bathroom refit - hot gravity fed, cold mains fed

[Pottman]

Hi there....

I'm in the process of refitting my bathroom and have the situation where the cold feeds to the sink/bath and toilet are all from the mains feed.

The hot water is gravity feed (water tank in loft and hotwater cylinder in the bathroom)

Putting in a shower I presume I am going to have problems of balancing between the mains cold and gravity hot.. and have the problem of tap turned on elsewhere (kitchen, garden) that I'll get scolded!

Can I get away with putting an isolator in the cold feed to the shower and using the isolator part closed to regulate the flow.

I presume ideally that gravity fed cold is actually the better way to go?
If I wanted to run both hot and cold as gravity fed can I tee from the cold inlet from the hotwater tank... or is it better to run a second line directly from the cold water storage tank?

Thanks for your comments.

 

[liverpoolboy]

you could either have an electric shower (mains cold feed only) or take a separate cold feed from your cold water tank for your gravity feed cold and a surrey flnage from the top of your hot water cylinder for your gravity hot - that way you will get an equal balance of pressure.

how big is your cold water tank? it should be large enough for this...

or you could actually fit a venturi shower valve - mains pressure hot and cold water this way (or nearly as good as)..

 

[seco services]

don't fit a isolation valve to restrict the water as this only restricts the flow not pressure.
as stated run shower feeds seperate to any other supply then you won't get any problems.

 

[liverpoolboy]

you want equal pressure on your hot and cold for your manual mixer shower, but if you ever have cold mains and gravity hot then you must have a double check valve on the 2 supplies, eg with a kitchen mixer tap.

 

[Rico99]

Hi there,

You could judt get a "venturi" shower mixer. This uses the pressure of the main to pull the hot thru the mixer faster.

Rico

 

[liverpoolboy]

only possible to have a venturi shower mixer if the rising main passes through your airing cupboard though isn't it ....?

 

[Rico99]

LB,

Why do you say that.

If it going above the bath, just take the feeds from the supplys already in place.

Rico

 

[liverpoolboy]

sorry i forgot that all the taps were fed from the mains. you can just tee off then.