Nickfromwales

I think there is a big jump between thermostatic and fully modulating. The former still is quite crude, with the latter near flawless in its delivery characteristics.

Probably as good a place as any to impress upon folk the need to strip and clean these filters / strainers directly after commissioning, and again after about a month or two of normal service ( use ). Any crap in the incoming supply (new MDPE etc.), or solder, flux, PTFE tape and jointing compounds can get to / and sit on the valve seat and cause it to malfunction. The effect of that failure is for mains pressure to get past the non-sealed seat and damage upstream equipment.

1) Reliance 2) Caleffi 3) Ariston

In @TerryE's instance, the stainless steel gauze filter in the PRedV should be all the filtration required TBH. If, post PRedV, the fill point is drawn for the heating / HP etc then that primary measure should suffice.

Diaphragm, filter, spring and adjustment screw for the pressure setting.

Do you have sufficient volume and head to not require a secondary pump for the rainwater? Do you have filtration on the primary and secondary sides?

It's one I did 1st bank cold 2nd bank hot @ 51oC 3rd bank hot @ 46oC ( basins) 4th 2-port out of view was 2 x hard water. One to kitchen sink & O/S tap ( back to back ) and the other to utility cold and boiler fill loop ( back to back ). 2 x TMV's for each temp zone Black thing is a 2 Ltr hot water expansion vessel. Blue cylinder is a 500 Ltr Telford TS with a 46kw 28mm DHW heat exchanger ( coil ). ?

With no dependants / infirm in the house there really wouldn't be any need for the second drop down, other than for comfort / convenience. I prefer the latter, so I have one in my house. The joy of just flicking the tap on at the full hot position and having comfortably hot ( user definable of course as TMV's are fully adjustable with a simple turn of an Allen-key ) is what I like. No flicking the tap between hot and cold to get the right temp, then the pipe work temp stabilises and you have to readjust it, then someone flushes a loo elsewhere and you have to adjust it again........why do this to yourself for change of £40? @TerryE, your old farmhouse would have had a large bore ( 22mm or bigger ) DHW pipe work setup with full bore taps and no restrictive valves such as a TMV. The flow rate therefore would have been good or very good. When you introduce 15mm pipe work though a PHE, then take it through a TMV, you have to start adding the various resistances together and summise from there. As that TMV is 1" body by default, then I'd use a piece of 28mm pipe coming out, going into a 22x22x28mm compression tee, ( Demountable for servicing ). Then 22mm to each manifold.

Evening squire As you've got 2x 15mm outlets on the SPV's which are combined to give flow from both units simultaneously ( in parallel ) then there is merit to go to the 28mm TMV for reduced flow restriction and increased litres per min at the set temp. The questions are :- Do you ever see that many hot water outlets being used simultaneously to warrant such a decision? Will the incoming cold mains be man enough to allow this max velocity to be a realistic consideration? The flow through a 22mm TMV is really quite high tbh, and to give one example I previously fitted a 450ltr TS for a customer which had 22mm TMV set to 51oC. I ran both the showers simultaneously and the kitchen sink and they all ran more than adequately. There was a 300ltr cold mains accumulator to reinforce the cold main so it could maintain these rates, but the hot side certainly didn't seem to struggle at all. It may have if a bath was in the picture but running the bath whilst 2 showers are being drawn is a bit extreme. Anyhoo, a fortune? Check this TMV out. And, drum roll please........... Wales delivers once again

Agreed. Bold colours on anything other than ( interchangeable ) doors isn't a good idea IMO. I've talked some people out of crazy tiles, and after choosing again they've thanked me. Some people have told me to FO, and stuck with their first choice. One the other day walked in, looked at the tiles, squinted and said "oooo, they look a lot different when they're up, what do you think?". I smile and say they look lovely. That, plus the fact the adhesive has gone off and it's too late to pull them off and bin them

Words are like weapons.....they wound sometimes. But not this time Stare at that damn penny floor until you love it.

Oh, and thanks for keeping my bizarre flooring thread on point

I couldn't understand why someone would want a donkey jacket, then I saw your ( soon to be uploaded ) avatar picture......

So are my going out clothes. ?

My missus just showed me the LED splashback video. The coffee tables look the dogs bollocks. . Sorry, light cubes or whatever http://allthingsled.ca/2016/12/16/dec-16-16-demo/

Check this out for a flooring that'll save you a few pennies, or not

Photographs taken with the daily paper in the shot are bombproof .

This should offer some light relief.

Set it up for now with the bath being the only thing that uses tank fed cold if possible. ? If that's ok I'll continue to add to this accordingly. ?

Was it frozen?

That's why we're here .

So, where were we?

FYI. I shall remove the edit tags tomorrow so the thread is clear of any such history.

A polite notice from @BuildHub It was decided that this thread would be locked for a cooling off period as things got a little personal. I have, as a site moderator, edited the content according to site etiquette and forum rules. Anyone who has commented in this very helpful and informative debate can now please check their OWN posts for my editing. You will each find I have marked and identified the edited posts so if there is no marker, it has not been touched. UNDER NO CIRCUMSTANCES IS ANY MEMBER TO DISPUTE THESE EDITS ON THE OPEN FORUM. Any genuine discrepancies can be corrected immediately. Please contact me directly PRIOR to making any amendments and I will accommodate / facilitate the requests accordingly. This is to ensure any edit / amendment doesn't make the thread non-sensical. Let's keep a good forum great ? "Have a nice day y'all"? @BuildHub