Discuss Purging formula in the Plumbing Jobs | The Job-board area at PlumbersForums.net
Is there any particular reason why you need to know the formula? Just curious
just because I thought u needed to know it to become a gas engineer. thanks
If you can't confirm the pipe size under ground you assume worst case scenario and use the biggest size you have, ie 28mm drops under floor and appears out the other side 6m away in 22mm you need to calculate at 6m of 28mm as you don't know where it drops down, then calculate from 22mm where it rises out the floor
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