How do the Wax TrapTesters™ (TES_) work?
There is a relationship between steam pressure and temperature. If a trap is working properly, typically there is a drop in pressure from the inlet pipe to the outlet pipe, thus a significant drop in temperature. The TrapTesters™ are each designed to melt at different temperatures. One would select the TrapTester™ that corresponds to the pressure the trap is set at. The TrapTester™ is then rubbed on the outlet pipe after the trap. If the TrapTester™ melts, this would indicate that the steam trap is allowing steam to “blow through” as opposed to collecting and releasing condensate only.