Expansion Vessel Size.

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burnie35

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Having took out boiler insurance and having a leak and a temporary fix by recharging the expasion vessel (needed a new one as it wasn't going over 1-1.5 bar) and being charged as wasn't covered (different ongoing story), it has started leaking again. Vaguely know a local plumber and he said if i order it he would fit it when he's back from holiday.
Only problem is the size of the expansion vessel, the previous plumber took the sticker with all the details on it with him and the height doesn't match with any other sizes that i've checked.
The tank is 180l Range Tribune HE and according to the paperwork it is an 18l EV and sizes are approx 395 x260mm that i measured but these aren't near sizes online.
Any help please.
 
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An 18 litre vessel is about right, plenty on the internet but do make sure you get one for potable water (usually white or blue in colour) and NOT a heating vessel (usually red)
 
Assuming you have an original range expansion vessel,do a search fro 'Range TS219' this should fit the existing wall bracket,etc.

Hope your plumber is qualified on unvented :idea:
 
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Cheers for help, all sorted.
Few more questions. I like to know how things work and try to understand (in basic terms) but He done it while I was at work, so couldn't ask him.

1. Why is there a pressure gauge on the red EV but not the white one.
2. He left the old EV (as per my request as I want to take it apart (don't ask)) and there was no pressure in the bladder even when i tried pumping air into it, what would/could have happened if it was left with no air in bladder.
3. From what I gather from what the wife seen him do, it was turn off water supply, turn on hot tap, drain water from EV into a bucket and refit the new one which seems simple enough (no disrespect to anyone). I know there is probably more to it than that but from what the wife saw that seemed to be it (again no disrespect)
 
The red expansion vessel is for the water in your radiators and boiler so you need a gauge to tell you what is there , your boiler will have a cut off if that pressure is too low .
if the white expansion vessel was left with no air then you would constantly have water from your cylinder passing through the pressure releif valve.

And your last point , trust me Unvented cylinders are a lot more of a risk than any gas appliance if messed around with, do not attempt anything on these unless qualified .

 
ianmcd said:
The red expansion vessel is for the water in your radiators and boiler so you need a gauge to tell you what is there , your boiler will have a cut off if that pressure is too low .
if the white expansion vessel was left with no air then you would constantly have water from your cylinder passing through the pressure releif valve.

And your last point , trust me Unvented cylinders are a lot more of a risk than any gas appliance if messed around with, do not attempt anything on these unless qualified .

Click to expand...

Cheers for info, as for DIYing it, I may be daft but not stupid (although the wife may disagree).
 
Just out of curiosity: if it's got a safety valve, how is it going to explode? What extra does a qualified un-vented plumber have to learn that a non-qualified one wouldn't know?
 
DursleyDonkey said:
Just out of curiosity: if it's got a safety valve, how is it going to explode?
Click to expand...

its not unknown for a diy repair operative to cap off a remote pipe dripping water from an unknown source or a diy operative to purchase an untested/calibrated.used safety valve and fit it.
Consider the temperature relief valve and the separate pressure relief valve to be unservicable ie not able to operate at their set schedules. Now add an overheating heat source (n).
see the above video :(

DursleyDonkey said:
What extra does a qualified un-vented plumber have to learn that a non-qualified one wouldn't know?
Click to expand...

If there is a need in your location,then consider the g3 course (its a 1 day event,should be less than £290) and if there are many unvented cylinders in your local area or new builds with unvented. consider asking the cylinder manufacture to be a local repair (warranty) agent.

£290 could be a good investment.

DursleyDonkey can you repair powermax (non condensing boilers) :?:
 
DursleyDonkey said:
Just out of curiosity: if it's got a safety valve, how is it going to explode? What extra does a qualified un-vented plumber have to learn that a non-qualified one wouldn't know?
Click to expand...
because it needs a lot more than one safety valve, you havent a clue so please do not advise anyone on here
 
So how do you know if the safety valve goes, do you get a warning (noise, water leak) and is it safety valve goes then cylander blows or do you have enough time to get a G3 plumber in to sort it.
 
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