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pressure

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  1. I

    Frost Protection and low pressure

    If my boiler is set to frost protection but the boiler is low on pressure would the pump still kick in at low temp? I only ask this because it is in my caravan. I've drained it down and don't really want to power it back up just to fill the water pressure to then drain it back down again.
  2. J

    High meter operating pressure and low gas rate

    Hi just been to check a family members boiler and I’m getting just over 25mbar working pressure at the meter and 22mbar inlet pressure at the boiler. Standing pressure is 29mbar and done a tightness test and that is all fine. Also did a gas rate and it’s only only showing as 22kw and the boiler...
  3. E

    Boiler pressure is too low, filling loop

    Hi all Moved to flat recently, and the heating is not very good. I realized the pressure is too low, below 1 bar. It is Meibes, product number 10920.26 OH5 So I am looking how to fix it. I am only a DIY'er, so bare with me. In the diagram you can see the fill loop mentioned, but that is not...
    • Erdinc
    • Thread
    • boiler filling pressure
    • Replies: 2
    • Forum: Boilers
  4. W

    Boiler pressure too high can't lower it.

    Hi folks my partner has a Greenstar 30Si boiler, the pressure is just below 3 bar but for the past year or so water has been slowly dripping out of the overflow pipe. I've bled the radiator upstairs and downstairs drained about 2l out but the pressure doesn't drop at all. Any ideas? Thanks.
  5. R

    Boiler pressure too high - and too low!

    Hi looking for some advice please. We have a Viessmann VT100-W (WB1C 30kW) boiler. It's about 8 years old. I am now topping up the pressure about twice a week. I check the pressure first thing in the morning when the system (and me) is cold. Pressure is around 0.7. I top it up using the...
    • Rod4444
    • Thread
    • boiler high pressure
    • Replies: 4
    • Forum: Boilers
  6. ArifP569

    Pressure loss when UFH called for

    Hello all, hoping someone could help me with this, Boiler pressure is 1.5 bar, but when we turn on UFH pressure drops to 1 bar. then when we turn off UFH, pressure on boiler goes back up to 1.5 bar?? any help much appreciated
  7. M

    Open vented system - Boiler turns on and then loses heating pressure?

    Hi guys, We have an open vented heating system and a Worcester Bosch greenstar boiler. Recently there is little to no heat getting to all radiatiors. It seems that when we turn on the nest heating the boiler starts whirring as expected as then dies down quite fast. I cleaned the magna filter...
    • MattStorey
    • Thread
    • boiler heating pressure system
    • Replies: 2
    • Forum: Boilers
  8. A

    Boiler losing pressure without any leakage

    Hello! I have a combi boiler (n8 topline compact hrc 30/cw5) required to fill in 1.5 BA, 8 radiators, and heated floors in the same system. I have a pressure loss problem, I lose ~0.3-0.4 every week without visible leakage. I had 2 plumbers and 1 guy from the boiler gas service company. The...
  9. D

    Slight pressure drop.

    Hi. I have a boiler which is approx ten years old. A few months ago we had the expansion vessel replaced by a BG plan but noticed that there was a slight pressure drop since they fitted it. The copper pipe outside had an odd drip here and there. On top of that I had to have a valve on one of the...
  10. L

    Oxypic causing high pressure?

    Hi all! We had low pressure in our Potterton boiler (gas) and the guy who serviced it recommended to try Oxypic. We did that last weekend and re-filled the water making sure it was turned off. However the water has started to increase and now it’s in the red (too high pressure). Any idea what’s...
  11. J

    Combi- hot water pressure

    Hi We have recently had a 35kw combi boiler installed in a 4 bed 2 bathroom property. Since the combi boiler was installed we are getting slow hot water pressure affected shower and bath I wouldn’t say it is trickling but it is not a good pressure where you feel clean. The bath takes longer...
  12. N

    Advice for low pressure to electric shower

    Hi, i'm looking for some advice on improving the performance of my electric shower as it frequently fluctuates in temperature and flow. The 8.5kw shower was installed in April so is fairly new, the property however is a terraced house with 1.6 bar water pressure at the stopcock, any kind of...
  13. P

    Combi sys losing pressure every 2 days 4 months but no sign of leak

    Combi boiler system losing pressure every 2 days. We've been topping it up for months now and have had various radiators replaced and flooring pulled up downstairs around each of the radiators but so far no leaks have been found. I'm at a bit of a loss of where the leak can be because given...
  14. P

    How to raise pressure in my samsung 6 gen joule heating system

    Hi Guys, my pressure gauge showing nearly (if not) 0 Bar. Heating downstairs works for now, upstairs 2 out of 5 rads not. I'm trying to get a plumber in but it will take few days, have kids home and afraid to end up with no heat. I believe all what it needs is get pressure back to 1 bar but...
  15. S

    Baxi Combi 105e: CH lost 1 bar of pressure in a few hours

    Hi everyone Summary is in the title. Found the boiler was at 0.5 bar earlier today so topped up to 1.5 bar. Checked before bed and its back to 0.5 bar. There are no signs of a leak around any radiators nor any suspicious water damage on the downstairs ceiling. Before I rip up all the flooring...
  16. David0671

    Megaflow low pressure

    Hello I have a megaflow system that is 7 years old I'm getting low water pressure to 1of the upstairs toilet taps every other tap is fine, this occurred after I represurised the air gap something I have done on numerous occasions. Any advice would be appreciated as I have has a plumber/...
  17. M

    Boiler Inlet Pressure

    Hello all! First post on here. I'm newly qualified - could anyone tell me if there is an absolute minimum acceptable gas inlet pressure at the boiler? I understand refer to MIs, make sure it's safe and not affecting any other appliances, but if it's below manufacturers recommendation, correct at...
  18. M

    Non uniform pressure loss in Greenstar 30i

    Dear All, I hope you might be able to point me in the right direction with an issue I have with a 3 year old Greenstar 30i boiler, last serviced in Oct ‘22, with new pipe work all around the house at time of boiler install. We have separate circuits upstairs and down and a water cylinder. At...
  19. S

    Boiler pressure keeps dropping

    Hi Guys I have a combi boiler. I havent used it for over a year. However when I came back to the property I had to pour boiling water over the condensor pipe outside as it was frozen as I was unable to get the rads on. Which worked. So it heats up etc, no issues whatso ever. ( I am not using...
    • shocksl
    • Thread
    • boiler pressure
    • Replies: 4
    • Forum: Boilers
  20. S

    Tank leaking & heating losing pressure - solar water heater

    Hi, We have solar panels for our hot water, so we have the main water tank in the airing cupboard, plus a small pressurised (I think) tank. The smaller one has been leaking for several years leaving rusty water on the outside & on towels in the cupboard. The system also keeps losing pressure...
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