Mounts to sight glass tappings. Maintains water level between two probes. Designed to operate with existing water feeder. Includes 711C manifold, two model EL1214 probes and quick hook-up fittings. Note: The 711 & 724 Series is recommended for use on older boilers that do not have tappings suitable for Safgard 400 and CycleGard 400 Series cut-offs.
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