The pump contains a spray opening and is connected to an inlet tube which is, in turn, connected to a chemical supply container. When the seat is raised, the piston will activate the pump. 7 The toilet opening is fitted with a pair of flat, plastic doors secured by hinges to bosses fastened to the bottom of the tank.Water Tank Supreme 1000 Ltr.20mm water seal for each cubical/good quality sanitary fitting.GI fitting with flushing line water tank to sludge tank.Brass taps.2 Nos stainless steel wash basin with PVC pillor cock per van.1 Nos. Towel Rod per van.2 Nos, of soap tray per van.