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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. S

    Noisy megaflo pressure reducing valve

    hello there, I have a megaflo unvented system everything works fine apart from the prv valve shown on the pic. Every time a tap opens or toilet flashed this prv makes noise. Spoke to guy who fitted the system and he said dont have much to say other than replacing with e new one. Just...
  2. C

    Alternative to PRV for noisy tap

    I've got a mixer tap in my bathroom that makes a noisy "whooshing" sound. It's worse when it's partially on (hot and/or cold). After seeing other forums there is the suggestion the tap is for a low pressure system, opposed to my combi system. I was wondering if there's an alternative to...
  3. Robert Tyrrell

    PRV question ..................

    Just a quick one really - I've noticed a couple of the boilers I've been servicing have the pipe from the PRV running in 15mm copper for a short run and then they exit into a 32mm plastic waste pipe. I've also seen this on a new installation as well. I thought that it had to be in copper all the...
  4. A

    HW Pressure falling after 3 years. Where's the problem? Please help

    Hi Team, I moved into a new build in 2014 and the HW pressure and flow to all taps over the last 3 years has been good. Recently the HW flow rate has fallen gradually to the point where you can no longer really run a bath at an acceptable flow. The initial pressure on opening any HW tap is good...
  5. O

    Commercial boiler prv

    There are pressure release valves or safety valves on some open vented boilers, normally older boilers, are they still required? Is there an input above which they must be fitted? Cheers Mark
  6. gingalig

    PRV terminating over alley second floor

    Hi , Here again, looking for a little advice, I have my probationary Gas Safe interview in the morning and the inspector is meeting me at a property for a service on a worchester 24 cdi, I went to have a brief look today and saw that the PRV is terminating above the communal alleyway, the...
  7. J

    Cap internal blow off (prv) and fit on pipe work instead?

    Hi I'm Gsr by the way and should get around to sending in my card details. I'm working on a system boiler and central heating system and the prv/vessel has recently failed, I'm finding it difficult to source the prv short notice, I'm thinking of capping the Prv inside the boiler or the...
  8. A

    Caleffi PRV leaking again

    Hi all, I replaced the Caleffi PRV (6 bar, 95oC max) on my inlet feet to HWT about 3 months ago, it was a constant drip drip coming from it. The feed to the PRV is from mains water through a Caleffi 3bar filter and feeds the tank CW inlet, nothing too complicated. However just 3 months later and...
  9. S

    Teeing boiler Prv with condense.

    Does anyone combine the boiler Prv with the condense? I always though solvent weld was no compliant as part of Prv pipe run. Any thoughts?
  10. C

    Potterton HE115 constant dripping from PRV into tun dish

    Hi, long term leaking from tun dish, (only recently discovered as the water was being absorbed by the piece of carpet under the boiler) highlighted the fact that water is constantly dripping into the tun dish, presumably from the PRV. I'm about to fit a new tun dish, so hopefully the external...
  11. M

    Screaming hot water pipes after PRV fitted!

    Hi all, I've fitted a PRV due to problems I've recently learnt. Long story short- I have high pressure and low flow, pressure being 10 bar and restricted flow by either crushed pipe or age related debris build up ( my home was built in 1954). Due to finances I can't afford a new water main...
  12. C

    Plumber in Crawley (Replace PRV and Install Nest)

    I have a Megaflo system which has the old version of this part (Heatrae Sadia 95605869/95605021 Cold Water Combination Valve (Megaflo/Megaflow): Amazon.co.uk: Business, Industry & Science) and is leaking from the valve. I need this replacing (haven't ordered) Secondly I have a Nest Thermostat...
  13. Lofty24

    PRV combinations to tundish

    I'm fitting a system that requires 4 T/PRV's I know that i can combing two into the same D1 pipe as long as the D2 is large enough to carry the flow can I combine more than two in to the same D1 or D2 to take it to the drain. Lofty
  14. G

    Prv on flow or return does it matter?

    Just wondered if anybody has an opinion as to why some manufacturers ask for the prv on a sealed system to be installed on the flow pipework rather than the return?
  15. V

    Worcester Bosch Greenstar 24i (installed 2011) pressure dropping & PRV overflow leak

    Hello All My Boiler is dropping pressure and the hot taps are running lukewarm. Pressure was never great..3 floors up so only ever just over 1 bar. I called out the Gas Safe engineer who usually services the boiler and he said that the flat plate exchanger would most likely be scaled up...
  16. M

    Anyone recognise this PRV?

    Would rather not alter pipework if possible! Thanks!
  17. C

    Space to replace a PRV on a Worcester 28CDi

    I'm replacing the PRV on a Worcester 28 CDi, but the space between the red cap and the side of the boiler housing is only about 5mm. The o-ring PRV body is inserted approximately 12mm in to the clipped housing. Does it slide out when the union is unbolted or is there further dis- assembly...
  18. finchy01

    PRV constantly going

    Before I just check another PRV in I just wanted to get any other thoughts. Went to an invented cylinder the other day as PRV constantly flowing with hot water (not boiling). I repressurised the external vessel as this was totally flat and replaced the 2 ports as it had failed and stuck in...
  19. P

    Can't unscrew pressure relief valve prv, combi boiler, please help!

    Hello there, would be very grateful to get some help on my copper pipe dilemma. With reference to the attached image, when unscrewing the valve (to be replaced with a new non-leaking one), the male pipe (on the right hand side) it is screwed on to rotates as well as if the two are stuck...
    • Pad04
    • Thread
    • boiler can't combi combi boiler help oil please pressure pressure relief valve prv relief unscrew valve
    • Replies: 3
    • Forum: Plumbing Jobs | The Job-board
  20. R

    Worcester 28i Junior prv blowing after replacement

    Hi the boiler had been losing pressure for some time so we kept topping it up. We diagnosed that the prv had gone because it had been blowing and the expansion vessel had gone because it was letting water out instead of air. We replaced the prv and attached an external expansion vessel. We...
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