Indirect cold water supply to direct cold water supply at mains pressure?

b4ss · 28-09-2021 04:50PM #1

Hi,

Is it acceptable in Ireland to remove the tank in the attic and directly connect cold water supply at mains pressure like they do in other countries?

Here is a diagram:www.diydoctor.org.uk/projects/direct-indirect-cold-water-systems.htm

I understand that during a water maintenance works, there would be no water in the house.

Thanks ,

T

dathi · 29-09-2021 01:48PM

taken from the building regulations part G Tgds.

1.3 The cold water supply to the kitchen sink should be taken directly from the service pipe supplying water to the dwelling; the cold water supply to the bath or shower and the washbasin and to other appliances in the dwelling should be from a cold water storage cistern. The bath, shower, washbasin, and sink should also have a piped supply of hot water, which may be from a central source or from a unit water heater

29-09-2021 01:53PM

It goes against the building regs, Irish water regs & local bylaws. The correct way to improve the pressure is to install a pump for hot & cold that originates in cold water tank in attic

dathi · 30-09-2021 08:45AM

https://www.boards.ie/discussion/comment/117954094#Comment_117954094

under the building regs the water storage tank does not need to be in the attic was only placed there to take advantage of water head height if you are adding a pump you can move the storage tank to any where in the property

30-09-2021 09:19AM

https://www.boards.ie/discussion/comment/117957669#Comment_117957669

You are 100% correct. I was over simplifying things. Many apartments have the combo hot & cold water tank

b4ss · 05-10-2021 05:22PM

Thanks for the replies on building regs, I was wondering if there were any.

I actually have a Walrus TQ-400 already installed, its only ok!

The showers are fine by Irish standards, but not by European standards where the pressure is much better.

Any better suggestions for an alternative pump? anything more than 1.8bar pumps seem to require more than 1inch pipe work which would be a nightmare in domestic.

Thanks again,

Tony

06-10-2021 11:55AM

I'm guessing that the pump is pumping water into the cold water tank rather than out of it?

b4ss · 07-10-2021 11:30AM

https://www.boards.ie/discussion/comment/117982930#Comment_117982930

yea pumping cold water to tank in attic, and also to hot cylinder..

I suppose I could just remove the tank and connect the feed into attic tank to output of attic tank and that would be a neat solution?

07-10-2021 12:26PM

If you need this pump to increase the pressure of the mains just to fill the tank then, Regs or not, it's very unlikely you would have enough mains pressure to survive without a cold water tank.

I am confused when you say the pump is supplying the cold water tank & hot water cylinder. Would I be correct in saying that the pump is on the mains supply & only feeds the cold water tank in the attic. The hot water feed to the cylinder then comes from the cold water tank?

b4ss · 07-10-2021 04:05PM

https://www.boards.ie/discussion/comment/117987788#Comment_117987788

Thanks for the reply about mains pressure Sleeper12..

yes you are correct I was wrong about feeding tank and hot water cylinder on closer inspection hehe :)

T

07-10-2021 09:03PM

Ok. The pump doesn't effect the water pressure in the home. The shower, bath, taps etc. All it is doing is getting is filling the tank. To boost pressure in showers etc you'd need another, 2nd, pump. This would pump hot & cold water to the shower or wherever you want better pressure.

Indirect cold water supply to direct cold water supply at mains pressure?

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