Show or Hide

Water Safety & Flow Control



Iron Swing Check Valves


2 to 10 in. (50 to 250mm)


Series 411 Swing Check Valves are UL Listed and FM approved in sizes 2-1/2 to 10 in. (65 to 250mm). Valves feature a full port, flanged cast iron body with a black epoxy coating on all external surfaces and a Buna-N resilient disc seat designed for use on fire mains and sprinkler systems. The valve operates automatically by opening on a hinge arm with flow and closing when flow stops or is reversed.

Loading Models/UPC Codes...
Loading Models...

To preview and download BIM Drawings for this product, please select a model/size from the list.

Loading Approvals...
Loading warranty information...
Loading data...

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.

Please Note: Watts literature requires Adobe Acrobat Reader to view.

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.

Learn About

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.