vessel

Hi, Should an expansion vessel pressure match the pressurisation unit? For example, if the pressurisation unit is set at 1.2 bar should the expansion vessel be set at 1.2? Many thanks

Have an Ariston unvented hot water tank in airing cupboard with the red and white expansion vessels and a filler tap. As advised years ago on these forums when I hear that sound that the central heating water needs topping up I usually wait until cold so the gauge goes to zero and top up to 1...

Hello all, I'm currently in Ireland and in a small cottage where the plumbing system has me scratching my head a bit. When the place was done up the builders decided that the tank in the loft was no longer needed and put a tank out back in a small extension where ALL (well, except for the cold...

Hi Guys, Had a quick question regarding expansion vessel on a Vaillant Ecotec Plus 832. Was servicing the boiler and upon attaching hand pump to vessle after having drained the boiler, returns and flows isolated and drain off on boiler open, the vessle showed 1 bar charge. Was wondering why...

Hi All our boiler has just had a new expansion vessel fitted bit the pressure is still rising to 2.9 bars . Is this normal ? Many thanks

Hi, Currently have a Potterton Promax Combi 28 HE A boiler and looking to replace expansion vessel due to issues with it. Looking to make sure i get the right part for it Found this part online but it says it will Fit a Promax Combi 28 HE Plus A,Is the HE plus A and my boiler HE A the same...

Hi, After a bit of a saga with my plumber, I need to chose boiler size as soon as possible, the plumber is not going to do any heat loss calculations or do anything to work out accurately so I am on my own. Appreciate this is not what should be doing but after some level of finger in the air...

Currently installing air to water and underfloor.theres this expansion like vessel with two 3/4 iron male threads on top and bottom of it with no bladder on between.its goes before the primary flow hits the cylinder and underfloor manifold.anyone know of its function??we don't do alot of air to...

Hi, I've got a Ideal Logic 30 - I was cleaning out the trap as it sometimes gets clogged up and tried the pressure on the expansion vessel and only water came out (boiler was switched off but not drained) is this normal or do I need to call out a plumber to change the Expansion Vessel? edit...

I have a 35litre central heating expansion vessel that has come with a pre charge of 1.5 bar. Does this sound a little heigh? As the pressure in the system will have to rise above 1.5bar for it or absorb any expansion? Thanks

Im having problems with a pressurised hot water system. Keep getting leaks every 4-8 months as the pressure valve fails. The first valve failed after approx. 4 years from installation. Since then (another 4 years) Ive replaced the vessel 3 times, its had had vales cores 5 times, and Ive put...

Hi, When my boiler (regular vented I believe) is on there's a constant trickle of water flowing out a pipe to outside (coming off the red vessel in the image below). It's happened in the past and IIRC the expansion vessel needs recharging. I'm pretty sure it's the case again as when I take the...

Evening all, So I've been losing pressure from my boiler on a daily basis and having to top it up. The pressure gauge is up at around 3.5 bar when the boiler is on so I assumed the expansion vessel has either failed or is low on pressure. I had a look on both the Cimms website (the EV is a Cimm...

Hi, i'm a complete newcomer to plumbing so be gentle, basically i'd like to change the kitchen taps (just a simple monobloc mixer tap) and have looked on YouTube and think I have everything ready. I've had a look at the system and it seems to be setup to include an expansion vessel (image...

Hi All, I am looking to replace an Ideal Classic FF350 in a 4 bed detached house, 1 main bathroom with a bath and electric shower, also en-suite with a thermostatic shower that is currently pumped (knackered) from a DHW cylinder (essex flange weeping). F&E and CWS tanks in the loft, gravity fed...

I’ve tried unscrewing this thinking I can use ptfe tape and re-screw it, but it’s not budging. I don’t want to force it if I’m wrong and it doesn’t have a thread. Does anyone know please?

The tundish near the expansion vessel started dripping, plumber came and pumped up expansion vessel and dripping stopped, great. However now, every time we flush any of the loos we get a strange heavy vibration noise through the expansion vessel for 1-2 seconds. We also recently discovered it’s...

Has anyone installed a Refix potable expansion tank? There's a plastic insert inside the 3/4 threaded connector - should it be left in? I though it maybe to space the diaphragm off the inlet point, but not sure if it's just a protector insert which will stop the tank operating - nothing in...

I have removed an old expansion vessel from a Worcester greensatr 24 i. I am now trying to reconnect the hose but I am having great difficulty. Its so tight inside the fitting. Is there an easy way to reconnect it? Thanks

Afternoon, I am not a G3 engineer but am using the downtime during COVID to do some extra learning. Is there a calculation to use to correctly size the expansion vessel and have the correct pressure in the vessel on unvented HW systems? Thanks