If you could measure the internal pressure in a pipe upstream and downstream of the suspect section or valve with water flowing you could judge whether the pressure drop is within limits, just like using a voltmeter in an electrical circuit.
There may be a noninvasive way to do this if you have a micrometer.
You measure the Outside Diameters of the upstream & downstream pipes while unpressurized, then repeat with water flowing. The OD ratios should give some measure of the pressure differences.
If I can get my hands on a micrometer I'd like to try this. For one time use I guess one could be built with a system of levers.
There may be a noninvasive way to do this if you have a micrometer.
You measure the Outside Diameters of the upstream & downstream pipes while unpressurized, then repeat with water flowing. The OD ratios should give some measure of the pressure differences.
If I can get my hands on a micrometer I'd like to try this. For one time use I guess one could be built with a system of levers.
