The 450mm (18in) Bailey Drain Test Plug with Brass Cap is the ultimate solution for testing the largest diameter sewer and drainage systems. This heavy-duty plug incorporates centre locking design with steel plates, steel wing nuts and a brass blanking cap, delivering exceptional performance for major infrastructure and industrial drainage testing projects. The 450mm size is specifically engineered for main trunk sewers, large industrial outfalls, and major municipal drainage systems where maximum sealing capacity and structural strength are paramount. The brass cap maintains superior corrosion resistance in the harshest environments, whilst the robust steel construction ensures integrity under extreme testing pressures. Features and Benefits:450mm (18in) size for largest diameter sewer systemsMaximum-strength steel construction for extreme test conditionsBrass blanking cap resists corrosion in demanding environmentsCentre locking design ensures reliable, even pressure dist