On 21/03/2011 20:33, harry wrote:

the upstairs hot water feed is plumbed in 22mm the hot supply to
the bath and sink is woefully slow flowing, this is not helped by
the use of modern (no washer) taps which seem to slow the flow even
more.

This is an increasing problem, bearing in mind that the majority of the taps
now for sale in the UK are made in countries that do not have antiquated
gravity-fed water systems and hence are designed to operate with a minumum
mains pressure.

The hot water flow from our modern kitchen tap was pitiful (even though the
header tank was two floors up in the loft). When we switched to a combi
system the flow improved dramatically and is now fine.

--
Triff

Combi boilers are just for cheapness. They have no other advantage.
Our traditional system if properly designed is far superior.

It's perfectly possible to have a mains pressure HW system without a combi.

A Mains pressure cylinder will provide the benefits of mains pressure
HW, along with the hot flow rate advantages of stored HW.

It's what most of the rest of the world does!

I'd be hard pushed to consider anything else now, having switched to a
Megaflo system. ( Other than perhaps a small flat with no bath and no
space for a cylinder where a combi would be the better choice. )

--
Ron