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Illinois law requires that your RPZ device is tested annually by a licensed plumber with a Cross Connection Certification License.  After a successful inspection, the plumber will forward certification paperwork to the municipality.

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Ravinia Plumbing has licensed plumbers with a Cross Connection Certification License that can install an RPZ device and conduct the annual inspection. We’ve been in business since 1928, and we’ve made a name for ourselves as one of the most trusted and reliable plumbing, sewer, heating and air conditioning, and electrical companies in Chicagoland. Visit Ravinia Plumbing today to learn more.

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Reduced Pressure Zone (RPZ) devices are a little known – but very important – plumbing device. Why? Because these devices prevent contamination, bacteria, and pollution from contaminating the water coming into your home. On a larger scale, they also prevent these contaminants from entering the municipal water supply.

This is where the RPZ device comes in. When the water pressure drops, the RPZ device (sometimes called the RPZ valve) opens and dumps the impure water out of the bottom of the device, preventing potentially contaminated water from entering your drinking water and municipal or city water supply.

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“The service technician who comes to the house is always very professional, knowledgeable, and friendly.  I appreciate that the same technician comes to our home for our semi-annual maintenance checks.”

You need an RPZ backflow preventer device if you have any of the several systems mentioned above that can potentially allow contaminants to enter your water supply. These contaminants can infiltrate your water supply when reduced pressure exists in the piping that carries water into your home, causing potentially contaminated water to back into the main water supply.  This reduced pressure can be caused by: