Pressure release problem....

[sammathias]

Glow worm betacom 28 not holding pressure changed prv twice with prvs I had in-stock....literally top it up to 1.5bar and it will drop immediately through prv. Don't know if I'm being thick but must be a crack or something in the hydro location I can't see. They are over £100. Can I just cap existing prv and fit an external prv on pipework? Is that acceptable?

 

[ShaunCorbs]

Does the boiler have valves ?

 

[sammathias]

Yes mate...so a no then as if the boilers isolated bang bang..

 

[ShaunCorbs]

Yep sorry to say needs to say unless they do a remote kit like Worcester which removes the prv

 

[sammathias]

Managed to finally source a part number and order part. Was only £26 next day delivery. Still an expensive but of plastic.

 

[Scott_D]

Could the pressure gauge be goosed?
Reading 1.5 but actually 3 bar?

 

[sammathias]

I thought this but no because it completely empties the boiler... It seems like the prv isn't seating properly. Can't imagine I have two genuine prvs faulty so can only really assume it's the bloc?? Couldn't see anything obvious tho.

 

[Gary80gas]

The pr valve must be holding if you can pressurise to 1.5 bar? Does it discharge before you call for heat? Can you see where it is discharging.
Does it bang as it discharges indicating pressure spike or quietly run out. If it runs quietly I would assume the prv is still defective.

 

[dancinplumba]

pipe existing prv into return and fit remote prv

 

[sammathias]

Slow trickle out of prv whilst pressurising system. It will go upto 1.5bar but just trickle back out to nothing within 30 seconds. I ended up changing the whole hydrobloc which cured the problem. Can't see any obvious split in hydrobloc tho.

 

[Harvest Fields]

Was it the rubbish black plastic one that pinhole?

 

[sammathias]

Was it the rubbish black plastic one that pinhole?

Yeh never come across one pinhole before tho. First time for everything

 

[Harvest Fields]

Yeh never come across one pinhole before tho. First time for everything

Normally they pin hole outward and cover everything with water.