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I generally ask the customer (or the builder who is paying me) if they want copper or plastic and explain the upsides and downsides of both (copper is more expensive and more labour intensive but will last for decades if installed correctly, plastic is quicker so even though very similar in price to copper (including the fittings) will work out cheaper, but the rodents love to eat it, the fittings can blow off and generally looks a dogs bollx. Copper everytime for me unless, told different
Looks no different to me than most of the plastic plumbing I see done.
I was just looking ove 3 & 4 again and it does look suspiciously like a 1pipe!!! but who put new 1pipe systems in these days???
need to have a proper look at thet if I were you!!
Sorry but if you have gone to all the trouble of replacing most of the pipe work and rads in the property, why would the plumber on site not suggest / recomend upgrading to two pipe system?
Would a 1 pipe system work?? I don't recall speedfit having a swept Tee in there range, also the restrictions in new TRV's would slow the flow to the rads as well as the small bore of the Lockshield! Also it down't look much like there is a gradual rise or fall on any of the pipe to assist in circulation, (I realise with a pump this is negated to a certain extent!!)
As for bury fittings in screed!! Ask the plumber which build reg allows that!!
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