Aquasol Safety Pressure Switch for Liquid Chlorine Feeder Systems M011

The Aquasol M011 is the safety pressure switch for Aquasol liquid chlorine feeder systems, a 0 to 6 psi switch for pool equipment installed above pool level. Aquasol states that a safety pressure switch is a required component of a liquid chlorine system.

What it does

The switch removes the possibility of injecting chlorine or acid into the pool return line when there is no water flow, which can happen if the circulation pump is not running or the filter is in backwash. It is plumbed into the return line to the pool and is internally adjusted to turn on when the line has adequate pressure and off when pressure is lost. No manual reset is required.

How it is wired

The chemical feeders plug into the Aquasol controller, the controller plugs into the safety pressure switch, and the switch plugs into a 120 VAC receptacle. Because the feeders only get power through the switch, a loss of pressure shuts them off. Aquasol notes that this is one layer of protection and that swimmers should never be in the pool when the circulation system is off or down.

Choosing the right one

The M011 is the 0 to 6 psi version for equipment above pool level. Aquasol sells the M011-HP, rated 2 to 22 psi, for equipment installed below pool level. Tube fittings for the switch are sold separately as M011-115 and M011-120.