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ChrisR your a lot cleverer than me if you can deduce that. :)

you have a lot of words there. unfortunately they are somewhat jumbled up. a picture paints a thousand words. you've got a back boiler, you've had two new/replacement rads/rails fitted. c5 is a fire. all the pipes are lead & copper. you have an old safety valve on the primary's...

move them.

wheelhead= plastic turny knob. hopefully on flow. lockshield= plastic cap. used for balancing.hopefully on return. :)

pedantic i know, but the connections should be made by an rgi from what i recall.

have a look at giblets post. a surge arrester may be in order.

how would he know this ?

Re Parts Center. never been charged to restock, even brought back pcbs no problem. i've even been on stop (rubbish at paying on time) & still get parts. i've ordered one part & five have arrived in the one bag. apparently it was my lucky day. it all depends on the guy behind the counter...

stop this now everyone. op go and worry about something else.

it was only ballpark/guess on info provided. 8)

may i draw your attention to 'Central Heating System Specifications (CHeSS) Year 2005' document page 6, item 6. "For gas boilers, the distinction between bands A and B is small, and standard tests do not measure the difference reliably. Consequently, it is not cost effective to purchase...

out of those 3 the 'Greensleaves :) '.

http://www.hav.co.uk/products/shw-detail.asp?pid=12928&cid=995

difficult to say but i think your looking at around about £ 2000.

what says ? are these valves fitted ? or have you acquired them somehow ?

i cant quite tell which one it is. it looks like the one that is fixed in place with an allen key ? if thats the case then the 'RA2910 Sensor' on the following link looks like it will fit. http://www.twenga.co.uk/offer/47498/5300970067479290878.html if is held in place with a set...

powerflush should sort it out. it appears to sort out most things. 8) :lol: :lol:

just to play devils advocate. the prv is a boiler safety device. not involving the gas train, flue etc.but a safety device none the less. i've seen prvs plugged off & gunked up with silicone to stop them leaking (i realise no one is advocating this). if the ev was to loose its charge or...

http://www.google.co.uk/products?q=danfoss+trv+head&ie=UTF-8&oe=utf-8&rls=org.mozilla:en-GB:official&client=firefox-a&um=1&sa=X&oi=product_result_group&resnum=1&ct=title http://www.hav.co.uk/products/shw-list.asp?cid=995 http://www.hav.co.uk/products/shw-detail.asp?pid=12928&cid=995...

i don't recognise the valves so i cant really comment apart from aesthetically i think they look ugly & cheap imo. towel rails don't look good with microbore pipework. my personal choice would be to use 15mm chrome plated pipework (if chrome rail) reduced under the floor.