Welcome to the forum. Although you can post in any forum, the USA forum is here in case of local regs or laws

flow

  1. MrGatch

    Flow/Return Colour Codes

    Are the any standard colour-codes or conventions for labeling central heating, water and gas pipes? I'm looking at insulating the pipes in my cellar and am considering marking up the flow/return and H/C water pipes as I'm going along. Appreciate that yellow is for gas and possibly red/blue for...
  2. B

    TMV/water flow boiler Query

    Hi everyone, I contacted the boiler company about the DHW temperature control as there is no LED to indicate the temp so have used a digital thermometer to see how hot the water is as sometimes when I run any tap or the shower the water temp changes cooler/hotter when the tap is running. The...
  3. A

    HOW TO INCREASE FLOW RATE & PRESSURE 3 BED SEMI

    Hi all I have a 3 bed semi work in progress at the moment. It's fed off of a 15mm incoming copper water mains pipe which then branches off in 15mm pipe to feed the bathrooms, boiler, kitchen etc. It already has a Worcester Greenstar 28i Junior in good nick on the 1st floor landing cupboard, a...
  4. T

    flow and return for radiator

    Hello, I have a Worcester Greenslave 12/18, and I am about to change a radiator. At the moment the rad is fed by the same pipe, the feed I think, but as the return pipe runs right next to it, can I plumb the rad into the flow and return without causing problems for myself? Will this work, or...
  5. A

    Unvented Question (flow/pressure related)

    Hoping someone can sanity check me! Bit of a project house - had an unvented cylinder fitted in the loft around a year ago. Gledhill horizontal, Worcester system boiler as well as wet underfloor throughout. As part of this we had a new 32mm MDPE mains fitted. This enters the house and reduces...
  6. O

    Loading unit flow rate Vs simultaneous use flow rate

    Do any one know why flow rate given by loading units calculation doesn't match for simultaneous use?
  7. S

    Max distance for 10mm tails off 22mm flow and return

    I’m considering my options for moving (JG) pipework from an inaccessible place whilst the floor is up. One option might be to use 2 x JG 4-port manifolds, mounted in a much more convenient location. But, this would mean adding 2 - 3 metres to the 10mm tails (off flow and return) and i’m not sure...
  8. P

    Leaking flow pipe on Baxi 105e

    Hi, I've got a leaking flow pipe coming from the main heat exchanger. There is slow drip where it connects onto the main heat exchanger. Before I take it all apart could someone tell me if it's better to replace the whole flow pipe or can I just change the seal on it?. Kind regards, Joshua...
  9. M

    combined toilet bidet back flow prevention

    customer would like combined toilet bidet fitted, spray is fitted to the pan, not hand held hose, she has unvented system. does anyone know what back flow prevention can be used ? are check valves on supplies to the mixing valve sufficient ? wras advice seems unclear for unvented systems. thanks...
  10. Scott_D

    Isolation valve flow limits?

    I know it depends on pressure but is there a rule of thumb limit to the litres per minute that can pass through a cheap 15mm isolation valve?
  11. Milan5baros

    HELP - Back to back WC's issue with cross flow

    Morning all, Struggling to resolve a problem. Back to back WC's in a fourth floor flat and the waste from toilet A(main bathroom) transfers into toilet B (ensuite) we have installed the McAlpine ARB 1 anti-cross flow valve on each side but it has only stopped solids and there is still some...
  12. G

    Warm flow combi boiler /No hot water

    Need help please... My Warmflow oil fired combi boiler will not supply hot water to my domestic taps but the central heating works fine. This is a dual pump system. I have linked out the connections on the boiler stat which causes the hot water pump and system to work and able to get very hot...
  13. L

    Will lowering water tanks by 15cm have any noticeable effect on gravity flow system?

    Hello, I live in a building that is a conversion of two terrace houses into several flats. We have 7 levels (basement, ground, 1st, 2nd, 3rd, 4rth, and 5th), and each level has two flats, except for the 5th floor, which is the attic and on one side there is a small studio and on the other side...
  14. G

    Vaillant ecoTEC Plus 938 - Low Flow Rate

    Hi guys. Hope you are able to help me, and thank you in advance for anyone who can contribute. I've got a Vaillant 938 and notice that the hot water output isn't near the claimed flow. I've tested the pressure at the stopcock and it's around 3 bar. I've tested the cold flow rate from the...
  15. J

    Dropping flow rates over time.

    Hi folks. I'm looking for advise for troubleshooting dropping flow rate that I could look into myself until we are up and running and I can get a professional in. Over the last 6-8 weeks I've noticed that our water supply is dropping in flow rate and today I measured a tap running at 3.5...
  16. 2

    Recessed Shower Valve No Flow

    I've just fitted the recessed dual shower valve photographed. Flow was fine until I went to calibrate the temperature this morning, so twisted the bottom cartridge and adjusted the flow on the isolator valves. now there is no flow out of the head at all (isolation valves fully open) having put...
  17. S

    Low pressure/low flow

    Hi All, I live in a 400 yr old house although the pipework is only 3yrs old from the internal stopcock. I have a low water pressure / low flow problem that I wish to sort out. It's a 25mm incoming pipe stepped down to 22mm internally which then reduces to 15mm into the various taps. I have a...
  18. 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...
  19. 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...
  20. J

    Central heating flow/return 3 bed terrace - 15mm or 22mm

    My son has a 3 bed terraced house and a damp patch on a ground floor timber floor/wall that I think is caused by a pin hole/failed joint in the copper pipe. Rather than just do a localised repair I intend to replace all the ground floor pipe. The exisiting setup has 22mm pipe dropping down from...

We recommend City Plumbing Supplies, BES, and Plumbing Superstore for all plumbing supplies.

Featured Content

Back
Top