Profile: John Davidson (Pipes) Ltd. is a distributor of water management systems. We offer services for commercial, public and industrial building as well as civil engineering, utilities and agricultural projects. Our products provide solutions for storm water retention, syphonic roof drainage, adoptable sewers, drainage & pressure/service pipes and fittings. Features of our rainwater harvesting systems are sustainable, flood prevention and less energy consumption. There are two system options of this system gravity and direct system. The main advantage of gravity system is that in the event of power failure or rain stocks running dry, the system will automatically switch to mains water supply to ensure continuity of service. The direct system is used where it is impractical to have a header tank, therefore water is pumped straight from the underground holding tank to the various appliances. The main advantage of this system is that rainwater is delivered to the appliances at mains pressure.