Pressure Reducing Valve Replacement (PRV) 

Thanks. Might have more next week.

Hi Mr.Tom Just I have question on page number 99 on your book . Iam trying to calculate the DFU on point C Lv=1 EFD =o Wc =3 So the total is 28 . am I correct or not . Please advise me

The answer is A. 36. The answers to that section can be found in the back of the book under "Isometric Analysis".

Can you explain me how you got 36

Sure. Each toilet is worth 4 DFU and there are 8 toilets so that makes us 32 DFU. Then we add the lavatories which are worth 1 DFU each. There are four lavatories so that makes a combined total of 36 DFU. The emergency floor drains are not counted because they are 0 DFU. Hope that helps.

That makes it hard to identify. You might look for something similar at a plumbing supplier or online.

@@plumber-tom9470 Ok, thanks, I will see what I can find.