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low flow

Baseflow (also called drought flow, groundwater recession flow, low flow, low-water flow, low-water discharge and sustained or fair-weather runoff) is the portion of the streamflow that is sustained between precipitation events, fed to streams by delayed pathways. It should not be confused with groundwater flow. Fair weather flow is also called base flow.

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  1. S

    Low pressure

    Could anybody tell me why a house has very low mains pressure, there are no signs of leaks anywhere in the property, when all isolation valves are closed you can still hear water in the pipe using a screwdriver to my ear ( if that makes sense). When the stopcock is off it all goes quiet, whick...
    • scoop
    • Thread
    • bar compare drainage expansion flow hose inside kitchen leak low flow low pressure noise pipes plumber pressure stopcock supply tap taps underground valve valves water water pipes work
    • Replies: 16
    • Forum: Plumbing Jobs | The Job-board
  2. A

    Combi boiler - enough pressure for shower head?

    I have a SIme Halstead Combi30/90 combi boiler. It says it gives hot water at outputs between 8.79kW (30,000 Btu/h) and 26.4kW (90,000 BtU/h) flowrate seems t be between 8.4 and 10.8 l/min Min DHW pressure is 0.9 bar,max 7 bar The combi is on the ground floor, I have a shower on the first...
    • Atholl
    • Thread
    • aqualisa bar boiler combi combi boiler dhw eco enough fitting flow halstead head hot hot water low flow mixer mixers oil pressure shower shower head sime thermostatic water
    • Replies: 2
    • Forum: Plumbing Jobs | The Job-board
  3. R

    Low flow rates

    Our heating circuit consists of two pumprd circuits one for hot water and one for the main central heating. Pipe runs are long, 50m 25mm total, there and back. The main circuit works fine with adequqte flow to all radiators giving less than 10dec temp drop. The hotwater circuit although...
    • RogerS
    • Thread
    • air boiler central central heating system combi combination cylinder difficult flow flow rate flush hot hot water hotwater low flow pipe power problem pump pumps radiators rates remove sludge valve water
    • Replies: 8
    • Forum: Plumbing Jobs | The Job-board
  4. T

    How To Tell Which Vaillant?

    Looked at the sticky for boiler manuals on here but Vaillant doesnt list many. The boiler doesn't show much info on itself but its about 2 years old apparently and about 2ft square. All it shows are the numbers 18e and 28e? Some old instructions say ecotec AND ecomax pro on them which isnt...
    • Tech
    • Thread
    • bar boiler condensing eco ecomax flow low flow mains pressure pump switch system vaillant vent water which
    • Replies: 3
    • Forum: Plumbing Jobs | The Job-board
  5. A

    Hot water headache

    I am currently working on a Baise combiS.P.A 24s i have hot water on demand in the bathroom but non in the kitchen on the sink which is first in line from the boiler. The flow to the tap is okay,when the bath is on and i turn on the tap in the kitchen the water is hot then when i turn off the...
    • adammason
    • Thread
    • bathroom boiler central heating system connections flow hot hot water kitchen low flow sink tap water
    • Replies: 2
    • Forum: Plumbing Jobs | The Job-board
  6. S

    halsted high ace prob

    got a halsted high ace with a prob on the heating when i turn the heating on the burnner lights up then goes out again i removed the micro-switch from the diverter valve and put it back on and it seemed to work ok for 4 days but now the same problem is back. is the micro-switch on its way...
    • sav
    • Thread
    • ace boiler central heating system circulation diverter valve filter flow high hot hot water inside low flow problem pump switch temperature valve water work
    • Replies: 2
    • Forum: Plumbing Jobs | The Job-board
  7. A

    Hot water stops when cold tap run..

    Can you help, When running a bath with the hot tap running, if i turn on the cold tap, all hot water pressure goes...combi boiler is installed nothing wrong with the hot water...always hot but basically stops when the cold tap turned on..any ideas..thanks
    • aim001
    • Thread
    • bargain bath boiler cheap cold combi combi boiler combination flow hot hot water low flow mains potterton pressure shower stops system tap valve valves water water pressure work
    • Replies: 8
    • Forum: Plumbing Jobs | The Job-board
  8. C

    Positioning pump and zone valves

    Is there a concensus about where the circulator and zone valves should be fitted? On the output from the boiler where everything is very hot, or on the return to the boiler, where everything is supposed to be some 20C cooler Our existing system has everything on the boiler return, but all books...
    • crippo2
    • Thread
    • air baxi bleed boiler boilers combi control flow forum free high low flow open vented pipe plumbing pressure problem pump sealed system valve valves water zone
    • Replies: 8
    • Forum: Plumbing Zone
  9. N

    MicroGenus 23 DHW problem

    This unit is working fine on the CH side, but is erratic with the DHW. At low flow,unit heats water but at low temp and cuts in and out. At higher flow, does not fire up at all. Edit: now DHW failed completely. I can hear flow switch clicking in, but no fire up occuring. Gas and water...
  10. J

    Hot water problem

    i have had a heatline vizo 24 condensing combination boiler fitted. when i turn the hot water tap on full to fill a bath it goes cold when the tap is turned down to a dribble it turns hot again, The only other hot water tap is in the kitchen 2 foot from the boiler but this tap is ok ...
    • johnsom
    • Thread
    • bath boiler central central heating system cold combi combination condensing flow high hot hot water kitchen low flow pipe pipes problem secondary tap van water water problem water tap
    • Replies: 4
    • Forum: Plumbing Jobs | The Job-board
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