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Dont know where these valves are, so no danger of me touching them :D . Thanks guys for the heads up on that one. When I do it I'm going to bleed the radiators, screw down auto air vent, drain boiler with the PRV, fit new PRV, then re- pressurise to 1 1/4 BAR ( as suggested in a previous post)...

There is no water leaking anywhere within the boiler or the pipework directly underneath. TBH I'm a total novice at this and dont know where the isolation valves are!

Tried it, but it didn't work for me unfortunately.

Thanks mate. You've been a great help :D

Thats great. Ill give it a whirl when I get the part. I know where the auto air vent is, but when you say screw it down- is there a screw to turn on it or something?

Thanks again. The instructions with my boiler tell me to 'drain the central heating circuit' - that means just the boiler then and not the whole lot including radiators?

It was your advice on filling the EV whilst holding the PRV open that seems to have done the trick ( so far so good anyway). Thanks a lot for your help. Have you any experience in fitting a new PRV? The part looks easy to fit- (one side threaded and the other a push fit), but its more the...

Okay, I had another go at pressurising the EV. This time I held the PRV open whilst I pumped some air in ( .8 Bar). The water pressure stayed at zero this time. Now the system is running well, going from 1 1/4 cold up to 1 3/4 Hot. The PRV is still dripping though. Can someone tell me the...

Actually, it is dripping all the time- about 1 drip every 5 seconds when cold. It's only about a tenner for a new PRV- is the procedure for fitting quite straightforward?

Thank you for your help. If the PRV is faulty, will there be a drip all the time, or only when the heating is on? At the moment it drips whilst it is on, but not when off and cool.

I have identified the pipes that are beneath my system. They are, from left to right -CH flow, DHW out, Gas inlet, mains cold water in and CH return. The CH flow and the Mains cold water in are linked together by a flexy pipe. Is the one I need to drain the CH Flow?

Okay thanks. There is a flexible hose that links two of the pipes beneath my boiler. One of the pipes fills it up, so Im guessing the other is the return which I could use to drain the boiler.....

Do you know if a drain cock is usually fitted inside a boiler, or on the pipework somewhere?

Any idea where a drain valve is on this system? The only thing I can see with a tap on is on a flexible pipe that loops between two copper pipes- that fills it up though :?

What I forgot to put was that after testing the EV for the second time and finding hardly any air in it, I operated the PRV to remove the water pressure before pumping up for a second time. I know that you shouldn't operate the PRV, but as its been opening all the time to releave the pressure I...

Oops, no I didn't open any drain valve :oops: What should be my next step? ( apart from calling a plumber!)

I have had a problem losing pressure from my combi boiler system - I have to top it up on a daily basis. I have a Worcester 24i RSF. When the pressure rises There has been water coming out of the PRV pipe outside of the house ( this doesn't happen when the system is cold) I have checked my...

Nice idea, but don't really want to spend £68. My £1.50 switch is now working fine. Thanks for all help. :D

Can't get to the cord either without moving tv

Many thanks (once again!) Rocky. :D