The Sewerin Combiphon pulse generator system offers a method to locate non-metallic plastic pipes using a Sewerin acoustical leak detector to listen for sounds produced by the Combiphon and its two modes. The two ways of transmitting noise to the targeted pipe include a "Striker," which acts as an electronic hammer when attached around a pipe, steadily striking vibration onto it. The other method features a "Stopper," typically installed near a fire hydrant, which injects a pulse into the water column itself where sound travels farther.
