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flow

  1. C

    Removing radiator leaving flow/return pipes open

    Hi. I am about to lay new wooden flooring and replace my skirting boards. I want a full skirting board behind my radiator but to do this I will have to remove the radiator (take it off the wall) - obviously the system has to be depressurised to do this ... my question is this ... I do not...
  2. Grahampowell22

    Hot water pressure dropped on two outlets only (mega flow)

    Hi. We’ve a pressurized megaflow system and the last few weeks we’ve lost water pressure on Just two outlets in the house. The first a Keuco mixer shower were the hot outlets is just a dribble where previously it filled the bath in 5 mins and the second a Quooker tap where the tank fed supply...
  3. B

    How many radiators off a 22mm flow

    Hi all I currently have 6 old radiators (downstairs) off what looks like 15mm pipework. It comes off the zone valve in 22mm and then goes under the suspended floor and is 15mm throughout. It takes forever to heat the rooms and as the radiators need replacing anyway I was looking to upgrade to...
  4. Riley

    Minimum flow and pressure expected

    Evening chaps, I realise that different parts of the country will differ in terms of pressure and flow in coming but is anybody else noticing a trend that guaranteed litres per minute is coming down and down as confirmed by providers? I have two recent quotes both large family houses where...
  5. PennyR

    Continuous Flow Hot Water System - Highest Temperature

    Hey all, I'm setting up a small brewery and need the ability to have instant hot water at decent flow rates. I've been looking at commercial options but I was wondering if anyone can recommend a good unit that can get unto 80? Appreciate any guidance!
  6. H

    Underfloor heating flow direction incorrect?

    Hi All, We're been living in a new build property for the past 2 years without any obvious heating issues. We've an underfloor heating system that's split across 4 rooms, and is driven by a Daikin ASHP. I've occasionally had to take the actuators off in order to release stuck pins after...
  7. garry71

    Rifeng FN5C flow control valve

    I'm looking for flow control valves to fit 2010 Rifeng FN5C manifold (fine-thread?). Is there an alternative out there?
  8. L

    Black flow meters on new CH system

    Hi Is it normal to have very black UFH flow meters on a relatively new manifold (see image)? (Note the two clear flow meters on the LHS are for circuits which are not yet operational, so no water flow through them as yet.) Background is that I have an unvented system boiler CH system...
  9. M

    Restricting flow at tap

    I'm fitting a bathroom basin and the water pressure is a bit fierce, I'd like to reduce the flow at the mixer tap. It's plumbed using JG Speedfit. Can I just use a stopcock or stop valve or service valve to do this job?
  10. G

    Mira Excel (circa 2002) mixer shower no hot water flow

    Hi all, my 2002 Mira Excel mixer shower is only putting out a dribble of hot water, the cold flow is fine and hot water flow to the bath tap is fine, I fitted a new cartridge to this shower around 3 years ago but the temperature ring is noticeably easier to turn on the faulty shower than on the...
  11. S

    Asking for opinion about flow meter concerto

    I'm the homeowner of a heat pump + UFH installation, 2 floors with 1 manifold on each floor and a common pump. On both floors each circuit has the same problem: whenever a zone asks for heat and the motorized valve opens there is a some loud knocking going on (see video). In the case of the...
  12. S

    water flow rates multiple use

    hi all. needing a bit of help please. I do new build properties and have a customer that will not accept a loss of flow rate when using multiple outlets, eg taps restricted flow rate 6 l/min is achieved but reduces to 5 l/min when using two outlets. what i need is the british standard and /or...
  13. A

    Looking for a specific flow meter for UFH manifold

    Hi. I need to get a replacement flow meter as one has split and is leaking. I can’t seem to find the specific one and can’t see a maker on it. Does anyone know where to get one, what it is or any alternatives? Thanks.
  14. J

    My boiler hot water flow rate is slow

    Vaillant Ecotec Pro 28 Running 7 radiators. Outside Tap Cold water flow rate = 12l/s (it took 5s to fill 1l pot) Kitchen Tap - just running cold water = 4 l/s Bristan Shower Mixer - cold water rate = 12 l/s Hot water rate is really low The boiler heats up the water fine -its nice and hot...
  15. J

    Firebird Condensing Oil Boiler Flow / Return?

    Hi all, I am new here and a capable plumbing DIYr. I have just purchased a Fire Bird Silver Boiler House model to replace my old and now leaking Worchester Bosch oil Boiler. The oil condensing boiler instructions have no reference regarding the flow and return connections!! Nor are they...
  16. G

    Reverse flow conundrum

    Hello all, An issue some advice would be great on if you can. Boiler with no leaks, holding pressure fine with a reverse flow FA fault code. If you drain the system and refill, obviously bleeding pump and rads, the whole things runs smoothly for about 5 to 7 days. At a random point it will...
  17. B

    Hot radiator return pipes but warm flow pipes

    Although my CH radiators are hot to touch eventually, I have noticed that one in the downstairs sitting room and probably one of the last to get really hot, has a warm flow pipe and a very hot return pipe. The same applies to some of my other radiators but not all. Is this a balancing issue...
  18. D

    Hot water goes to header tank when powerflushing forward flow,help!

    Hi I have a gravity-fed system I have flushed it out a couple of times and it has had x400 in the system for the last 4 weeks. There was one radiator with stubborn flow left which doesn't heat up enough, it has 8mm pipes which I think is the problem, rather than the rad as I have had the rad...
  19. A

    side flow fill keeps flowing

    Hi, I have just installed a brand new side fill concealed cistern. The cistern fills ok and gently stops an inch below overflow. The float then stop moving up as expected. All seems ok until about 30 to 60 seconds later the outlet slowly starts to drip water which then becomes more steady and...
  20. Ccw1971

    Advice - 15mm gate valve to 22mm flow

    Hi, new member here, so hello! I recently bought a house that needs heaps of work, so have no money and lots to learn along the way. Ive had a new WB 8000 Life 40kw system boiler installed on my gravity fed system. The house is a long bungalow with roof rooms which had no heating so I asked my...

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