{"product_id":"13-2-gal-floor-hyd-exp-tank","title":"13.2 GAL FLOOR HYD EXP TANK","description":"\u003csection class=\"text-token-text-primary w-full focus:outline-none [--shadow-height:45px] has-data-writing-block:pointer-events-none has-data-writing-block:-mt-(--shadow-height) has-data-writing-block:pt-(--shadow-height) [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-(--header-height)\" dir=\"auto\" data-turn-id=\"e9e01c88-28da-4402-8375-65680ff5973f\" data-testid=\"conversation-turn-5\" data-scroll-anchor=\"false\" data-turn=\"user\"\u003e\u003c\/section\u003e\n\u003csection class=\"text-token-text-primary w-full focus:outline-none [--shadow-height:45px] has-data-writing-block:pointer-events-none has-data-writing-block:-mt-(--shadow-height) has-data-writing-block:pt-(--shadow-height) [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto [content-visibility:auto] supports-[content-visibility:auto]:[contain-intrinsic-size:auto_100lvh] R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" data-turn-id=\"request-WEB:982e40f8-fde4-4227-9fb3-5742eb15accc-12\" data-testid=\"conversation-turn-6\" data-scroll-anchor=\"false\" data-turn=\"assistant\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\"\u003e\n\u003cdiv class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\u003cdiv data-message-author-role=\"assistant\" data-message-id=\"8b84a1fa-1808-410f-8251-b3e2a86077b2\" data-turn-start-message=\"true\" dir=\"auto\" data-message-model-slug=\"gpt-5-3-mini\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+\u0026amp;]:mt-1\" tabindex=\"0\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert w-full wrap-break-word light markdown-new-styling\"\u003e\n\u003cp data-start=\"0\" data-end=\"111\"\u003e\u003cstrong data-start=\"0\" data-end=\"10\"\u003eZHT50F\u003c\/strong\u003e is a \u003cstrong data-start=\"16\" data-end=\"86\"\u003eZilmet Cal-Pro hydronic expansion tank (large floor-mounted model)\u003c\/strong\u003e used in heating systems.\u003c\/p\u003e\n\u003ch3 data-section-id=\"1gquwrv\" data-start=\"113\" data-end=\"136\"\u003eProduct description\u003c\/h3\u003e\n\u003cp data-start=\"137\" data-end=\"333\"\u003e\u003cspan class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"\u003e\u003cspan class=\"whitespace-normal\"\u003eZilmet ZHT50F Cal‑Pro 13.2 Gallon Hydronic Expansion Tank\u003c\/span\u003e\u003c\/span\u003e\u003cbr data-start=\"174\" data-end=\"177\"\u003eThe ZHT50F is a \u003cstrong data-start=\"193\" data-end=\"239\"\u003e13.2-gallon diaphragm-style expansion tank\u003c\/strong\u003e designed for closed-loop hydronic heating systems (boilers, radiant heat, baseboard systems).\u003c\/p\u003e\n\u003ch3 data-section-id=\"x9uv27\" data-start=\"335\" data-end=\"357\"\u003eKey specifications\u003c\/h3\u003e\n\u003cul data-start=\"358\" data-end=\"809\"\u003e\n\u003cli data-section-id=\"1577u1e\" data-start=\"358\" data-end=\"420\"\u003e\n\u003cstrong data-start=\"360\" data-end=\"369\"\u003eType:\u003c\/strong\u003e Hydronic expansion tank (closed heating systems)\u003c\/li\u003e\n\u003cli data-section-id=\"13ph608\" data-start=\"421\" data-end=\"529\"\u003e\n\u003cstrong data-start=\"423\" data-end=\"436\"\u003eCapacity:\u003c\/strong\u003e 13.2 gallons total (≈ 8.1 gallons acceptance volume) \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1fz1aw1\" data-start=\"530\" data-end=\"563\"\u003e\n\u003cstrong data-start=\"532\" data-end=\"552\"\u003eConnection size:\u003c\/strong\u003e 3\/4\" NPT\u003c\/li\u003e\n\u003cli data-section-id=\"1lb09yn\" data-start=\"564\" data-end=\"592\"\u003e\n\u003cstrong data-start=\"566\" data-end=\"583\"\u003eMax pressure:\u003c\/strong\u003e 60 PSI\u003c\/li\u003e\n\u003cli data-section-id=\"1tczkb3\" data-start=\"593\" data-end=\"623\"\u003e\n\u003cstrong data-start=\"595\" data-end=\"615\"\u003eMax temperature:\u003c\/strong\u003e 210°F\u003c\/li\u003e\n\u003cli data-section-id=\"1i2ezae\" data-start=\"624\" data-end=\"649\"\u003e\n\u003cstrong data-start=\"626\" data-end=\"640\"\u003ePrecharge:\u003c\/strong\u003e 12 PSI\u003c\/li\u003e\n\u003cli data-section-id=\"1fx8qog\" data-start=\"650\" data-end=\"749\"\u003e\n\u003cstrong data-start=\"652\" data-end=\"665\"\u003eMaterial:\u003c\/strong\u003e Carbon steel tank with SBR rubber diaphragm \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1gj84lc\" data-start=\"750\" data-end=\"809\"\u003e\n\u003cstrong data-start=\"752\" data-end=\"765\"\u003eMounting:\u003c\/strong\u003e Floor-mounted (larger “Cal-Pro” style tank)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"1urilu4\" data-start=\"811\" data-end=\"827\"\u003eWhat it does\u003c\/h3\u003e\n\u003cp data-start=\"828\" data-end=\"887\"\u003eThis tank absorbs water expansion when the boiler heats up:\u003c\/p\u003e\n\u003cul data-start=\"888\" data-end=\"1044\"\u003e\n\u003cli data-section-id=\"dmk7u0\" data-start=\"888\" data-end=\"924\"\u003eWater expands as temperature rises\u003c\/li\u003e\n\u003cli data-section-id=\"1fknuir\" data-start=\"925\" data-end=\"971\"\u003eThe diaphragm compresses air inside the tank\u003c\/li\u003e\n\u003cli data-section-id=\"1m9usm3\" data-start=\"972\" data-end=\"1044\"\u003eThis prevents pressure spikes, leaking relief valves, or system damage\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"a7xjq3\" data-start=\"1046\" data-end=\"1065\"\u003eWhere it’s used\u003c\/h3\u003e\n\u003cul data-start=\"1066\" data-end=\"1198\"\u003e\n\u003cli data-section-id=\"1394754\" data-start=\"1066\" data-end=\"1112\"\u003eMedium-to-large residential boiler systems\u003c\/li\u003e\n\u003cli data-section-id=\"1tvkk1\" data-start=\"1113\" data-end=\"1166\"\u003eCommercial or multi-zone hydronic heating systems\u003c\/li\u003e\n\u003cli data-section-id=\"624e2q\" data-start=\"1167\" data-end=\"1198\"\u003eRadiant floor heating loops\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e","brand":"ZILMET USA","offers":[{"title":"Default Title","offer_id":52411525005601,"sku":"ZHT50F","price":282.65,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0943\/1905\/1041\/files\/shopping_7bdd844c-769e-43fb-b3dd-a066becee0c2.webp?v=1777394359","url":"https:\/\/standardvmi.com\/products\/13-2-gal-floor-hyd-exp-tank","provider":"Standard Plumbing Supply","version":"1.0","type":"link"}