Harvesting rainwater

The storage tank can be either part of the structure of the building or a separate self-contained unit. * Pressurized pumping, treating and filtering systems. Components such as pumps, solenoid valves, three-way valves, expansion tanks, etc., will require separate feeds, conduits and disconnects. All plumbing and electrical connections to and from the various parts of the system should be clearly visible - i.e., pumps, remote valves (solenoid and manual), expansion and/or buffer tanks. Water collected from different surfaces will have differing water constituent pollutants, such as grit, dust, bird droppings, oils and hydrocarbons (from parking and driving surfaces).