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flow

  1. K

    Glow worm Ultimate 35c low flow rate

    Hello, I have a glow wrom ultimate 35c combi boiler which has terrible flow rate. Flow rate used to be strong but one day around 2 weeks ago it just slowed to almost a dribble. To date i have replaced the flow rate sensor, the pressure sensor, I have replaced the springs inside the diverter...
  2. S

    Is my flow adequate? What should I expect?

    Hi all, first post so go easy, looking for a bit of advice please. I have approx. 18L/ minute flow rate mains at the stopcock with 2 bar pressure. worcester Combi boiler approx 28kw, downstairs shower gives 7 L / min without showerhead and no other hot taps on. can’t turn on two hot taps...
  3. A

    Polypipe UFH Flow meters - does anyone know the measuring scale?

    Hi all. I have a Polypipe UFH manifold with flow meters for each circuit. I’ve worked out the pipe length and know what flow rate to achieve BUT the flow meters do not have any scale. All I have is min (top) and max (bottom) and nothing in between! The Polypipe product code is PB129FM for the...
  4. B

    Pressure Drop with Hot Water flow - Ideal Vogue S32 Gen 2

    Hi there, I have a Vogue S32 Gen 2 in an empty rental property and noticed that the Boiler Pressure Gauge was high at about 3 bar. It may be that the old Tenants over pressured it with the filling loop, as I’ve certainly only filled it to 1.5 bar historically. I drained down the CH water...
  5. P

    No flow in heating system.

    This is perhaps a long shot, but anyway... I live in a block of flats in Beijing, and the heating is provided by a metropolitan heating system. The block's system seem to be split into two - top 10 floors and the lower 10 floors are heated separately. My flat is on the 10th floor, and our...
  6. P

    Heating extension - Multiple Flow / Return Tee's very close to each other

    HI, We are just finishing an extension thats been built and the heating pipework has now been run in. The pipework is for three new Rads, two column ( two rather than one big one ) and another rad in an en-suite. Pipework from original supply is all 22mm ( as per original supply ) to the first...
  7. R

    Worcester Greenstar 38cdi Classic Combi Minimum Flow Rate

    Hello there, I'm wondering if anybody can advise me, please. I'm in the process of switching my thermostatic radiator valves to Drayton Wiser valves. I currently have one radiator fitted with lockshield valves as a bypass, but I would like to put a Wiser valve on this as well and incorporate...
  8. Stants

    Unvented Water pressure and flow question

    Hi I'm having a new System ( Unvented 210 Evocyl cylinder and Worcester bosch boiler greenstar ) I've got one bathroom, bath ,sink and toilet and a shower and toilet , sink in another I think that's deemed as 1 and a 1/2 bathrooms ive done a flow and pressure test ( details on an earlier post...
  9. C

    No flow through UFH?

    Hi Guys, see attached pics. Can anyone help with the following issue; I had UFH system installed last year for my kitchen extension, the system was working ok when the plumber finished but as it was completed in the summer months the system was left off until required during the winter months...
  10. B

    Water flow rate bathtub query

    Hi everyone just looking for some advice regarding water flow rate: Live on 2nd floor flat Boiler: Vokera Easi heat 25 combi boiler Water supply: Incoming water for hot and cold water is via the mains water supply Boiler on kitchen wall is about 10 metres from bathroom Does this seems about...
  11. MrGatch

    Central Heating Flow Rate (Rads+UFH)

    I have a house over three floors with three heating zones. Ground floor is UFH and newish, the 1st and second floor are radiator zones. Historically the radiators don't get very hot on the top floor, however I've just switched them on for the first time since last winter and they are the best...
  12. 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...
  13. 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...
  14. N

    Different flow rates on ground floor

    Hi, I've bought a four bed house, it's about 20 years old and has an adjacent garage. It has a downstairs toilet, utility room and kitchen and upstairs there's a main bathroom and an ensuite shower room. It has a vented system with boiler in garage heating cylinder on landing and a 40 gallon...
  15. 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...
  16. 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...
  17. 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...
  18. 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?
  19. 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...
  20. 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...

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