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Discuss Boiler not filling issue. in the Boilers area at Plumbers Forums

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Ozington

Hello Chaps,

My first time here bringing my boiler issue.

The summary is:

My boiler is currently showing approx .75bar, there is air in the radiators as you can hear it and it seems to bleed for days then stop, but no water bleeds. Eventually the tallest radiator did bleed water, but then a different radiator would bleed air until nothing came out.

When filling the boiler from the filling loop, it fills for about 2-3 seconds, then immediately starts pouring water out of the PRV.

From my vast experience (read: Google) it sounds like it is either the expansion vessel, or the PRV. It seems very simple to replace the PRV, but any advice would be welcome.

The boiler is an old Vailant Turbomax 28/2e.
 
Sounds like either the prv is faulty or gauge is faulty best to get a gas safe Eng out
 
Can I replace the PRV myself? It seems pretty simple to drain, one clip and one nut?

Oz.
 
Can I replace the PRV myself? It seems pretty simple to drain, one clip and one nut?

Oz.

I would say no as I think you need to take the boiler case off
 
The PRV on mine actually sticks out below, mine is completely open underneath and wouldntt need to open anything up at all to change it.

I'm not an engineer by any standard, but am relatively confident! I think for the cost of £10 for a new one it seems worth giving it a go. Will turn gas and boiler off completely first, what could go wrong!
 
The PRV on mine actually sticks out below, mine is completely open underneath and wouldntt need to open anything up at all to change it.

I'm not an engineer by any standard, but am relatively confident! I think for the cost of £10 for a new one it seems worth giving it a go. Will turn gas and boiler off completely first, what could go wrong!

If that was the only issue I would say ok but as you got a few more best to get a hesting eng out
 
No point replacing PRV if tanks are faulty, same thing will happen
 
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