Clow Valve Company - A Division of McWane, Incorporated

Clow Valve Company - A Division of McWane, Incorporated

Clow Valve Company produces waterworks valves and fire hydrants in Oskaloosa, Iowa, and Corona, California. For more than 130 years, Clow Valve has been servicing its customers as one of the United States` premiere manufacturers of iron valves and hydrants for the waterworks industry. Since 1878, our facilities have grown, and they continue to be improved through capital expenditures.

Company details

902 South 2nd St , Oskaloosa , Iowa 52577 USA


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Business Type:
Industry Type:
Water and Wastewater
Market Focus:
Nationally (across the country)
Year Founded:

Our relationships with our customers allow us to anticipate their needs, provide a superior level of service and, ultimately, help them focus on the intricacies of their business, without worrying about their experience with us. Consequently, our customers frequently see the benefits of doing business with us directly on their bottom line. Our employees, stability, lasting relationships, sound decision making and unwavering commitment to quality and customer service ensure that our customers will continue to enjoy partnering with Clow.

Clow Valve Company’s roots date back to 1878. Then known as James B. Clow & Sons, the company was a jobber of wrought iron pipe and other foundry products. In 1890, Clow added fire hydrants and waterworks valves to its line by becoming a distributor for the Eddy Valve Company of Waterford, N.Y.

In the 1940s, Clow purchased the Eddy Valve Company and the Iowa Valve Company of Oskaloosa, Iowa. The combination of these two companies enabled Clow to become national in scope, making further expansion possible. In 1972, Rich Manufacturing Company of Corona, Calif., was acquired. This added the wet barrel fire hydrant to Clow’s already significant product line of waterworks products.

In 1985, McWane, Inc. purchased all of Clow Corporation’s stock, and Clow became a wholly owned subsidiary. In 1996, the Waterworks Division of Long Beach Iron Works was acquired by Clow, adding to the extensive fire hydrant line.

Today, Clow Valve Company operates at two locations: Oskaloosa, Iowa, and Corona, Calif. The Oskaloosa plants include iron and brass foundries, a machine shop, assembly, finished goods warehousing, shipping and administrative offices. The Corona plant manufactures and assembles wet barrel fire hydrants and maintains inventories of other Clow products. We are proud to continue our history of offering manufactured products that comply with “Made in the USA” requirements.