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prv

The V6 PRV engine is an automobile petrol V6 engine that was developed jointly by Peugeot, Renault and Volvo Cars – and sold from 1974 to 1998. It was gradually replaced after 1994 by another joint PSA-Renault design, known as the ES engine at PSA and the L engine at Renault. It was designed and manufactured by the company "Française de Mécanique" for PSA, Renault and Volvo.

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  1. B

    Pressure Relief Valve Overflowing & Grundfos MQ Pump pressure

    I have a Grundfos MQ series domestic pump and it has started cycling on and off. The pressure at the outlet reaches approx 2 bar of pressure and the pump shuts off. The pressure then immediately drops as it overflows out of the Pressure Relief valve. Once the pressure gets to 1.5 bar the pump...
    • Blackrock63
    • Thread
    • america grundfos overflowing pressure pressure relief valve prv pump relief urgent usa valve
    • Replies: 1
    • Forum: USA
  2. P

    Why is my mains water PRV not maintaining 3 bar?

    Hi all, I had a problem recently with the pressure to the house exceeding the 3 bar that the caleffi pressure regulator was set to. The gauge on it indicated that static pressure would sometimes increase to 6 bar; it's not just a gauging issue because the HW cylinder next to it starts leaking...
    • PeteCUK
    • Thread
    • america bar mains prv usa water
    • Replies: 27
    • Forum: USA
  3. P

    Monza heatline hot water issue

    Good evening , Heatline monza, pressure gauge rises and reacts as if air hitting the exchanger, boiler cuts out then back on it then opens the prv. This only happens when there is a demand for hot water. Heating seems to run smoothly with minimal increase in pressure. I checked expansion...
  4. B

    PRV valve loosing pressure. Just replace..again?

    Hi, We have a Glowworm 38CXI combi boiler. Back in September last year I noticed that it was losing pressure and I was having to re-presurise it almost daily. From looking outside I could see the pipe coming from the PRV valve was leaking quite a bit. As such I got a plumber in to check over...
    • busbyuk
    • Thread
    • america loosing pressure prv usa valve
    • Replies: 7
    • Forum: USA
  5. Bottom

    Leaking Overflow from Baxi DuoTec Combi 28 HE A. is it faulty PRV ?

    Leaking Overflow from Baxi DuoTec Combi 28 HE A. Is it a faulty PRV ? Pressure gauge is showing zero so no central heating or hot water. When I try to re-pressurise by opening the fill valve, the gauge will only rise to just over one bar and the CH will then work. BUT... all the water rushes...
  6. S

    PRV and condense discharge form a combi boiler

    Good day all, First and foremost i am not a boiler installer or gas registered, therefore i do not touch this element of plumbing, but i am after the correct advise regarding the following issue. I have had a gas installer who has piped the PRV and condense discharge pipe from a combi...
  7. B

    PRV let by Calefi 6 months old

    Hello all. I have a calefi multibloc . The PRV is letting by. Only installed 6 months ago by another firm. This was the second replacement in 18 months. Any ideas as to why? I don’t want to replace it if another fix is possible I do have my unvented but usually just do installs. Thank you in...
    • Boilerfix
    • Thread
    • america months old prv usa
    • Replies: 9
    • Forum: USA
  8. O

    Fluctuating cold water pressure up from PRV

    Hi, we're experiencing fluctuation readings in a PRV here's the story: Cold water into premises is 7 bar. This runs unregulated to four outlets: Kitchen sink Outside tap Washing machine Dishwasher The cold water to the first floor runs through a PRV set to 3 bar. This then supplies: Central...
    • OGRI
    • Thread
    • america cold cold water pressure prv usa water water pressure
    • Replies: 11
    • Forum: USA
  9. Y

    New combination PRV is humming loudly

    Hi, I have just replaced the combination pressure reducing valve on the inlet to my unvented got water cylinder. The new valve is exactly the same model as the old valve, but hums very loudly when any hot tap is turned on. The only time there is no humming is when a tap is fully open. You can...
    • Yduck41
    • Thread
    • combination humming new prv
    • Replies: 5
    • Forum: Australia
  10. R

    PRV whining noise

    I know that there are some posts already on this subject but our situation is slightly different. Most other posts indicate that the whine occurs when a tap is turned on but our noise is present at all times even when there is no flow of water through any taps etc. We have two PRVs fitted one...
  11. Ray Stroud

    Fitting a PRV in a tight space.

    I'm about to replace my house stopcock (gatevalve) with a new one (Pegler Lever Ball) and thought I'd take the opportunity to add a Honeywell D05F Pressure Reducing Valve and a Fernox Electrolytic Scale Reducer. However, 'the book' says the PRV must be followed by a straight length of pipe...
  12. A

    Caleffi Pressure reduction valve causing noise

    OK I have recently installed a Caleffi PRV to a 28mm pipe. Incoming pressure I am informed by local plumber is 7 bar and I have reduced this to 3 bar. The trouble is that the prv is causing a nasty vibration/humming noise when using any of the taps or shower down stream of the unit. Any ideas
  13. Ted808

    Keston C35, pressure drop, no leaks

    Hi another head scratcher..... Fella has a relatively new boiler- 3yrs old and the system pressure was being lost and he topped it up. Frequency increased to 2xday and then he called me... Been there, basement installation hence the keston twin flue, condensate is pumped, prv into a saniflo...
  14. Pickwickpick

    PRV discharge pipework rendered into the wall

    So, noticed this afternoon that the same jokers that filled my customers drains up with render (posted some pics in Matchless Plumb's "good or bad idea" thread) have also rendered the PRV discharge from the combi into the wall. Its a quick fix, just needs the end of the discharge hacksawing off...
  15. B

    Does PRV have to be next to megaflo

    Have a customer with a leaking prv on the cold water set for a megaflo. He wants it removing, as he has had a prv fitted on the incoming main to the house - apparently by someone from megaflo ( not sure if he’s got that right). What I want to check is; can there just be a prv on incoming main...
  16. M

    Replaced PRV and still leaking

    the PRV has been replaced twice in the past few months and this seems to cure the leak temporarily, however the leak is now worse and is clearly caused by a different problem. The pressure gauge rises quickly upto 3 bars, (we release the pressure manually) but then when the heating/water is off...
  17. M

    Worcester 30si dripping Prv

    Afternoon, I have a Worcester 30si and the Prv is dripping so constantly topping up. When I run the hot water the flame comes on and the pressure gauge goes up. The boiler goes off and works again after around 30mins. Any views as to what is going on? Many thanks Mo
  18. D

    Adjusting the PRV to go to 4 bar..?

    We've installed a new 25mm water mains in to replace a led mains in and the pressure is so high we've had to put pressure reducing valve on and cap at 3 bar. The flowrate from the tap is about 10 litres per minute but we're expecting at least 15l/m. The taps/showers are rated to 3bar but I want...
  19. T

    High temp prv & condense pump

    Hey guys Iam fitting a boiler where the prv and condense will be removed by a high temp pump. Question is... does the the pipework that takes the condesate/prv have to be pipe in high temp plastic waste pipe? Like on an invented cylinder
  20. L

    Boiler prv and expansion vessel

    Hi. I’m looking for some advice. I recently bled my radiators then over pressurised the boiler (one of the filling valves got left open) this led to the prv opening and draining water. I got a plumber out and he said the valve didn’t reseat properly due to debris in the pipe so he flushed some...
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