Gavin has recently qualified as a licensed plumber, specializing in the supply and installation of energy efficient hot water units. Some of Gavin's customers pay him on a part-time basis, even though he has already supplied and installed a new hot water unit for them. Gavin is worried that he may not be completely paid, or worse, that a dishonest customer may try to remove and sell a newly installed unit to an unsuspecting buyer.

Explain how thePersonal Property Securities Actmay assist Gavin in such a situation.