Hi all

I have a particular problem with hot water in my house. The details
are as follows:

1. Gravity fed system with cold water tank in loft with boiler and HW
storage tank on 1st floor
2. Hot water supply on ground floor and 1st floor completely adequate.
3. Hot water supply in ensuite on 2nd floor sucks and completely stops
when hot water being used on 1st or ground floors.

My own investigations have revealed that:

1. The hot water supply to the second floor is via 15mm pipe whereas
it is via 22mm pipe to the 1st and ground floors
2. The cold water supply to the 2nd and ground floors is directly from
the mains and the supply to the 1st floor is from loft tank.

In order to sort this out I have done a little research in this group
and elsewhere. It seems that my best/cheapest/least disruptive options
a

1. Supply the 2nd floor HW via 22mm pipe. I don't really like the
disruptiveness of this and am not convinced it would make much
difference.

2. Install an impeller pump in the 2nd floor ensuite.


I particularly like option 2 but have the following queries which I
hope someone here can help with. These a

1. It looks like these are primarily designed for showers. Presumably,
though, there is no reason why I couldn't fit one to feed the whole
of the ensuite, ie, both the bath and the basin. If this is a problem
I could consider just pumping the bath HW tap.

2. I have searched for a supplier and the cheapest I can find is the
1.5 bar SF Turbo 2 pump from Argos (catalogue 830/7554) at £99.99.
However, this is a twin pump and I only need a single one. Can I use a
twin pump to pump only one pipe?

I can also get a 10% discount from Argos - hence the particular
interest in this item.

3. Also would 1.5 bar be adequate for a decent enough pressure or
should I try to get a meatier one from elsewhere?

All helpful suggestions gratefully received.