Leaky boiler.

[Neilj]

In that case it's dead, diaphragm will have failed

Just leave it in place with the valve cap fitted so it doesn't leak and plumb in an external one

 

[Matrixx]

You need to size the pressure vessel to the size of your system, it might be easier just to replace the one thats in there if you can, i did it on one of my previous boilers , no need to touch the gas part. if not an external tank , just tee it in close to the boiler. it must be pressurised disconnected from the system, and set just under the pressure you want to run at, so as the pressure increases it absorbs the increase , if the tank is to small the pressure can still rise. also worth checking the fill valves, they can leak causing pressure over time.

 

[Kayos]

You need to size the pressure vessel to the size of your system, it might be easier just to replace the one thats in there if you can, i did it on one of my previous boilers , no need to touch the gas part. if not an external tank , just tee it in close to the boiler. it must be pressurised disconnected from the system, and set just under the pressure you want to run at, so as the pressure increases it absorbs the increase , if the tank is to small the pressure can still rise. also worth checking the fill valves, they can leak causing pressure over time.

On the ops boiler you have to remove the boiler from the jig, this includes removing that flue elbow and disconnecting the gas

 

[Bryan Williams]

What would I be looking roughly at for a new vessel, easy access on this?

 

[Neilj]

Were you thinking of DIY or getting a plumber out?

 

[brightspark]

Were you thinking of DIY or getting a plumber out?

a bank loan if its a plumber

 

[Kayos]

Honestly, given the risk of damaging the many plastic parts inside that boiler, i'd be looking £600 plus a disclaimer that it will be more if one of the hydroblocks fails during removal or refitting

 

[gaz1]

What would I be looking roughly at for a new vessel, easy access on this?
View attachment 386104

on that it would be either above the flue and tee in on the pipes

or tee in and go below into the cupboard if fitting in close near the boiler but you dont have to do it can be fitted elsewhere

the rule of thumb is try and fit it as close to the boiler as possible

 

[Bryan Williams]

Were you thinking of DIY or getting a plumber out?

Can't do it myself as the vessel is goosed, so apparently the boiler has to come off so it's a gas safe guy /gal.

 

[reb78]

Can't do it myself as the vessel is goosed, so apparently the boiler has to come off so it's a gas safe guy /gal.

Bryan - everyone has said to leave the knackered one in place and fit a new one elsewhere on the system. Taking the boiler off risks breaking other parts and is a longer job anyway.

 

[Seadog]

It doesn't matter where it is on the system. You can pick up a PV and all the bits for £100 or so.

 

[Neilj]

Were you thinking of DIY or getting a plumber out?

Can't do it myself as the vessel is goosed, so apparently the boiler has to come off so it's a gas safe guy /gal.

My DIY / plumber question was related to your post #44 which I presume was asking about the rough cost of an external vessel?

 

[Bryan Williams]

Honestly, given the risk of damaging the many plastic parts inside that boiler, i'd be looking £600 plus a disclaimer that it will be more if one of the hydroblocks fails during removal or refitting

No sorry I meant fitting a new external vessel on this? Leaving the old one in.

 

[Kayos]

No sorry I meant fitting a new external vessel on this? Leaving the old one in.

2 Hours labour plus vessel and chemicals

 

[Bryan Williams]

If I were to do it myself I'm assuming that the pipe I'm pointing to is the return and that I could tee into this?

 

[dan treg]

hello would say the one next to it with the bleed point and the flexi pipe tp pressurise the system was the return and what your pointing should be the flow however the vaillant dirt collector is normally fitted on the return pipe so i guess return pipe sjould be cooler

 

[gaz1]

swap the elbow for a tee and then reduce down to 15mm

you can get everything ready before you do the tee part

you can go direct to 15mm and fit a tee where the flexi is but finding a nut to fit back onto the flexi valve maybe fun or you maybe lucky and its all on the new style

 

[Seadog]

You may find that there's insufficient room in there.

 

[Bryan Williams]

hello would say the one next to it with the bleed point and the flexi pipe tp pressurise the system was the return and what your pointing should be the flow however the vaillant dirt collector is normally fitted on the return pipe so i guess return pipe sjould be cooler

I just turned the boiler on and waited to see which on got hot on the way back, it was the one I'm pointing to so I assumed it was the return.

 

[Seadog]

It doesn't need to go in the return.