Clow Valve Company: American-Made Valves & Hydrants Since 1878
Founded in 1878 as James B. Clow & Sons, Clow Valve Company is one of the oldest and most respected names in the waterworks industry. Now a proud member of the McWane Plant & Industrial family, Clow Valve manufactures a full line of AWWA-compliant valves and fire hydrants that serve municipalities, utilities, and contractors across North America. With a legacy built on quality, innovation, and American manufacturing, Clow is a trusted partner for critical water infrastructure projects.
Engineered for Municipal Excellence
Clow Valve products are designed and manufactured in the United States using advanced foundry and machining technologies. Every valve is built to meet or exceed AWWA standards and is rigorously tested for performance, durability, and reliability in the field. Whether for new installations or system upgrades, Clow’s solutions are engineered to deliver long-term value and operational efficiency.
Comprehensive Product Line
Clow Valve Company offers a wide range of waterworks products, including:
- Resilient Seated Gate Valves
AWWA C509 Full Wall and C515 Reduced Wall designs for superior sealing and durabilit - Plug Valves
AWWA C517-compliant eccentric plug valves. - Swing Check Valves
AWWA C508-compliant with optional lever-and-spring or lever-and-weight configurations.
All Clow products are available with a variety of coatings, linings, and actuation options to meet specific project requirements.
Made in the USA. Built to Last.
Clow Valve operates state-of-the-art manufacturing facilities in Oskaloosa, Iowa, and Riverside, California. These vertically integrated plants allow Clow to control every step of the production process—from casting and machining to assembly and testing—ensuring consistent quality and fast lead times. Clow’s commitment to American manufacturing also supports AIS and BABA compliance for federally funded infrastructure projects.
Why Choose Clow Valve Company?
- Over 145 years of waterworks manufacturing expertise
- Full line of AWWA-compliant valves and hydrants
- Made in the USA with AIS/BABA compliance
- Proven performance in municipal and utility systems
- Backed by McWane’s nationwide support and distribution network
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Resilient Seated Gate Valves
McWane Plant & Industrial offers both our KS FW AWWA C509 Full Wall and KS RW AWWA C515 Reduced Wall resilient seated gate valves, embodying the latest valve technology for simplicity, durability, and superior performance.
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Eccentric Plug Valves
McWane Plant & Industrials' AWWA Eccentric Plug Valves are designed and manufactured in conformance with AWWA C517 standard. Available in sizes 3"-48"
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AWWA Swing Check Valves (AIS/BABA)
McWane Plant & Industrials' AWWA Swing Check Valves are designed and manufactured in conformance with AWWA C508 and are for use on water, oil and gas lines. Under certain circumstances where it is desirable to have more positive control of the closing of the disc, the valves can be supplied with either lever-and-spring or lever-and-weight.
