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Central Heating Boiler | Boiler - Hot water boiling system​


A boiler is a closed vessel in which fluid (generally water) is heated. The fluid does not necessarily boil. The heated or vaporized fluid exits the boiler for use in various processes or heating applications, including water heating, central heating, boiler-based power generation, cooking, and sanitation.
Central Heating Boiler | Boiler - Hot water boiling system

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  1. cyberfruits

    URGENT Solid fuel back boiler decommission

    Hi We have a vented oil-fired heating system with a coal fire back boiler, this is going to be changed to a sealed pressurized system tomorrow and I believe, they are decommissioning the back boiler. I have only discovered today there is no access to the water jacket, so will it be good enough...
  2. TeddySam154

    Boiler has started leaking water urgent advice needed?

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  3. B

    PLEASE HELP Hot Water Combi Boiler Advice

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  4. C

    combi boiler frost protection

    Hi I am somewhat confused. My daughter has a combi boiler bought 2-3 years ago and has it timed to come on in morning for an hour and at night for a few hours using "auto"? mode I had been brought up to leave boilers on manual and set the thermostat low at night to prevent pipes from...
  5. Daviddickson

    Boiler Replacement in Glasgow - Discussing Options and Recommendations

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  6. M

    Hot water demand effect on central heating for Combi boiler

    Hello, We’ve recently moved into a fairly old, fairly big detached house (i.e. fairly draughty, but not too bad by any means) with a fairly new well maintained Worcester combi boiler. We weren’t convinced the heating was working right and then got hit with a £610 energy bill for the first 6...
  7. Clottie

    BS759 is water quality testing legally mandatory for landlords

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  8. M

    Are repairs on a recently serviced boiler free?

    My boiler was serviced a month ago and now it's leaking. Is it normal for the plumber to repair the leak for free seeing as it was so recently serviced?
  9. A

    Worcester Greenstar Ri Boiler Knocking

    Hi there, My boiler (Worcester Greenstar Ri) has started making a soft knocking noise when it turns on, and again a few times when it turns off. I've attached a short video of the sound. It isn't constant, it seems to happen within the first 10 mins of the boiler starting up, then you won't...
  10. T

    Vaillant eco plus 837 System loosing pressure.

    I have a Vaillant eco plus 837, year installed 2008. It works well. We have one large zone for the house with 13 rads running off it. We also have an UFH zone in the kitchen. Near the boiler I have 2 port valves which control this part of the system. The boiler has been loosing pressure...
  11. M

    Baxi boiler pressure drops after heating

    Hi, we have a back combi heater. Whenever the heating comes on it seems to lose pressure within a few hours and I have to refill each morning. The boiler seems to function well, and the pressure only drops with the heating and not the water being on. Ie it started last winter and was then...
  12. W

    New boiler but extension still not hot

    Hello, We had an extension built seven years ago. Initially the builders' plumber connected the heating to the house system but this didn't work. The builder got him out again and he created a separate heating circuit from the boiler (ie one circuit for the house, the other for the extension)...
  13. V

    Gas Boiler service Cost

    Hi All, what's the cost of a service for an unvented system ? (valiant boiler & mega flow cylinder). I was charged £320.00, for the following: Boiler service - no parts changed. Change wireless thermostat (honeywell to Tado), I supplied the thermostat starter kit. is that about correct ? Also...
  14. C

    AAV closed in Vaillant boiler for many weeks - how risky?

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  15. T

    rads cold no indication of boiler fault HW fine (pls urgent)

    Hi All Bit of an urgent one being that time of year and can't get a plumber out until after xmas even on an emergency callout I have just tried to turn on my CH for the first time this year as I have a number of guests coming for xmas dinner but even after an hour all the rads are stone...
  16. paulm05

    Grant combi oil boiler problems.

    My Grant combi oil boiler is giving me quite a headache at the moment. When I returned home last Friday I'd no heating or hot water. An engineer called the next day and diagnosed a faulty pressure switch. This was changed and everything seemed ok. However then the boiler began to lose pressure...
  17. G

    annual boiler service

    I recently had a service on my worcester bosch boiler by Warmserve supposedly reputable which is under guarantee and before the service I had no problems but straight after the service I had a leak from the boiler which when the service engineer came back told me I needed a new condensate trap...
  18. chloeradhsaw

    Two pumps on a heat only boiler quotation

    I just had a quote for a new boiler install as follows I dont undertand why a 15-60 boiler pump is needed and a 25-100 pump is needed as well I currently have an ideal mexico 2 heat only boiler - It has one DAB pump on the boiler return and a 2 port valve at the flow pipe to allow for heating...
  19. I

    Tado thermostat not triggering boiler

    I've had my tado system in my new build for 5 years now and it's been fine. Yesterday morning I changed the batteries on the second floor thermostat and now it's not switching on the boiler to heat that floor. The thermostat display is fine and the app is fine. All systems say they are fine and...
  20. B

    Boiler condensate pipe leaking at joint

    Hello I have a condensate pipe that appears to be leaking at the joint. How do I fix the leak? Would something like plumbers putty around the joint work or does it need to be some other compound? Can I simply pull the pipe and joint out and then put the compound round it Thanks
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