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Water Safety & Flow Control


2000-M5, 2000S-M5

Hydronic, Two-Way, Universal Flow Check Valves


3/4 to 3 in. (20 to 80mm)


Series 2000-M5, 2000S-M5 Hydronic, Two-Way, Universal Flow Check Valves are for use in commercial and residential hydronic heating systems to provide positive shutoff when circulator is not running, preventing flow of water to radiation units. They are easily opened for gravity circulation. Model 2000-M5 combines angle and horizontal checks and consists of an iron body construction with female threaded connections, bronze seat, and brass center guide. Model 2000S-M5 consists of a straight pattern design with a bronze body construction and solder connections, bronze seat, and brass center guide. Sizes 3/4 to 1 1/4 in. (20 to 32mm) Maximum Pressure: 50psi (344.8kPa); Sizes 1 1/2 to 3 in. (40 to 80mm) - Maximum Pressure: 125psi (8.6 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

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