{"product_id":"weil-mclain-672619207646-aqua-plus-35-gallon-residential-indirect-fired-water-heater","title":"Weil-mclain 672619207646 Aqua Plus 35 Gallon Residential Indirect-fired Water Heater","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe Weil-McLain 672619207646 is a 35-gallon residential indirect-fired water heater from the Aqua Plus collection. It is built for homeowners and contractors who need reliable, high-output domestic hot water production paired with a hydronic boiler system. Indirect-fired water heaters do not have their own burner. Instead, they use heat from a boiler, circulating hot water through an internal heat exchanger to heat the stored domestic water. This makes them extremely efficient when matched with a high-efficiency boiler, and they typically outlast standard tank water heaters by a significant margin. The tank body and heat exchanger are both constructed from 316L stainless steel, a grade well known for its corrosion resistance and durability in demanding water conditions. The tank is fully passivated, which means no sacrificial anode rod is needed. This eliminates a common maintenance task and reduces the risk of failure due to corrosive water. The heat exchanger measures 1 inch in diameter and is designed to deliver a first hour rating of 223 gallons, making it suitable for households with moderate to high hot water demand. A digital thermostat provides precise temperature control for consistent performance. The unit includes a temperature and pressure relief valve for safe operation. Side connections simplify the plumbing rough-in, keeping the installation neat and straightforward. Adjustable feet allow the unit to sit level on uneven mechanical room floors. The tank stands 36.375 inches tall and measures 21.875 inches in diameter, fitting well in standard utility and mechanical spaces. Maximum working pressure is 150 psi, and the unit weighs 94 pounds. AHRI Certified under reference number 10358736, confirming independently verified performance ratings. Plumbers and HVAC technicians working on hydronic heating systems, boiler replacements, or indirect water heater upgrades will find this unit straightforward to specify and install.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e316L stainless steel tank and heat exchanger with full passivation — no anode rod required\u003c\/li\u003e\n\u003cli\u003eDigital thermostat for precise temperature control and optimal hot water performance\u003c\/li\u003e\n\u003cli\u003eSide connections and adjustable feet for fast, clean, and flexible installation\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eProduct Highlights\u003c\/h4\u003e\u003cp\u003eThe Weil-McLain Aqua Plus 672619207646 delivers high first-hour hot water output in a durable, low-maintenance stainless steel package. It is a strong choice for residential hydronic systems where reliability and installation simplicity matter.\u003c\/p\u003e\u003ch3\u003eProduct Information\u003c\/h3\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: WEIL-MCLAIN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 672619207646\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCollection\u003c\/strong\u003e: Aqua Plus\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWater Heater Type\u003c\/strong\u003e: Indirect Fired\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCapacity\u003c\/strong\u003e: 35 gallons\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFirst Hour Rating\u003c\/strong\u003e: 223 gallons\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: 316L Stainless Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Source\u003c\/strong\u003e: Indirect\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTank Height\u003c\/strong\u003e: 36.375 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTank Diameter\u003c\/strong\u003e: 21.875 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnd Connections\u003c\/strong\u003e: NPT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Pressure\u003c\/strong\u003e: 150 psi\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 94 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAHRI Certified\u003c\/strong\u003e: Yes, Reference Number 10358736\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"WEIL-MCLAIN","offers":[{"title":"Default Title","offer_id":43138425323614,"sku":"672619207646","price":2142.81,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0663\/7151\/8558\/files\/304883509.jpg?v=1786217258","url":"https:\/\/nationalboilersupply.com\/products\/weil-mclain-672619207646-aqua-plus-35-gallon-residential-indirect-fired-water-heater","provider":"National Boiler Supply","version":"1.0","type":"link"}