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Thanks, some studying of how the two systems heat a room sounds in order. If the UFH has made the room too warm it'll take ages to cool down (because the UFH is heating floor mass rather than air). Will not the UFH manifolds mixing valve, and individual room thermostats (in the rooms with UFH)...

I think removing the 2 port valve and connecting the UFH to the main central heating flow and returns would provide the above. Also removing the 2 port valve requires just a 2 channel controller - which the V Smart stat can provide.

There is a vaillant system boiler with unvented hot water cylinder, with a number of radiators fed from this. My G3 Gas Safe installer is currently installing this. In two rooms on the ground floor there are two loops (one loop per room) for UFH. The UFH is on its own circuit from the boiler...

So with option 1) you could have this under the bath: Reliance Valves HEAT110750 Ausimix 2-in-1 Thermostatic Mixing Valve 15mm TMV2 and TMV3 approved. With this tap set, its a mixer, but all the cold will do is cool down the already tempered supply:

Thanks for clearing up the confusion, I should have referred back to the regs for guidance on what is required. Some of the confusion arises as I want a shower mixer with a bath filler tap. If I understand correctly - the Regs, G3(4), for particular types of dwelling, only apply to baths, not...

Its one of these 'economy' products: https://www.screwfix.com/p/rize-exposed-thermostatic-mixer-shower-valve-fixed-chrome/491fv#product_additional_details_container EAN: 3663602665922 Just spoke to SF, they have gone off to speak to Tech, so waiting a call back. Of all the TMV's shower mixers...

Have applied a little Silicone Grease from our vans grease gun, closes a treat - not sure how long it will stay coated/in contact to lubricate. Thought I was going to have to apply the same grease to a very sticky sliding shower door, but discovered some donkey onsite had installed the door...

A boiled kettle of water allowed it to close, but its been left for a few hours and although it closes - its really stiff. Will try some Silicone grease ! I doubt if you can replace the rubber seal and may have to replace the whole thing. I reckon some measuring calipers and Ebay might locate...

Recently started fitting these instead of 'click clack' type of pop up wastes. Worked a treat out the box, but after a few months use - the rubber has swollen to the point where the plug will not flip round to seal. Is there a way to shrink the rubber back ? I am sure nothing apart from...

Yes I have seen the TMV'3' noted for NHS installations. For my sins, and one I am sure I will regret, I have what I think is a Domestic TMV2 purchased from that purveyor of some of the cheaper quality brands - the Kingfisher Group - all fur coat etc, but no where in the substandard literature...

Ahh, thanks for finding ... it isn't very clear on what it refers to. Whilst on TMV's, are the cheaper models (ie £50) more prone to problems ??

Just spoke to Kingspan Technical - who's Cylinder we have purchased. It was advised not to run it to the plastic gully, but run it to ground ... 100mm above, guarded (to avoid small fingers getting near the outlet). As there is block paving along the side of the property it will be terminated...

Triffic, just what I hoped would happen. Thanks.

Very helpful thanks. (b) formed by a material change of use within the meaning of regulation 5(a) or (b) What is regulation 5(a) or (b) ?? - am I being a bit thick here, but what regulation is it refering to, part G refers to this in several places, yet itself contains no 5(a) or 5(b). Am I...

Here we go, presume the 'leg' in the middle can simply be spliced off at the end and the extra port valve coupled to it ... the 22mm copper on this leg is closed at the end in a manner I have never seen before ....

I understand Thermostatic Mixing Valves (TMV's) are required in baths and showers in public places, schools, hospitals etc. Does this apply in Rental properties and HMO's ? Its obviously good practice, but is there a requirement, and should it not also apply to any hot water taps in bathrooms...

This document gives prescriptive information: Approved Document G Frequently Asked Questions https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/509352/160321_Part_G_FAQ.pdf Paragraph 3.60 of the Approved Document says that if a discharge pipe is...

Where does Solvent weld pipe - under BS 1455 sit in all this, the description again states (as it does for BS1453 and BS1451): 'Plastic piping systems for soil and waste DISCHARGE (low and high temperature)' I note there are solvent weld versions of Soil pipes ... not that I have used those. I...

Won’t the gully be full of cold water? Yes at the level of the trap, you could put the level of the pipe down into the cold water, but would there not be risk of siphoning? higher then it would discharge onto the plastic edges of the gully. I believe it needs to conform to BS EN 1451-1...

Its advised not to discharge from P&T valve into plastic pipework. I was hoping a nearby horizontal uPVC soil pipe running under floor boards could be used, but am unsure with this guidance. I note the recommendation is to go to an external gully below a fixed grating, I've done the resistance...