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system

A system is a group of interacting or interrelated elements that act according to a set of rules to form a unified whole. A system, surrounded and influenced by its environment, is described by its boundaries, structure and purpose and expressed in its functioning. Systems are the subjects of study of systems theory and other systems sciences.

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  1. W

    Red sludge in Openvented CH system

    I have flushed a CH system removed each Rad and removed any residue of black sludge filled the system up and treated with inhibitor. However after 2 days the water in the Overhead tank is gone red. The Ground floor rads are piping hot and the upstairs are Luke warm bleed the rads still no joy...
  2. J

    Towel heaters not getting hot in small pipe system

    I have just moved into a late 1990s new-build house with a small bore (about 1/2" OD pipes) gas fired boiler central heating system. All the normal radiators get hot but two of the three towel heater/radiators don't get hot and the pipes feeding them are cool to the touch even after the boiler...
  3. B

    What is the problem with my oil central heating system?

    Context for issue: Last winter the temperature switch on my boiler shorted somehow, the boiler was then running WAY too hot and ended up blowing/melting a hole in one of the pipes. I repaired this by putting in a new stretch of pipe in and just connecting it to the existing pipes with two...
  4. B

    What is the problem with my central heating system?

    Context for issue: I'd like to start by saying I'd rather not read 100 "Hire a professional comments", I will do that when/if it comes to it, but I'd like to do it myself if possible. All images for system here: https://*********/a/ngPQkre Last winter the temperature switch on my boiler...
    • Butchy10
    • Thread
    • central central heating central heating system heating heating system oil boiler problem system
    • Replies: 0
    • Forum: UK Plumbing Forum | Plumbing Advice
  5. S

    hot water not staying hot in an unvented system

    hello we have an unvented system. we have an issue where the hot water is hot for 10 seconds and then luke warm, turn off taps / wait and turn back and it repeats itself. had boiler checked and told it was the expansion vessel. Had the expansion vessel drained and recharged. plumber told me...
  6. I

    Viessmann 100-W System With Evohome

    Morning, I have a job later this week with the above , Viessmann Vitodens System boiler. It has a 4 pipe setup with internal diverter and at present there is a wireless thermostat/programmer controller in the hallway. Customer wants a Honeywell Evohome System and I just wondered if I can wire...
  7. G

    22mm Gas Feed for 35kw boiler - How do I know this is big enough?

    Hi folks, i've just moved into a property last month and begun to take note of things that may need attention. One of which is the feed to a 35kw system boiler appears to be in 22mm flexible steel pipe (tractpipe, or teslaflex or w/e). Distance from the meter is only 4m-5m or so, and I assume...
  8. J

    Heating won’t come on after draining system

    Hi, I drained the the central heating, to remove a radiator. After refilling it, the heating now won’t work. It’s a combi . I’m getting this symbol
  9. W

    Old radiant heater system bleed valves

    Hi, I'm in New Mexico US... I have a fifties boiler with floorboard radiant hydronic heating. The old valves are corroded and not working. I have found a bushing valve combo that has same threading but different profile. Please anyone knows of source for old valve types... Or, can the new...
  10. B

    Kitchen and bathroom system legit or not?

    Where and how does the water supply work and is there only one rising main pipe and where is it usually located? I am top floor flat, mains fed supply and all 6 in the block have a shared rising main pipe (I think unless there is meant to be more than one). Kitchen: From the ground floor to...
  11. S

    DIY Replumb Heating system

    Hi, I'm after some advice for a current system which I'm looking to replumb. Our house has had various extensions of heating system with newbuild extension and other additional rads over the years and now the system is inefficient and doesn't heat up consistently. In the extension, because the...
  12. E

    How to calculate heating system capacity for expansion tank

    Hello want to know on how do you calculate size of expansion tank for closed heating systems . for example 500 meters of 16mm underfloor heating and 4 double ~1000mm radiators , hot water cylinder coil , and oil boiler
  13. J

    System or Heat Only Boiler

    A (if) CH system has a very high head loss due to improperly sized pipework and long runs and possibly partially blocked pipes and requires a UPS2 pump running at its 8M head to feed 21 rads with a theoretical output of 25kw at a 20C dT. A fairly old Vaillant 438 boiler is being replaced, the...
  14. C

    Megaflo system fit not working

    Hi can anybody help me with a problem I am having. following a power cut the heating and hot water failed. The boiler would light but it would go out because of no flow. I thought it was the programmer blown because if it wasn’t calling for heat or hot water it doesn’t trip the electric,but as...
  15. T

    Advice on new system

    Hi all, sorry about the long post but a novice here looking for some advice... I've just bought a 12 bedroom private house with 3 bathrooms that we're turning into a guesthouse. The property was built in the 1970's or so and has an oil fired boiler with a standard copper cylinder. As far as I...
  16. A

    Removing old radiator pipes, do I need to drain the system?

    Hi All, I have two sets of radiator pipes that need removing. Although neither set of pipes have radiators on them anymore they are both still connected to the system and contain water. A plumber I have spoken to says to remove them he'll cut the pipes vacuum out/up any water and then cap them...
  17. H

    Problem with unfamiliar CH - embarrass me by how simple it really is!

    I am generally a decent handyman, can usually make 2+2=4 and take care of most things to avoid troubling experts with just the basics, but know also not to bumble around blindly beyond that. We moved house last week and with the glorious hot weather we weren't bothered about the heating, more...
  18. Beyond the blue

    DIY air conditioning system

    DIY air conditioning system. I've got lots of plumbing experience and want to install my own a/c split system 3 to 1. I intend having it commissioned by an F Gas qualified company. When l tried to buy the system the supplier want all details of the F Gas registered 'installer' before releasing...
  19. J

    Cylinder System not running heating and water at the same time

    Hello, Newly moved into a house with a mains fed cylinder system. I've never had one before and struggling to get it working. When I turn either heating or water off at the timing unit, the other works fine. Eg, with heating off, water works and vica versa. The indicator lights are solid blue...
  20. T

    Oil Boiler and System upgrade

    Hi All, We have finally decided after a bit of a persuasion to have installed a utility room in our garage that currently houses our oil boiler. Initially we thought the boiler may stay in place but after discussions with the builder we would have to move the boiler to replace the floor and...
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