commercial cold water supply

[hammers4spanner]

Currently doing a small refurb on a commercial office where the cold water supply is tank fed .Most systems i have worked on have been boosted with the use of pumps via a tank room.Have not looked at the tank set up in the building but would i be right in thinking that on most commercial set ups tanks that feed the cold water services in the building would have a quick turnover of water with plates acroos the top to stop debris etc??Asking as the other trades on site are whinging about not having water fit for drinking etc etc

 

[glenno1]

Is the tank fed from the mains,can you cut in there to supply a tap

 

[hammers4spanner]

Yeah tank is fed from the mains but its right at the other end of building and offices are being used so its a no no , all other outlets seem to be tank fed which i found a bit odd as i would have thought it may have been boosted .

 

[aqualogic7]

treat it as a domestic install the water can then be treated as wholesome ie fit to drink

 

[chris watkins]

So long as the water is contained within what is known as a protected cistern i.e. think of a cistern that has full Bylaw 30 kit (including insulation) & it is turned over roughly once every 24Hours then the water in it will be to category 1 = wholesome / drinking water.
Don't forget hammer, any extensions or alterations to the system will have to be chlorinated on completion they will be expecting a cert.

 

[Dotty]

Assuming the break tank, which should have a lid, has been sized correctly, how long has the building been lying empty?

As Chris says it may need chlorinating.

 

[hammers4spanner]

So long as the water is contained within what is known as a protected cistern i.e. think of a cistern that has full Bylaw 30 kit (including insulation) & it is turned over roughly once every 24Hours then the water in it will be to category 1 = wholesome / drinking water.
Don't forget hammer, any extensions or alterations to the system will have to be chlorinated on completion they will be expecting a cert.

its not been lying empty as its in regular use everyday thats why i was thinking that due to the constant turnover of water it should be o.k to drink . It was morer a case the trades were moaning on site that as they see it tank fed means no potable drink water on site . My only concern is that have not seen the tank and to be honest i am assuming it has aproprate lid etc etc

 

[chris watkins]

Think of a high rise building, to get the water up past the point that the mains can reach it has to enter a cistern before being pumped, water is still drinking quality so long as it is held in a protect cistern, otherwise there would be no drinking water at the top of the high rise buildings. If the cistern is not protected water would be category 3 & should not be drunk. At the risk of repeating myself any work to the hot & cold water systems, unlike domestic systems, will require flushing & chlorinating after work is competed.

 

[SimonJohns]

I would contact a local water testing company to give you a risk assesment and analysis.

 

[acecharly]

can you not simply run a temporary supply from the mains? 1 rolled out length of 15mm speedfit......how much disruption could this really cause....lifes a learning game, make a note of this situation and make sure next time, you agree with the client a temporary mains supply will be required.