An upgraded version of the reliable hs38, the Pearl is designed to protect a single piece of equipment, such as a tankless water heater, from the effects of scale and decrease the risk of waterborne biological contamination. Other popular applications include small studio apartments and recreational vehicles (RVs). The unit fits Copper/PVC/PEX pipes up to 1” outer diameter. This is a do it yourself (DIY) product, but professional installation may be available in your area.