"Tommy Gilchrist" wrote in
message ...
Folks

I've recently moved house and inherited a bit of a mess of dodgy DIY
stuff (and it's bad when I, the master of dodgy DIY, consider it
dodgy).

Having just plumbed and fitted an upstairs bathroom, with many thanks
for some good advice from the group, I've discovered the shower in the
downstairs bathroom is fed from the water tank.

I've always understood that an electric shower had to be fed from the
mains supply. The question is, is this just an annoyance to be sorted
when time permits or is it a danger which should be sorted as soon as
possible?


In my previous house, there was a pumped electric shower already there when
we moved in which was connected to the mains. The pressure was good but it
meant that if anyone so much as looked at the cold tap in the kitchen or the
washing mashine or the garden tap or even mentioned teh word tap, the
pressure went berserk, when the shower was on. You could stand in teh
kitchen and turn the cold tap on for a moment and 5 seconds later get a
scream from the shower room as the occupier got scalded and frozen in quick
succession.

We then got a new shower put in with a new pump and it was done directly
from the attic storage tank by a local plumber who usually knew exactly what
he was doing. He recommended that route. I know this is a DIY group but
plumbing in showers is a bit scary (I DID do the tiling) for me.
Anyway. the pressure was about the same because, I think the limiting factor
is how fast you can heat the water, not how much water you can push through.

In my current house, the shower is from the attic tank also. These 3
showers were all pumped electric (i.e. pump plus heating).

Des


The flow rate is poor, understandably, but just about acceptable which
is probably due to the shower being on the ground floor and the tank
being in the attic above the first floor i.e. about a floor and a half
above.

Second question - should an electric shower be plumbed with 15mm or
22mm pipe?

thanks

tommy