PRE-CHARGED "P" CONTROLS
American On-site Control's "P" series controls automatically maintain the proper water pressure in tanks with internally installed bladders (no air compressor or external air supply is required). The system utilizes bourdon tube type pressure switches for precise pressure measurement, and no other external components or sensors are necessary. Each control comes standard with output for well/booster pump(s).

STORAGE TANK "ST" CONTROLS
American On-Site Control's "ST" series controls automatically maintain the proper water level in vented storage tanks utilizing solid state liquid level measurement. Each control comes standard with output for well pump(s). Stainless steel electrode sensors for each level to be measured, and a brass electrode holder assembly for tank mounting are required and ordered separately.

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