{"product_id":"grundfos-559601-cast-iron-4-bolt-pump-flange-set-2-1-2-npt-pair","title":"Grundfos 559601 Cast Iron 4-Bolt Pump Flange Set, 2-1\/2\" NPT (Pair)","description":"\u003cp\u003eThe Grundfos 559601 is a pair of cast iron 4-bolt pump flanges with 2-1\/2\" NPT threaded connections, used to connect a flanged circulator to threaded pipe.\u003c\/p\u003e\u003cp\u003eEach flange threads onto the pipe and bolts to the pump's 4-bolt flange, so the circulator can be removed for service without cutting the piping. Cast iron flanges are normally used on closed-loop hydronic heating and cooling systems.\u003c\/p\u003e\u003cp\u003eBefore ordering: confirm that your pump has a 4-bolt flange pattern that matches this 2-1\/2\" set and that your pipe is 2-1\/2\" NPT. Check the pump documentation for the correct gaskets and bolts.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Grundfos\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e 559601\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Pump flange set (pair)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 2-1\/2\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnection:\u003c\/strong\u003e NPT (threaded)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlange Pattern:\u003c\/strong\u003e 4-bolt\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Cast Iron\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Pump Flanges \u0026amp; Accessories\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eSee also: \u003ca href=\"\/collections\/pump-flanges-accessories\"\u003epump flanges \u0026amp; accessories\u003c\/a\u003e, \u003ca href=\"\/collections\/grundfos\"\u003eall Grundfos products\u003c\/a\u003e.\u003c\/p\u003e","brand":"Grundfos","offers":[{"title":"Default Title","offer_id":50517471101031,"sku":"GRUN-559601","price":270.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0651\/2253\/3479\/files\/GRUNF-5396.jpg?v=1792424808","url":"https:\/\/www.thehousesupplier.com\/products\/grundfos-559601-cast-iron-4-bolt-pump-flange-set-2-1-2-npt-pair","provider":"The House Supplier","version":"1.0","type":"link"}