Expansion Vessel Upside Down?

[Best]

Hi Guys,

I have a caleffi PRV in my hands, to replace the current one, as when heating the system the gauge doesn't move.
- it does appear to move correctly, when pressurising via cold feed.

Before I went to replace the PRV, I had a quick look at instructions...

In bold text it states do not install upside down...

Well the current one is upside down, I slapped my forehead and growled!

So the question is, what are the consequences of installing the PRV upside down? Am I going to need to repipe this?

I'm surprised as no one said the original was upside down, so perhaps the instructions are not great?

Please left me know as I'm sat here with the heating off and drained down wondering what to do?


Thanks.

Richard

What exactly are you attempting to replace?
A pressure relief valve, - or a pressure reducing valve? (Both are PRV abbreviations)

 

[hallra]

As per the picture on the original post, the pressure relief valve that is below the expansion vessel.

 

[Best]

As per the picture on the original post, the pressure relief valve that is below the expansion vessel.

It should be fine in any orientation, the Prv.
Only critical thing about the relief valve is the outlet and inlet must be correct.
(The valve wouldn’t open to release pressure if the inlet was actually joined to outlet, for example)
The gauge could be faulty.
The relief valve normally is fine if it doesn’t pass water below it’s 3bar setting

 

[Best]

The heating wouldn’t need drained down to replace that valve.

 

[hallra]

The heating wouldn’t need drained down to replace that valve.

Thanks for the info, I parked it for the night.

I had the system drained down for other items I had been working on.

The valve could be change without drain down if I wasn’t replacing the guage...
- I’m replacing the PRV as well on the advice of Caleffi.

I did contemplate just changing the gauge at one point, however it wouldn’t budge one bit and I wasn’t going to risk snapping it that late in the evening.

So eventhing is back up and running for now, without replacing the PRV and guage.

 

[hallra]

Update:

installed so far:

Magnaclean
Air Separator
Replaced pump valve and seals.

I also found two leaks:

The compression fitting on the positive side of pump.

The Automatic Air Vent i’ve recently replaced.

There is also a possibility that the fitting on the negative side of pump was leaking as well.


Hopefully the air, noise issues have been dealt with, time will tell.

 

[noelm]

Could you have a leak somewhere ?
If the system is pulling in water you will keep getting air. I'd also check pump connections which can also pull in air on each start up.

 

[hallra]

Could you have a leak somewhere ?
If the system is pulling in water you will keep getting air. I'd also check pump connections which can also pull in air on each start up.

Thanks for the suggestions, as per previous discussions under this post and other discussions under several other posts, a lot of things have been looked into, including hidden leaks.

Fingers crossed, the work I did last night, has addresses the problem, only time will tell.
- I did found two small leaks one either side of the pump and found that the automatic air vent I had recently replaced was leaking water.

Plus the Air Seporator has done its job and removed a lot of air...


So far, I have only heard the rads once... I have also noticed that the boiler has stopped short cycling and the house is heating better...
- More heat is reaching the Rads

 

[Gasinspect]

I would try shutting off the automatic air vent, have been known let air in. If you are bleeding radiators that octen it is not doing its job anyway.

 

[hallra]

I would try shutting off the automatic air vent, have been known let air in. If you are bleeding radiators that octen it is not doing its job anyway.

Yep, did that after discovering the leak in the new AAV