Is it hard to change a dripping PRV from a boiler in general? Are they threaded or compression fittings??
PRV change
- Thread starter jacobball
- Start date
seen threaded
seen compression
seen o ring type secured with a grub screw
boiler make and model would be a starter for ten
seen compression
seen o ring type secured with a grub screw
boiler make and model would be a starter for ten
it's not a boiler, sorry, it's a sealed system package, the expansion vessel, prv, filling loop and gauge are all together in the airing cupboard.
threaded
ok, thanks. so if threaded, do i just wrap ptfe tape around the threads like for a bib tap? as the system is pressurised will this need to be very tight to stop a leak?
tighten it as tight as you would tighten a bib tap
as the bib tap would probably be on mains water
ptfe.....yes
as the bib tap would probably be on mains water
ptfe.....yes
It sounds like unvented cylinder,this is safety critical device and may be leaking for a reason and needs to be checked over by someone who is competant and qualifed to do so
Its not good idea to give advice to someone who has no understanding of prv and asking such basic questions
You really need to call in G3 qualified installer to check this out
Its not good idea to give advice to someone who has no understanding of prv and asking such basic questions
You really need to call in G3 qualified installer to check this out
sorry, yes of course, plenty of ptfe and hawk white then.
the bib tap, when you screw in, you tighten as much as can but sometimes ends at a funny angle so you move back about 1/2 of a turn etc to get it square on, this can be done the same for the prv then??
the bib tap, when you screw in, you tighten as much as can but sometimes ends at a funny angle so you move back about 1/2 of a turn etc to get it square on, this can be done the same for the prv then??
sorry it is not unvented cylinder it is on the primary circuit, the header tank and feed was removed a few years ago. the prv was twisted a while ago, and dripped ever since.
I do understand how unvented works, you have the expansion vessel or bubbletop, and if this discharged when h/w is heated it is an expanskion problem, if all the time then a pressure problem etc (or a few other things)
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A prv on the primary circuit!!! 
...I think we need a photo
...I think we need a photo
it is part of a composite kit, it has the filling loop connection / gauge and expansion vessel all connected, and where the old feed and vent from the f & e came in, it has been fitted there and the feed/vent cut/capped.
View media item 18779
something like this
something like this
If as picture suggests check vessel pressure,,,,,depressurized. Plus is old valve full of XXXX. If so will only happen again ,,,,so cleanse
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