skype: sophyaxia Pressure flushing device,Toilet water tank,bathroom,toilet,sanitary ware,water tankToiletcistern,toilet clean mate ,Pressure tank ,toilet ,clean ... water into the bowl, so instead of the "pulling" or siphon action of a gravity unit, the pressure-assist ... are hydraulically designed to "push" contents out of the trap way instead of gravity siphoning. Siphoning requires a more complicated ...