softus...did the shower perform well ?
Yes.
i imagine i'll have to to bury the pipework...or can the mixer work by "bluetooth" ?
There is an 'exposed' edition of the boost. Not quite bluetooth, but no chasing either.
as usual customer doesnt want the pipes showing...and i dont blame them.
Oh. Cancel previous comment then. Chasing/burying it is.
softus...as you know there are various ways round a mains cold gravity hot....which is simplest and cheapest in you opinion ?
Simplest is not the same as cheapest. My preference would always be balanced supplies, whether gravity, pumped or mains, so that you're not relying on balancing valves, or venturi valves, or check valves to keep on working.
Cheapest depends on whether or not you can run a new cold supply from a storage cistern, and whether or not you have a cheap plastic-bodied low-flow shower pump for occasional use, or a full-blown brass-bodied stonker that can pump all day without needing to be cooled down.
i have had endless folk asking me for showers over the bath with said circs and they dont like the proces i quote.
I'm sorry, but I didn't understand very much of that sentence - what are "circs" and what is "proces"?
.....as you know shower mixer, pump, new or additional cwst, labour all adds up.
Well, I recommend keeping it simple, and buying a valve that you know you can get spares for.
in the past i have fitted presure equalising valves...to shower only pipework and told them it wont be a power shower...and indeed it isn't.
I can but suggest that you don't tell people that a non power shower is a power shower.
i have also thought of putting a single pump on the hot only and then onto the PEV.
I've seen that work, both with and without the PEV.
i think a simple bath tap with venturi workings inside for a shower would sell like hot cakes
Possibly, but you don't need the mixing function of the venturi shower valve when drawing a bath, so in a sense it's a strange idea for a product.