Service expansion vessel

[MOSSEP]

Anyone know how to service one other than check the pressure and top up if required?

A client has had a Legionella inspection carried out and has said that the hot water system should have the vessel serviced, mentioned something about bacteria growing in it. Would taking it out fiushing it with chlorine work?

 

[IDCHAPPY]

Sounds like sh*te to me to be honest..

 

[MOSSEP]

Me too, its been flagged as high risk in their legionella risk assessment though so need stop be done!

 

[Ch4 plumbing]

Is the feed at the bottom or top? Limited knowledge but they deem all "upside down" ones as a risk as they don't naturally flush I think.

 

[snowhead]

Potential Expansion vessel contamination seems to be the flavour of the month, (or year), now.
I've had it a few times on the sites I visit.

Advice from the Water auditors is;

The vessel should be bottom feed as CH-4 said,
Have a Drain off cock in line followed by a gate, service or other valve.
Then regularly isolate the vessel and allow it to self drain through the Doc. recording the event of course.

 

[jonnyswamp]

A valve before the vessel????????

 

[MOSSEP]

would it not be bad practice to have a valve before the vessel? Could be a danger if someone turned it off by mistake.

 

[snowhead]

A valve before the vessel????????

Yes

 

[snowhead]

would it not be bad practice to have a valve before the vessel? Could be a danger if someone turned it off by mistake.

And Yes.

But if you're talking about Legionella inspections / surveys, that's non Domestic systems where the risks and consequences of contamination are greater.
But the risk of interference with the system is lower due to secured plantrooms etc.

 

[Dotty]

It'll be a lockshield type valve so that a tool is required to turn it off. Common practice on commercial EV'S.

 

[plumben]

why not swap it for one that forces flow through it

 

[jonnyswamp]

My bad, Ill get my coat

 

[lame plumber]

My bad, Ill get my coat

byeeeeeeeeeeeee.............

 

[gasmanrob]

What are the odds don't see moss for a while then I spy him in London and a few days later he's in

 

[chris watkins]

Reliance Water Controls - Anti-Legionella Valve - Advanced Water Company

http://www.advancedwater.co.uk/STOMEMO/A520-632-0001/AntiLegionella.pdf

Why not sell them one of these plus a bit of pipe alteration, job done !!

 

[jonnyswamp]

byeeeeeeeeeeeee.............

Jesus, you've only just got back, where you going now !