1. COPPER PIPE SIZING PROGRAM Free Version

2. FREE CALCULATOR WILL WORK ON PHONE OR PC ENTER START PRESSURE say 40m=392.4 kPa 392.4 ENTER NUMBER OF DWELLINGS 10 LENGTH TO WORST CASE 50 HEIGHT DIFFERENCE 10 ANSWER 32 Keep clicking anywhere to proceed 40 m 10 m

3. CHECK WITH CODE 402.2 10 50 10 32 RESIDUAL HEAD IS TAKEN AS 5m as per Code HEIGHT DIFF FROM START= 10 m Residual = 5 m Pressure Drop = start – Ht. diff – residual = 40 – 10 – 5 = 25m Start Press = 40 m Pressure Drop 25 m

4. CHECK WITH CODE 402.2 10 50 10 32 Pressure Drop = 25m From Code table 3.2, flow from 10 dwellings = 1.74 L/s From code table C1 the closest higher flow for length 50m is 2.02 L/s. This gives the required pipe size = 32mm