Ok, in answer to your question (and I'm an installer primarily), from experience you know the size required, However for a long run (I call upto 20m long) I would always take 5 mins to do the calculations.
namsag";p="1862108 said:Re read your own post you half wit its not an existing carcass
you said piped it in 22 from meter as you do.
You are quite right actually, i failed to mention it was an existing gas carcass, but seeing as you persist, with an appliance on, what does checking the working pressure at the meter do? regardless of the gas carcass? you have 5 minutes to look it up.....
: does anyone when fitting a replacement boiler, bother to check/calculate EXISTING pipe sizes or like me, do you find out after you have installed the appliance that the carcass is too small? .
You have been caught out with your lack of experience, or laziness
oh FFS i will humour you so you can use it in future .
You said you where getting 18mb at appliance which was being asked for , well if you where getting 19mb at meter then 18mb at appliance is totally acceptable and meets the regs regardless of pipe size or length of run .
Oh and what 33 kw combi was it
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