{"product_id":"amtrol-ex-15-extrol-expansion-tank-2-gal-for-closed-hydronic-heating-cooling","title":"Amtrol EX-15 Extrol Expansion Tank — 2 Gal for Closed Hydronic Heating \u0026 Cooling","description":"\u003cdiv\u003e\n  \u003ch2\u003eOverview\u003c\/h2\u003e\n  \u003cp\u003eThe Amtrol EX-15 Extrol expansion tank is a compact diaphragm-style reservoir designed for closed hydronic heating and cooling loops. Patented in 1954, Extrol helped popularize easier pressure control and steadier water flow in a wide range of radiant, boiler, and packaged system configurations.\u003c\/p\u003e\n  \u003ch3\u003eKey benefits at a glance\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e2 gallon capacity provides a compact buffer to absorb volume changes\u003c\/li\u003e\n    \u003cli\u003eNot intended for potable water; ideal for sealed heating and cooling circuits\u003c\/li\u003e\n    \u003cli\u003eFactory precharge of 12 psig supports quick setup on many systems\u003c\/li\u003e\n    \u003cli\u003eMax working pressure of 100 psig and max operating temperature of 240°F for robust operation\u003c\/li\u003e\n    \u003cli\u003eWatertight reservoir and thick Butyl\/EPDM diaphragm aimed at long service life\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003ch3\u003eHow it works in real life\u003c\/h3\u003e\n  \u003cp\u003eAs a closed-loop system heats and cools, the tank accepts expanded water, helping stabilize pressure and smooth pump cycling. The result can be more comfortable temperature swings and quieter operation in scenarios like radiant floor heating or packaged boiler loops.\u003c\/p\u003e\n  \u003cp\u003eBecause it’s a dedicated expansion solution, it can contribute to system reliability by buffering pressure peaks that occur when boilers start or valves close.\u003c\/p\u003e\n  \u003ch3\u003eSpecifications at a glance\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eCapacity: 2 gallons (EX-30 is the larger model)\u003c\/li\u003e\n    \u003cli\u003ePrecharge: 12 psig\u003c\/li\u003e\n    \u003cli\u003eMax working pressure: 100 psig\u003c\/li\u003e\n    \u003cli\u003eMax operating temperature: 240°F\u003c\/li\u003e\n    \u003cli\u003eConstruction: watertight reservoir with thick diaphragm\u003c\/li\u003e\n    \u003cli\u003eApplication: closed hydronic heating and cooling systems only\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003ch3\u003eDurability and reliability\u003c\/h3\u003e\n  \u003cp\u003eDurability and reliability come from a thick Butyl\/EPDM diaphragm that resists aging and maintains elasticity across temperature swings, while a robust reservoir keeps expanded water sealed away from the rest of the system. The 2-gallon size is ideal for tight spaces, offering a balance between buffering capacity and footprint.\u003c\/p\u003e\n  \u003ch3\u003eInstallation and care tips\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eUse only in non-potable, closed systems per local codes\u003c\/li\u003e\n    \u003cli\u003eVerify precharge is matched to system design if required\u003c\/li\u003e\n    \u003cli\u003eInspect for leaks and ensure proper mounting to prevent vibration\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003cp\u003eNote: This tank is part of a long‑standing family of Extrol products known for dependable pressure control in many types of hydronic plumbing. Results depend on the overall system design and operating conditions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What is the Amtrol EX-15 Extrol expansion tank used for?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: It serves as a pressure-buffer in closed hydronic heating and cooling loops to smooth water volume changes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What are the key specs of the EX-15?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Capacity: 2 gallons; precharge 12 psig; max working 100 psig; max temperature 240°F; not for potable water.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Amtrol","offers":[{"title":"Default Title","offer_id":47502129004718,"sku":"B003QSAH38","price":151.15,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0735\/6012\/9710\/files\/amtrol-ex15-extrol-expansion-tank-front-view.jpg?v=1770972832","url":"https:\/\/handyskook.ca\/products\/amtrol-ex-15-extrol-expansion-tank-2-gal-for-closed-hydronic-heating-cooling","provider":"HandySkook","version":"1.0","type":"link"}