installing a shower

[RKB]

Been asked to install a shower in mother in laws.
System is a none combi, with cold feed from loft tank (so hot and cold at same pressure).
If I was to recommend a good thermostatic mixer (any recommendations?), could I just not tee off existing hot and cold supplies in bathroom?
Or do I have to get involved with essex flanges?
Thanks.

 

[ArtfulBodger]

Yes you do, but only if you want to do it properly oh and don't forget the new suply from the cold cistern

 

[RKB]

Thanks Artful,
Can you explain the "new supply from the cold cistern"?

 

[kevplumb]

you need to balance the feed pressure so normally shower has its own supply from the head tank feeding the cylinder

 

[RKB]

Hi Kevplumb,
OK, I understand the reasoning.
What is thge best way to connect a supply from the cylinder feed tank? Do you actually tap into the tank (is there a fitting to do that?), or feed off the line out of the tank to the cylinder, i.e. into the existing pipe?
Thanks..

 

[kevplumb]

tap into the tank preff lower than where the cylinder feed comes out

hot runs out first

 

[RKB]

Understand..
Thanks Kev

 

[ChrisR]

If it's from the loft to the floor below, you'll have a piddling shower unless you pump it. Easiest is probably a pumped box-on-the-wall like an Aqualisa Aquastream (£300+) or a Mira (£less) or a NewTeam (£130?)

 

[kevplumb]

have they sorted the newteams out now
they used to be a g*t for springing leaks

 

[RKB]

Thanks for the suggestions.
If I was to go with an "all in one" solution, which was mains driven, would I need to get a sparks in to install it on a dedicated RCD at the CU. Or can they run of a spurred FCU /RCD, so in the airing cupboard on the landing?