Dupree Products is a small, family owned business located in Minnesota. The company started in the 1960’s with the manufacturing of twist lock waste valves (originally branded as Owens or Dupree valves). It is common to get inquiries from camper and motorhome owners that are still using these valves 45+ years later! The simplicity of changing the seal and robust construction should keep them going another 50+ years.

In the 1980’s the business expanded with the addition of Treatzall for waste tank treatment. Treatzall has been going strong all of these years with a very loyal following, but was a bit hard to locate. In 2021 Treatzall became available on Amazon with Prime 2-day shipping. No caking, no perfumes, no dyes and it works!

As the business was growing, the simplicity of the twist lock waste valve proved it’s flexibility with the addition of an air powered valve to make dumping the tanks even easier. The air valves use the same housings as the twist lock valves along with a custom air cylinder that operates the gate open or closed in around 1 second. These valves have been used in many high end motorcoaches, tour buses and other innovative applications that need an air operated valve.

Dupree Products also sells a limited set of parts to keep some of the older coaches on the road that are either new old stock or distributed by vendors as more specialty items. The owners both own classic coaches and are passionate about enjoying them with their families for many years to come!