Company: A. O. Smith

Product: X3™ Scale Prevention Technology

Description: Included on the ProLine® XE Gas Tankless models, AT-199X3P, AT-180X3P, and AT-160X3P, this technology was designed to prevent scale in residential tankless water heaters. According to the company, the product extends the life of units up to three times longer and requires no descaling. The combustion system operates on a ½-inch gas line and vents with 2-inch PVC. The product is available in three sizes with maximum BTU/H inputs of 160K, 180K, and 199K. All models come with an integrated recirculation pump providing instant hot water. The units are Energy Star® qualified with UEFs up to 0.93. 

Contact: 877-552-0010,, eProduct 186

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