The Kleinn FIT56 complete fittings kit supplies the 1/4" NPT fittings used in HK5 or HK6 Problaster Horn Kits, including the kit-specific pressure switch, safety valve, drain cock, elbow compression fitting, momentary push button and a vial of thread sealant. It’s a consolidated parts pack intended to support assembly, maintenance, or repair of those Problaster kits.
Kleinn HK5 Complete Set of Fittings