperate the rads and water as yet as this wiring is upstairs! So we are using two channel programmer to basically operate the boiler. We have LNE coming off a...
  7. J

    Should I replace central heating pipework.

    Hi This is my second question and follows on from discoveries made while investigating dropping flow rates where you guys contributed a lot. I have made an access point to the crawl space and had a look around. Let me say at this time we are a living in a cottage so all is on one level. A...
  8. Jock Spanners

    To seal a central heating system or not?

    Good morning everyone, I have a big old vicarage which needs a new regular boiler. They also want fancy mixer taps in the kitchen . They have two hot water cylinders linked together, a shower pump and curved old radiators in the bay windows. I'm agonizing over what to do. The easiest option is...
  9. M

    Central Heating cut and shut

    Hi All, Just a quick question, would it be possible for me to shut the gate valve to the flow pipe to the central heating and open the return at any radiator without it causing a mess? From what i know, the flow goes in to the radiator and after coes out as the return, so technically if the...
  10. J

    Central heating in a garden outhouse...

    Hi there, I am building a single storey outhouse at the bottom of my garden and I want to install two radiators in there. I’m just trying to ascertain whether it will be feasible to just connect them to my existing central heating circuit in the main house? My current boiler is a Vaillant...
  11. L

    Noisy Pipes on central heating system

    I'm having some rumbling and water trickling noises in radiators on my central heating system. When the hot water clicks on there is no problem and if the central heating clicks in at the same time again there is no noise - but if the central heating doesn't come on and the thermostat is turned...
  12. R

    moving central heating radiator.

    hi.i'm repositioning radiator in bathroom but there's no isolating valve on pipework..after i've turned electric off to the boiler and drained down the system will i still be able to have a shower,fill the kettle while the radiator is re-plumbed in the new position.thanks
  13. D

    Central Heating - Pipe Sizing?

    A couple of years ago I had a new central heating system installed as part of a full modernisation. Unfortunately I’ve been having problems with other aspects of the renovation so for a while I’ve been running it without a control system or TRV’s (I have a Honeywell EvoHome set ready to go but...
    • Deleted member 116030
    • Thread
    • central central heating heating pipe
    • Replies: 3
    • Forum: Central Heating Forum
  14. S

    how to stop tapping / clicking noises from central heating pipes even though there not on?

    Changed from a gravity feed boiler system to a combi boiler and had problems with noisy pipes? About 4 weeks ago now had a new combi boiler installed, and from day 1 had noises from the heating pipes even though not on. Thought I was just up grading to a more modern space saving cost efficient...
  15. V

    central heating permanently on, faulty motor?

    My central heating won't turn off via the wireless thermostat. I can see that it communicates correctly so suspected a problem with the zone valve. It is a Honeywell 2 port and I notice the manual level is completely loose and I can't lock it in the manual 'on' mode. We have other zones and...
  16. C

    Drip from central heating additive vessel. Does it unscrew? I can’t budge it.

    I’ve tried unscrewing this thinking I can use ptfe tape and re-screw it, but it’s not budging. I don’t want to force it if I’m wrong and it doesn’t have a thread. Does anyone know please?
  17. K

    Noisy grundfos pump central heating

    Hi My pump has started making a loud rattling noise. I’ve undone the screw at the front and no air escaped! Any ideas would be most welcome thanks
  18. P

    Peculiar central heating problem - any ideas?

    Our central heating system "bangs" sometimes when the Hot Water comes on. A single bang. The engineer came and replaced the mid valve actuator. This had no effect. The engineer came back and replaced the mid valve. This seems to have had no effect. We have a recording taken on my iphone when...
  19. R

    Speedfit to copper on central heating systems.

    As per the title. What do you think of using Speedfit in part of the cental heating system? In particular a 15mm x 300mm flexi pipe. Bent at 90 degrees. See link. Not sure what I am dealing with yet but I suspect a leaky Yorkshire elbow below the floorboards. Rather than remove it, clean it...
  20. S

    Help please! Need to identify Central Heating Filter

    Hello, I am a new home owner and I need some help please. I have a filter attached to my boiler (Baxi Combi). The filter does not have a label. I need to identify what the filter is. Apparently these filters come with a sort of circular key to tighten the top. I did not get a key with the House...
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