Pressure vessel

[chris66]

I need to fit a pressure vessel to my heating system and have a couple of questions (prob more)

Is it ok for the discharge pipe from the safety relief valve to exit about a foot up then run down the wall and finish an inch or so from the ground ? or does it have to be up high.

I plan to fit the vessel in the return, but the 22mm pipe is very tight to the wall and will be difficult to cut and get a fitting on. Would fitting it about 6 ins after the pipe reduces to 15mm be ok as it would have a rad pipe between vessel and boiler.

Appreciate any help

 

[45yearsagasman]

For what reason are you having to fit an EV? Are you sealing your system?

 

[chris66]

For what reason are you having to fit an EV? Are you sealing your system?

I've only got rads downstairs at the moment and want to add some upstairs.

I have no room to raise the header tank, which means it will be lower than the top rad.

 

[matt1e]

For what reason are you having to fit an EV? Are you sealing your system?

I've only got rads downstairs at the moment and want to add some upstairs.

I have no room to raise the header tank, which means it will be lower than the top rad.

so is that a yes to 45yearsgasman's question then chris?

 

[swbjackson]

Make sure your boiler is suitable for use on a sealed system first.

 

[chris66]

so is that a yes to 45yearsgasman's question then chris?[/quote]

Lol, it's a yes unless there's an easier way of sorting the problem.


I've checked the manual for the boiler and it's okay for a sealed system.

 

[chris66]

Well I've decided to fit it in the 22mm return.

There's not going to be much movement in the pipe when cut, so I plan on using a end feed slip T.

Is there such thing as a compression slip T, just in case I can't get the pipe dry.

 

[Agile]

I have never seen any advertised.

Most would use a slip coupler to achieve the end float needed.

I make them up from normal couplers as they are expensive.

Tony

 

[chris66]

Cheers Tony

How do you make them up ?

 

[Andygasman2010]

Is it ok for the discharge pipe from the safety relief valve to exit about a foot up then run down the wall and finish an inch or so from the ground ? or does it have to be up high

The discharge outlet can be high level if you want, so long as it's turned back to the wall and not over a window or door etc... Bringing it to the ground is fine too but a waste of copper if you ask me. Plus, it might get nicked!

Also, the PRV should be on the boiler flow pipe as close to the boiler as possible.

I plan to fit the vessel in the return, but the 22mm pipe is very tight to the wall and will be difficult to cut and get a fitting on. Would fitting it about 6 ins after the pipe reduces to 15mm be ok as it would have a rad pipe between vessel and boiler

The expansion vessel should ideally be on the pump inlet to keep positive pressure around the system.