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Water Safety & Flow Control


OEM-24, OEM-170, OEM-550, OEM-650, OEM-750

Low Water Cut-offs for Hot Water Boilers


Series OEM-24, OEM-170, OEM-550, OEM-650, OEM-750 Low Water Cut-offs for Hot Water Boilers feature reliable electronic operation. A probe is installed in the boiler shell or external manifold and connected to the control unit. When water is in contact with the probe, the circuit is completed; when the water level drops below the probe, the circuit opens. Available in 24 or 120 volt models. Maximum Working Pressure: 160psi (1 bar).

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Disclaimer: Watts product dimensions in U.S. customary units and metric are approximate and are provided for reference only. For precise measurements, please contact Watts Technical Service. Watts reserves the right to change or modify product design, construction, specifications, or materials without prior notice and without incurring any obligation to make such changes and modifications on Watts products previously or subsequently sold.

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Additional Information

Danger – Scalding Lurks!

Every year, thousands of people suffer serious thermal shock or scalding injuries in their bathtubs, sinks and showers.

Click here for informative resources to help you protect against these dangers.

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Thermostatic Mixing Valves

Every year thousands suffer injuries as a result of hot water scalding and thermal shock injuries. Thermostatic mixing valves protect against these dangers.

To learn more about thermostatic mixing valves and how they work, click here.