7 Mechanical chemical handling equipment and cleaning systems comprising proportioners for mixing and dispensing chemicals, chemical sprayers, chemical foam generators, liquid level maintenance equipment, venturi dispensers, peristaltic pumps, programmable electronic controllers for electronic chemical dispensing pumps, chemical pumps, and sprayers, chemical injectors; water-driven pumps for agricultural vaccination and medication, water treatment, laundry units, and general facility cleaning ; and mechanical chemical mixing and dispensing systems for central or point of use control and accessories therefor, namely pump by-pass manifolds, flush manifolds, depletion detection alarms, depletion detection wands, diaphragm pumps, electronic metering faucets, filters, solid dissolvers, bleed valves