{"product_id":"4-8g-hydronic-expansion-tank","title":"4.8G HYDRONIC EXPANSION TANK","description":"\u003cp data-start=\"0\" data-end=\"117\"\u003e\u003cstrong data-start=\"0\" data-end=\"12\"\u003eZHT18-30\u003c\/strong\u003e is a \u003cstrong data-start=\"18\" data-end=\"60\"\u003eZilmet Cal-Pro hydronic expansion tank\u003c\/strong\u003e used in residential and light commercial boiler systems.\u003c\/p\u003e\n\u003ch3 data-section-id=\"1gquwrv\" data-start=\"119\" data-end=\"142\"\u003eProduct description\u003c\/h3\u003e\n\u003cp data-start=\"143\" data-end=\"310\"\u003eZilmet ZHT18-30 Hydronic Expansion Tank\u003cbr data-start=\"182\" data-end=\"185\"\u003eThis model is a \u003cstrong data-start=\"201\" data-end=\"241\"\u003e~4.8-gallon diaphragm expansion tank\u003c\/strong\u003e designed to absorb thermal expansion in closed-loop heating systems.\u003c\/p\u003e\n\u003ch3 data-section-id=\"x9uv27\" data-start=\"312\" data-end=\"334\"\u003eKey specifications\u003c\/h3\u003e\n\u003cul data-start=\"335\" data-end=\"874\"\u003e\n\u003cli data-section-id=\"10vvy4w\" data-start=\"335\" data-end=\"397\"\u003e\n\u003cstrong data-start=\"337\" data-end=\"346\"\u003eType:\u003c\/strong\u003e Hydronic expansion tank (boiler\/heating systems)\u003c\/li\u003e\n\u003cli data-section-id=\"1mnozo8\" data-start=\"398\" data-end=\"478\"\u003e\n\u003cstrong data-start=\"400\" data-end=\"413\"\u003eCapacity:\u003c\/strong\u003e 4.8 gallons (≈18 liters) \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"vr6oo6\" data-start=\"479\" data-end=\"566\"\u003e\n\u003cstrong data-start=\"481\" data-end=\"496\"\u003eConnection:\u003c\/strong\u003e 1\/2\" NPT (some variants 3\/4\") \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1aeoj09\" data-start=\"567\" data-end=\"649\"\u003e\n\u003cstrong data-start=\"569\" data-end=\"586\"\u003eMax pressure:\u003c\/strong\u003e 60 PSI (common rating) \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"vjjype\" data-start=\"650\" data-end=\"718\"\u003e\n\u003cstrong data-start=\"652\" data-end=\"672\"\u003eMax temperature:\u003c\/strong\u003e 210°F \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1rxljk9\" data-start=\"719\" data-end=\"754\"\u003e\n\u003cstrong data-start=\"721\" data-end=\"735\"\u003ePrecharge:\u003c\/strong\u003e Typically 12 PSI\u003c\/li\u003e\n\u003cli data-section-id=\"j7js15\" data-start=\"755\" data-end=\"821\"\u003e\n\u003cstrong data-start=\"757\" data-end=\"770\"\u003eMaterial:\u003c\/strong\u003e Carbon steel tank with internal rubber diaphragm\u003c\/li\u003e\n\u003cli data-section-id=\"1lco65a\" data-start=\"822\" data-end=\"874\"\u003e\n\u003cstrong data-start=\"824\" data-end=\"840\"\u003eOrientation:\u003c\/strong\u003e Vertical or inline installation\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ZILMET USA","offers":[{"title":"Default Title","offer_id":52411523268897,"sku":"ZHT18-30","price":69.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0943\/1905\/1041\/files\/download_3_d83f8421-d6b2-41a3-98f2-0af5fc22841d.jpg?v=1777402054","url":"https:\/\/standardvmi.com\/products\/4-8g-hydronic-expansion-tank","provider":"Standard Plumbing Supply","version":"1.0","type":"link"}