Circle Manufacturing Co. started with Manufacturing of Test plugs in 1975.

In business for 25 years, we ship orders anywhere from our complete inventory within 24 hours. If you don't see it on the website, we can build it - any size, any type, any testing pressure. We can even custom-engineer your testing requirements.

We have now recently introduced a complete line of Cast Iron Submersible Sump Pumps. These are High quality, rugged, reliable and energy efficient pumps.

Call anytime. We attend to all inquiries promptly and courteously.