Hi guys
My newly built house is connected to the water main by about 30m of 32mm o/d MDPE pipe (roughtly 26mm i/d).
At the outside tap near the stop cock, the measured static pressure is a shade over 3bar. If I leave the gauage on the outside tap and turn on an indoor tap my dynamic pressure is as follows:
Flow = 6.4 lts/min, Dynamic pressure = 2.2 bar
Flow = 4.2 ltr/min, Dynamic pressure = 2.6 bar
By my hand calculations (confirmed using www.pressure-drop.com) at 6.4 ltr/min I should expect to see a drop of just 9.3mbar, or 4.6mbar at 4.2 ltr/min. I'm seeing more than 80 times this drop so obviously I have a problem.
As I'm measuring at the outside tap, I suspect that the problem (blocked pipe causing flow restriction?) lies outside somewhere in the 30m MDPE between the mains toby connection and my stopcock.
Can anyone on here shed light on what they believe could be the cause of such a problem?
Thank you in advance
Bob
My newly built house is connected to the water main by about 30m of 32mm o/d MDPE pipe (roughtly 26mm i/d).
At the outside tap near the stop cock, the measured static pressure is a shade over 3bar. If I leave the gauage on the outside tap and turn on an indoor tap my dynamic pressure is as follows:
Flow = 6.4 lts/min, Dynamic pressure = 2.2 bar
Flow = 4.2 ltr/min, Dynamic pressure = 2.6 bar
By my hand calculations (confirmed using www.pressure-drop.com) at 6.4 ltr/min I should expect to see a drop of just 9.3mbar, or 4.6mbar at 4.2 ltr/min. I'm seeing more than 80 times this drop so obviously I have a problem.
As I'm measuring at the outside tap, I suspect that the problem (blocked pipe causing flow restriction?) lies outside somewhere in the 30m MDPE between the mains toby connection and my stopcock.
Can anyone on here shed light on what they believe could be the cause of such a problem?
Thank you in advance
Bob