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flow

  1. R

    Does air lock affect flow rate in UFH

    Hi all, having issues with my underfloor heating . Flow doesn’t stay hot as return just stays cold even though boiler is operating as it should . My question is does an airlock reduce the flow rates ? I can get good flow 4+ ltr / min through the loops but still the return and hence flow stays...
  2. U

    underfloor heating. one section not heating.

    Problem with activator in just one area of the UFH system. I don't know how to take off the activator to check the pin. No problem with water flow. Not sure how to handle the flex coming out of the activator. I know the pins aren't working as the water gauges are not responding (that's what...
  3. R

    Underfloor heating flow won’t get up to temp

    Hi all. As above having issues with my UFH. Boiler fires up and works as normal . Issue is the return stays cold and as such when the boiler switches off when it reaches temp the flow stays about 35 degrees and the cycle continues . Have had it running with just one short loop open , pump on 3 .
  4. Z

    Idea for those who have cash flow problem

    I had a terrible time finding a plumber and I am trying to think of a way to help him as I have one whom I trust implicitly thought that I could put a Medium sum of money in his account specifically to cover labour on future jobs As it’s only labour that is covered then there is no risk to...
  5. D

    Concern over flow of electric shower

    Hi, I have water immersion heater on a timer. Problem:I need more instant hot water - 5 people in house having daily showers. Currently we have 2 bathrooms which are fine for showers and pressure is decent enough (until hot water runs out!) There IS a pump to increase the pressure which works...
  6. Minidriver

    Boiler dhw flow adjustment

    Hi guys. New here. Basically I bought this house 2 yrs ago. Back when I bought it I took over an existing plan with British gas for my boiler servicing. Upon first service, I asked about hot water as if you turned the bath tap on more than 1/4 turn it ran like warm at best. He said he...
  7. W

    Why does oil not flow from elevated tank

    I have a Rayburn 308K oil burning stove (uses concentric wicks) It is fed from a tank which is around 3m (10ft) above the inlet of the stove. I have it around 20 years. Ever since I got it, if I run out of oil, the stove will not light after the tank is refilled. The only way I can get the oil...
  8. T

    List of DUAL FLOW taps

    Does anyone have a list of dual flow kitchen taps both mono and deck mixer types for mixed pressure supplies - Mains CW, Gravity hot. Trying to find one is a bloody nightmare. Thanks in advance.
  9. milleniumaire

    Does a waste flange affect flow rates?

    As part of a bathroom refurbishment I'm installing a new low profile shower tray and a 90mm waste. I'm looking to use a McAlpine 1.5" hi flow shower trap, which gives 42 l/m flow. There are various flanges available, but the one that would appear to give the best flow is the ST90CB10-HP2...
  10. M

    Thermal store combi boiler, hot water flow rate.

    Can anyone tell me the hot water flow rate on a thermal store combi boiler? As opposed. To a 40kw combi that will deliver nearly 16litres per minute. And any recommendations for a good thermal store boiler thanks.
  11. T

    HIU Flow Rate Dropping

    Hi All I live in a new build block of flats. We all have HIUs. This model. Type 2 HIU Connection for Primary & Secondary Heating Circuits - Switch2 - https://www.switch2.co.uk/product/type-2 The entity that owns the system didnt maintain it very well so they just had to flush the whole...
  12. Plumbase

    Fluidmaster: Airgap Launch & the Issue of Blue Water Back Flow

    Fluidmaster recently released their new range of flush valves – the Airgap 6000 series. Designed and manufactured in the UK Fluidmaster’s new range is an essential for plumbers who install, repair, or conduct maintenance on toilets and is the only adjustable flush valve on the market today that...
  13. V

    New circulating pump. Low flow

    Hi guys. I live in a bungalow with 14 radiators. Closed loop heating system The heating is zoned so that individual areas or hot water can be independently heated. All radiators and heating cylinder are at ground level. My boiler is 7 meters away from the house in the garden. 11 meters...
  14. R

    Will low water flow affect the function of an electric tankless water heater?

    I have a cabin about 300' from my well and about 30' elevated from the well. The water heater doesn't work properly. The flow is low through the tankless electric water heater. Is it necessary to increase the flow? If so, how am I able to do that?
  15. siricosm

    Is a flow switch really necessary?

    I am contemplating installing a heat bank type thermal store, with an external plate exchanger for DHW. The pump on the primary (tank) side of the plate exchanger is usually controlled by a flow switch on the DHW side. I am thinking to use a modulating pump (Grunfos apha2) and a thermal...
  16. M

    Radiator water flow noise - Can anyone help, please?!

    Hi, Since having some house renovations 2 years ago, which included adding two extra rads, replacing others and re-plumbing the boiler , I have suffered from quite loud, (but variable) 'water flowing' hissing noise, which is especially noticable from the first two rads on the system (which...
  17. B

    Secondary Return Pump Noise / Air ?

    Hi, Recently I noticed that we were running out of HW more than expected, perhaps it’s people are taking more baths but I wanted to check out if the pair of Vaillant uniSTOR’s were both heating, thinking that maybe I had a problem with one of the Zone Valves were not heating one of the tanks...
  18. H

    Mixer tap weaker flow when tap turned to maximum

    I have a kitchen mixer tap with one simple lever controlling temperature and flow. The street water was cut off for a few hours. After that, the hot water flow worked as before, but the cold water flow was very weak. With the tap set to cold, if I open the tap about half way, the flow is the...
  19. A

    Any advice on Wickes shower flow diverters?

    We had our bathroom redesigned in 2015. The builder is no longer reachable and never supplied paperwork for the equipment installed. However a wee bit of homework and I have established that the shower (with overhead rainshower and handheld attachments) came from Wickes, their own brand in fact...
  20. M

    Water does not flow trough the pipes

    Hi , i have this situation that once every few months the water stops from flowing from the tank to the house. So i go and disconnect the pipe from the 2nd filter and wait for half minute and water start flowing again. I made a drawing here on the picture to show how is set up. I was wondering...
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