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I have never been a plumber in my life i am a time served gasman which is how i know about absolute basic pipe sizing and i have already broken down the figures for loss earlier in the thread what bit of those are you finding hard to read with your very obvious limited intellectual capacity ?

FFS stop putting what you think it is and put what the OP actually put its 2 elbows not formed bends jesushchrist

as i said use the calculators correctly two 15mm elbows and 1 metre of 15mm pipe with the actual figures from a logic plus 30 does not give you those figures are you some sort of halfwit that struggles to put in the basic information ? . please attempt to show me a breakdown of your comment...

and you need to read what the actual op put and stop going on about mitre bends which are not and never have been used on standard domestic copper installations let alone on 15mm but that hasnt sunk in has it . No they dont give the figure you are coming yup with . Try using them properly .

no 4 of us are now ;)

have you tried slightly unscrewing the bolts that hold the head to the body . if they are too tight it can cause this problem on these valves

Shame you dont know how to do them correctly or follow simple charts but hopefully this thread will help you in the future

wtf are you on about mitred bends which you say you have never seen on copper but want to bring them into the calcs . the OP has not said he has pulled bends he has said he has the standard every day elbows that are fitted day in day out every minute of the day on pipe runs . No when i size a...

read what the original poster actually put. Pure and simple your calcs were wrong

what the fek is a mitred elbow no the figures are for standard 90 degree elbows that are bought off the shelf in every shop/merchants that everyone uses I have gave you two charts to work off that do not have any lea way added for safety so stop talking shyte and accept that you are wrong by...

technically after filling the little pipe between the taps should be removed and the blanks put on . yet to see one done yet

yes but its been left in an awkward position so dont worry too much about it many people just use the one

use the proper pipe sizing calculators 1m meter of 15mm copper pipe is 0.49 its self 15MM elbow is classed as 0.4 of a metre so x 2 that is 0.8 of a meter so another 0.3947 So your calcs are well out Then possible allowance for the tee The figures of the logic plus 30 is 3.135m3 /33.733kw...

33 .7 kw gross on 1 metre 15mm with two 15mm elbows is a drop of 0.8881 before allowing for how may exit the tee which could possibly take it well over

edit

but it tends to block in the actual manifolds which larger pipework doesnt have

Cheaper and in theory easier to fit but not really . Microbore used to be 8mm copper but now you get 10mm copper and plastic with 8mm rarely being used

the left hand blue one push it back it maybe pretty stiff and need pliers on it gently .

They will prob cover it over with donkey dick ........that is the term the guys use for the stuff they use if you see them doing it you will understand

From the book . Pipework suitable for gas used in an inappropriate location and/or situation: Situation 1. installation pipework ........... im not putting it as doesnt apply here situation 2 service/service pipework. For situation 2 regarding service/service pipework, see Gas Safe...