Clow Valve Company
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
Resilient Seated Gate Valves
Enhance your pipeline efficiency with our resilient seated gate valve—designed for compact installations without compromising performance. Engineered with a ductile iron body and a fully encapsulated EPDM rubber seat, this valve ensures tight sealing, corrosion resistance, and smooth operation in water and wastewater systems. Compliant with AWWA C515 or AWWA C509 standards, this valve delivers reliable shutoff and long service life for municipal, industrial, and utility applications.
Eccentric Plug Valves
McWane Plant & Industrial’s Eccentric Plug Valves (EPVs) provide reliable flow control for water, wastewater, and industrial systems, featuring a full-flow body, nickel-welded seat, and Buna-N encapsulated plug for long-lasting performance. Designed to meet AWWA C517 standards, these valves are available in sizes from 3" to 48" with manual, electric, pneumatic, or hydraulic actuation options—delivering durable, low-maintenance shutoff in demanding environments.
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.