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About Us

Widespread exposure to Radon Gas in the home is a serious problem and most people don't know much about it. A 4Radon.com, our mission is to educate you about the dangers of radon and show you how easy and inexpensive it is to test your own home.

4Radon.com is a division of JMJ Supply LLC, a four year old company that offers an honest and ethical online shopping experience for consumers and businesses. We allow you to receive the lowest possible prices on all of our products. Customer satisfaction is extremely important to us because we want to become one of the top venues for consumers and business to shop for radon test kits and radon detectors.

JMJ Supply has earned an "A" Rating with the Better Business Bureau. The BBB holds us accountable for all transactions and customer interactions, so you can shop with us knowing that our company will be honest and fair.

JMJ Supply LLC specializes in the sale and support of speakers, headphones, hearing impaired devices, clocks, audio accessories, sleep machines, radon detectors and test kits, carbon monoxide detectors, combustible gas detectors and many other related products.

We provide outstanding value and 24 hour customer service. On all of our sites, you will be able to get detailed product descriptions and specifications to help you to make an informed purchasing decision. We want you to enjoy shopping with us, as well as help take the confusion out of buying products online. Save time, dollars and gas, and receive fast shipping to your home or business!

4Radon.com is a division of:

JMJ Supply LLC
8536 Terminal Rd STE R
Lorton, VA 22079
Phone: 1-800-520-9891
Local: 703-372-2445
Fax: 1-888-492-2850


We specialize in high quality Radon Testing Devices. A Radon Detector or Radon Test Kit can allow you to easily determine if your home is safe from this dangerous, invisible, tasteless and odorless gas. Radon is the #1 source of lung cancer in non-smokers, causing more than 20,000 deaths per year. About one in every fifteen U.S. homes are unsafe, and many more have unhealthy Radon Gas Levels.