{"product_id":"armstrong-573100-007-a300-l-expansion-tank","title":"Armstrong 573100-007 A300-L Expansion Tank","description":"\u003cp\u003eThis reliable expansion tank is designed to manage excess water volume in hydronic heating systems caused by thermal expansion, effectively protecting your plumbing components from pressure spikes. The \u003cstrong\u003eArmstrong 573100-007\u003c\/strong\u003e serves as a direct replacement for the \u003cstrong\u003eA300-L\u003c\/strong\u003e model, ensuring your system maintains optimal pressure stability for consistent performance.\u003c\/p\u003e\u003cp\u003eThe unit functions by utilizing an internal bladder that separates the system water from the air cushion. As temperatures rise and water expands, the bladder compresses against the pressurized air pocket, safely absorbing the increase in volume and preventing unnecessary relief valve discharge.\u003c\/p\u003e\u003ch4\u003eKey System Performance Baselines:\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePressure Regulation:\u003c\/strong\u003e Precisely manages system fluctuations to extend component lifespan.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeamless Integration:\u003c\/strong\u003e Engineered for quick, straightforward installation in standard hydronic loops.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReliable Containment:\u003c\/strong\u003e Heavy-duty construction ensures structural integrity under continuous thermal cycling.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e⚠️ \u003cstrong\u003eApplication Profile:\u003c\/strong\u003e Ideal for residential and commercial closed-loop hydronic heating, radiant floor systems, and chilled water cooling loops where thermal expansion management is essential.\u003c\/p\u003e","brand":"Armstrong","offers":[{"title":"Default Title","offer_id":43133407952990,"sku":"573100-007","price":4727.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0663\/7151\/8558\/files\/573100_007_image_87b6d4d2-8954-4647-9401-4b4423ada3fe.png?v=1786105400","url":"https:\/\/nationalboilersupply.com\/products\/armstrong-573100-007-a300-l-expansion-tank","provider":"National Boiler Supply","version":"1.0","type":"link"}