[Standard Equipment & Controls Standard Equipment and Controls supplies Chemical Metering Pumps, accessories for chemical metering pump systems such as Back Pressure Valves, Pressure Relief Valves, Calibration Columns, Injection Valves, Pulsation Dampeners, Inlet Stabilizers, Pressure Gauges with Diaphragm Seals, Static Mixers, pH Electrodes & Ion Selective Electrodes. We also supply Sump Pumps, Tank Wash Machines and Biodegradable Liquid Descaler.]