{"product_id":"armstrong-110223-309-circulating-pump-with-union-connection","title":"Armstrong 110223-309 Circulating Pump with Union Connection","description":"\u003cp\u003eThe Armstrong 220SSU circulating pump delivers continuous hot‑water flow throughout residential and light‑commercial hydronic systems, ensuring rapid temperature recovery and energy efficiency. This unit, model \u003cb\u003e110223-309\u003c\/b\u003e, features a sturdy union connection for fast, leak‑free installation.\u003c\/p\u003e\u003cp\u003eOperated by a fully‑sealed magnetic‑drive motor, the pump maintains precise flow rates while minimizing noise. The cast‑iron housing and stainless‑steel impeller provide durability, and the integrated union allows easy integration with existing pipework without additional fittings.\u003c\/p\u003e\u003ch4\u003eKey System Performance Baselines:\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eUnion Connection:\u003c\/b\u003e Threaded union fitting enables quick, leak‑free pipe integration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCast‑Iron Housing:\u003c\/b\u003e Provides robust durability for long‑term operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMagnetic‑Drive Motor:\u003c\/b\u003e Ensures seal‑free operation, reducing maintenance needs.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e⚠️ \u003cstrong\u003eApplication Profile:\u003c\/strong\u003e Ideal for residential boiler recirculation loops, small‑scale commercial heating systems, domestic water heater recirculation, and retrofit projects where a compact union‑connected pump is required.\u003c\/p\u003e","brand":"Armstrong","offers":[{"title":"Default Title","offer_id":43123862569054,"sku":"110223-309","price":498.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0663\/7151\/8558\/files\/110223_309_image_788fc079-b634-4bf6-9d11-97fa7219cb93.png?v=1786020498","url":"https:\/\/nationalboilersupply.com\/products\/armstrong-110223-309-circulating-pump-with-union-connection","provider":"National Boiler Supply","version":"1.0","type":"link"}