Help me stop this darn water please.

[AverageDIYerEssex]

I am assuming the cold mains in is the pipe labelled as if it was the one to the left of it, the ball valve would only isolate the feed to the house but not the boiler.

The cold feed appears to come into a ball valve, then T's. DOWN I assume to feed the rest of the house (cold water in house shuts off when the is closed) and UP goes into an inlet control which appears to be set to 2.5 bar. This has an escape to a tubdish and a main outlet upwards. This outlet then T's, UP to the EV and RIGHT which bends downwards and goes into the DHW Mains Cold Inlet.

I have heard Potterton boilers are a 'nightmare' which seems to be the case. But from my little knowledge yes it appears the EV is on the cold side and regulates pressure BEFORE going into the boiler.

 

[dilalio]

You are confusing things by referring to the UV cylinder as "the boiler"

yes it appears the EV is on the cold side and regulates pressure BEFORE going into the boiler.

Your sketch is much better and, if that's how it is piped, whilst not the best setup (hot and cold not balanced) is OK.

I would isolate the inlet and drain down and recharge the EV before anything else. Unless there is another cold feed somewhere, this is what is causing the pipes to continue to trickle.

Yes, you can cut a lever valve into the hot outlet but you'll still get water flowing whilst you do it.

Turn the house mains off and just leave all taps open for as long as it takes to stop. Then put a lever valve on the UV hot outlet.

But, pretty sure that vessel is depleted.

 

[AverageDIYerEssex]

You are confusing things by referring to the UV cylinder as "the boiler"



Your sketch is much better and, if that's how it is piped, whilst not the best setup (hot and cold not balanced) is OK.

I would isolate the inlet and drain down and recharge the EV before anything else. Unless there is another cold feed somewhere, this is what is causing the pipes to continue to trickle.

Yes, you can cut a lever valve into the hot outlet but you'll still get water flowing whilst you do it.

Turn the house mains off and just leave all taps open for as long as it takes to stop. Then put a lever valve on the UV hot outlet.

But, pretty sure that vessel is depleted.

ahhhh I'm sorry. This Potterton is a boiler and cylinder in one so yes I was referring to it as a boiler. Sorry. Didn't help when I googled UV all that came up was 'ultraviolet'. Now I realise you meant 'unvented... cylinder' my bad.

Thank you so much. I think I'll do both.

Am I right in assuming I should drain the system as you say till nothing comes out, then pump up the EV? I've seen someone do it with a bike pump is that ok? Do I need to wait until it's fully discharged of water to do it and is there a set pressure to pump it up to?

I'll put the lever in the outlet whilst it's drained down

Sorry for the number of questions just want to limit the amount of times you need to reply to me ‍ I do really appreciate your help though.

 

[dilalio]

This Potterton is a boiler and cylinder in one so yes I was referring to it as a boiler.

Is it?
Do you have a gas boiler or just the cylinder with electric immersion heater elements?

If you have immersions only, then it is known as a "Direct unvented cylinder" not a boiler.

Either way, I can't advise you on what to do as it comes under regulation which needs G3 ticket. It involves safety devices which must be confirmed to be operational and system safe to use.

Not trying to be awkward, just observing the rules.

 

[AverageDIYerEssex]

Is it?
Do you have a gas boiler or just the cylinder with electric immersion heater elements?

If you have immersions only, then it is known as a "Direct unvented cylinder" not a boiler.

Either way, I can't advise you on what to do as it comes under regulation which needs G3 ticket. It involves safety devices which must be confirmed to be operational and system safe to use.

Not trying to be awkward, just observing the rules.

Ohhh no that's absolutely fine I understand.

No it is a gas boiler and cylinder all in one. Obviously has the electrical immersion as a backup but it's an all in one. Most people who work on them say they're horrendous though lol. But it's what was in the house when I moved in.

Potterton Powermax HE if your interested.

 

[dilalio]

Ohhh no that's absolutely fine I understand.

No it is a gas boiler and cylinder all in one. Obviously has the electrical immersion as a backup but it's an all in one. Most people who work on them say they're horrendous though lol. But it's what was in the house when I moved in.

Potterton Powermax HE if your interested.

I know the beast!

Eeuuughh!

Isolate the mains, it should stop eventually then cut a lever in, but get the UV / EV serviced.

 

[AverageDIYerEssex]

I will do mate. Thanks for all of your help!!!

Don't suppose you know anything about air vents for toilet stacks do you? lol. Got another feed linked below if you do.

Sewer pipe air vent question

Hi all. Do I am fitting a new bathroom upstairs and changing the position of the toilet. Long story short I am loosing the old soil stack that serviced this bathroom and plumbing it into a now disused downstairs WC hole in the ground (which leads to the same sewer connector) I have just...

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