{"product_id":"zurn-xt-18","title":"WILKINS XT-18 18 LITER EXPANSION TANK","description":"SPECIAL ORDER ITEM. Review Returns Policy before purchase. The Zurn thermal expansion tank collection provides essential protection for your water heating system by managing pressure fluctuations. Designed to be installed between the backflow preventer or pressure reducing valve and the water heater, this unit effectively safeguards your plumbing infrastructure against thermal expansion. When system pressure rises, water enters the tank's polypropylene lined water chamber, which expands a diaphragm into a pre-charged air chamber. This process keeps system pressure safely below the relief valve setting, preventing unnecessary discharge and extending the lifespan of your water heater.","brand":"Zurn","offers":[{"title":"Default Title","offer_id":47622383173870,"sku":"99438","price":84.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0782\/9376\/2286\/files\/4a63366c9301f66da75bdfea39e0b019f020b676.jpg?v=1779117475","url":"https:\/\/www.relyonpdi.com\/products\/zurn-xt-18","provider":"PDI Kitchen, Bath \u0026 Lighting","version":"1.0","type":"link"}