use of flexipipes

[tryeragain]

Hi,

Novice DIYer here.

Looking into replacing my cold water storage tank in the loft and have 2 questions.

1) Will it be OK using flexi pipes to connect the new tank to the existing copper pipes?

2) I hear a lot about water pressure. Would a coffin tank give less pressure than a more vertical shaped tank? I'm thinking that as the coffin tank is low and wide, the weight of the water is spread over a wider area. Whereas a more 'upright' tank will have the water weight concentrated over the pipes supplying the bathroom taps.

Or does the shape of a tank make no difference?

Thanks for your help

 

[Agile]

You can use what you like but a professional would worry that a flexy might burst and bring down all the ceilings!

Its the surface level of the water that determines the pressure in te house.

Tony

 

[powell30]

Surface level Tony?

You mean height of cws tank above hot cylinder outlet i think. Unless i misunderstood you

 

[simond]

You would be much better off cutting back the copper a foot or so and using Polyplumb or Speedfit pipe & accessories to make the final connections, if you are not competent with copper.

That's what the bathroom changers do. Things like tank connectors are all available.

If you want to improve the pressure the only way is to raise your new tank so there is a larger height differential to the shower head. Every litre of water stored weighs 1Kg so make sure the tank is properly supported.

The shape of tank you use will make no odds other than for convenience of fitting. Remember to insulate it all afterwards.