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Old 11-12-2017, 09:25 PM   #11
wanner69
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Quote:
Originally Posted by dholdi View Post
There could be 2 pipes to outside, the prv and the condense, although it is acceptable to run the condense to an internal drain. I prefer internal as there is no risk of it freezing but sometimes its not practical.
The prv should be in copper and the condense in 21.5mm plastic internally changing to 40mm plastic just before it goes outside if it does. Some installers route the prv to the condense drain which is a bit naughty.
Mine is copper that goes through the wall to the outside buddy.
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Old 11-12-2017, 10:09 PM   #12
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I have a 28i and had exactly the same problem which was fixed when the plumber changed the expansion vessel
The outside pipe was dripping when the pressure went high.
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Old 11-12-2017, 10:27 PM   #13
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Worcester boiler problem

If you’ve ruled all that out, you have a leak somewhere on the system. We had tiny leak on a pipe where a floor board had been rubbing it


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Old 11-12-2017, 10:56 PM   #14
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Originally Posted by wanner69 View Post
The prv will only lift when and if it over pressurises doesnt it? Is this the pipe from the prv that goes through the wall to the outside of the house? That does drip occasionally.
Yep thats the one , it shouldnt drip,mit means the valves passing.
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Old 12-12-2017, 07:32 PM   #15
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Thanks for all the replies guys much appreciated. After further investigation I do in fact have water coming out of the valve in the expansion vessel so I will order a new one and get someone to fit it. Looks a pig of a job for access.
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Old 12-12-2017, 07:42 PM   #16
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Originally Posted by wanner69 View Post
Thanks for all the replies guys much appreciated. After further investigation I do in fact have water coming out of the valve in the expansion vessel so I will order a new one and get someone to fit it. Looks a pig of a job for access.
Before you do that, ask about fitting a generic EV elsewhere in the system.

We had an Ideal Isar boiler which had a faulty EV and not only is it ridiculously expensive, half the boiler has to be dismantled to get to it.

Our plumber got a standard EV from somewhere like Screwfix and installed in in the loft, leaving the existing one in place.

I think it has to ideally be installed on the return pipework IIRC but doing it this way was far easier and far cheaper.
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Old 12-12-2017, 07:46 PM   #17
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Quote:
Originally Posted by staffordian View Post
Before you do that, ask about fitting a generic EV elsewhere in the system.

We had an Ideal Isar boiler which had a faulty EV and not only is it ridiculously expensive, half the boiler has to be dismantled to get to it.

Our plumber got a standard EV from somewhere like Screwfix and installed in in the loft, leaving the existing one in place.

I think it has to ideally be installed on the return pipework IIRC but doing it this way was far easier and far cheaper.
Thanks for the reply mate. I have read about fitting a second EV so I will discuss that with the plumber tomorrow cheers
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Old 12-12-2017, 10:49 PM   #18
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Ian's solution is a good one if you can find the room for the vessel.
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