Expansion vessel position on unvented installation

[Chalked]

Hear we go gents, two birds killed with one stone or should I say fitting. http://www.advancedwater.co.uk/STOMEMO/A520-632-0001/AntiLegionella.pdf

1. it contains a servicing valve & D/O for those low level installs you all seem to hate.

2. no danger of Legionella build up if you have a long dead-leg of pipe to your L/L vessel install, so long as your mains goes through it.

Happy days !!

(well until you see the cost but if you want quality & an easy life later)

what happens if someone turns the service valve off? ( i do know by the way!):blush5:

 

[chris watkins]

what happens if someone turns the service valve off? ( i do know by the way!):blush5:

Same thing as happens when it isn't maintained & looses it's charge!!!! (two tiers of protection are in place in UK).

Did you know, in other parts of the world,, who run these systems, they don't have any means to take up the expansion when the water is heated preferring instead to just rely on safety valve if the pressure goes to high.

 

[Nostrum]

My favorite is what......... I Dee Ten Tee fitted this?

Something about under cooked pasta?

 

[oz-plumber]

[QUOTE

Did you know, in other parts of the world,, who run these systems, they don't have any means to take up the expansion when the water is heated preferring instead to just rely on safety valve if the pressure goes to high.[/QUOTE]

That's what we do in our part of the globe.
Very rare to have expansion vessel on domestic hot water system.

 

[rpm]

Something about under cooked pasta?

Nope but interesting stream of thought there

 

[paulusgg]

My thoughts regarding the position of the expansion vessel is that as long as it's placed between the water control set and the cylinder cold feed then anywhere is acceptable. For maintenance purposes it would obviously be preferable to locate the vessel higher than the cylinder but as stated in the original post many of our cylinder installs are located in very tight locations where putting the ev high is not an option. Not if you wanted to check the pressure.
It seems that the only disadvantage to low level installation is that should the vessel fail the cylinder would need draining.
And to gain clarity on the issue I discussed it with the technical department at Kingspan (we fit mainly Albion or Tribune cylinders) who stated that anywhere between the inlet set and the cylinder was OK and that the MI's schematic showed the preferred position.

 

[Best]

And to gain clarity on the issue I discussed it with the technical department at Kingspan (we fit mainly Albion or Tribune cylinders) who stated that anywhere between the inlet set and the cylinder was OK and that the MI's schematic showed the preferred position.

The photograph I see and the drawings from MIs of the preferred position of vessel is only to simplify it for us, I believe. Guess just to show vessel last thing before cylinder feed in.