{"product_id":"taco-td-12-combo","title":"Taco 1\/2\" Combo Horizontal Expansion Reservoir Drain Fitting","description":"\u003cdiv class=\"product-description-wrapper\" style=\"font-family: sans-serif; line-height: 1.6; color: #333; margin-bottom: 25px;\"\u003e\n  \u003cp style=\"margin-bottom: 16px;\"\u003e\n    The Taco Comfort Solutions 463-1 Combo Tank Fitting is a heavy-duty, commercial-grade cast bronze component designed to provide simplified fluid control and venting for conventional plain steel expansion reservoirs. This all-in-one plumbing specialty unit flawlessly integrates a secure isolation shut-off valve and a high-flow tank drain into a single solid-body design. By keeping free and entrained air trapped up inside the main compression cushion reservoir, it guarantees optimal system pressurization and protects hydronic heating configurations against wide-ranging thermal water-volume fluctuations.\n  \u003c\/p\u003e\n\n  \u003cp style=\"margin-bottom: 12px;\"\u003e\u003cstrong style=\"font-size: 15px; color: #111;\"\u003eKey Operational \u0026amp; Engineering Features:\u003c\/strong\u003e\u003c\/p\u003e\n  \n  \u003cul style=\"margin-top: 0; margin-bottom: 20px; padding-left: 20px;\"\u003e\n    \u003cli style=\"margin-bottom: 10px;\"\u003e\n      \u003cstrong\u003eSmart Dual-Action Handle Control:\u003c\/strong\u003e Engineered with a smart single-handle setup. Threading the internal needle-handle completely \"in tight\" opens the primary reservoir line to the boiler; backing the handle completely \"out tight\" securely seals the system loop off while opening the integrated drain pathway.\n    \u003c\/li\u003e\n    \u003cli style=\"margin-bottom: 10px;\"\u003e\n      \u003cstrong\u003eIncluded Rigid Air Tube Extensions:\u003c\/strong\u003e Shipped complete with one 6-inch and one 12-1\/4 inch copper air vent tube extension segment. These elements guide escaping micro-bubbles directly up into the core of the compression cell to maintain the cushion without reabsorption risks.\n    \u003c\/li\u003e\n    \u003cli style=\"margin-bottom: 10px;\"\u003e\n      \u003cstrong\u003eGravity Separation Architecture:\u003c\/strong\u003e The internal flow passages restrict thermal gravity-circulation currents between the system main and the tank body. This controls the tank temperature lower to prevent air from dissolving back into the system water.\n    \u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003cp style=\"margin-top: 16px; margin-bottom: 0;\"\u003e\n    \u003cstrong\u003eMaintenance Utility:\u003c\/strong\u003e Allows maintenance teams to easily drain water-logged compression tanks and charge them with a fresh fresh atmospheric air pocket during annual testing without having to drain down the rest of the building's main loop lines.\n  \u003c\/p\u003e\n\u003c\/div\u003e","brand":"Taco","offers":[{"title":"Default Title","offer_id":42910058020958,"sku":"TD-12-COMBO","price":310.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0663\/7151\/8558\/files\/Studio_profile_shot_of_a_Taco_463-1_bronze_1_2_inch_combination_expansion_tank_fitting_on_a_crisp_white_background_displaying_its_threaded_male_NPT_tank_connection_port_square_isolation_control_nut_and_side-mounted_water_drain_outlet_nozzle..jpg?v=1782130962","url":"https:\/\/nationalboilersupply.com\/products\/taco-td-12-combo","provider":"National Boiler Supply","version":"1.0","type":"link"}