[lips1254]

What is the permissible pressure drop over the test period when air testing sanitary pipework, in mm please

[speedball1]

We test our drainage by filling the stacks with water and letting them set overnight for inspection the next day. For a air test The air pressure must not drop over a ten (10) minute period.. Different areas have different standards. Check with your local Building Department. Good luck, Tom

[Milo Dolezal]

Tom said it. We also do gravity water tests on drains/vents and do air tests on gas piping.

However, for TracPipe or Poly Gas Piping, our Inspectors require these systems to be pressurized at 60psi.