The Rheem XG75T06ST76U0 is a robust 75‑gallon tall natural gas water heater from the Performance High‑Demand lineup (76,000 BTU), built for large households with substantial hot water needs. It offers impressive performance with a first‑hour rating of up to 120 gallons and a recovery rate of approximately 75.8 GPH at a 90°F rise—ideal for homes with simultaneous showers or heavy appliance use. Designed for long-term reliability, it features a maintenance‑free burner system (no filter to clean), a low‑NOₓ eco-friendly burner, and a self-powered diagnostic gas control valve for easier service diagnostics. Safety and tank longevity are enhanced by a premium-grade anode rod, secure T&P relief valve, and compliance with low-lead standards. Built to withstand challenging environments, it’s certified for installation at high altitudes up to 7,700 ft (factory options extend to 10,200 ft) and comes with a 6‑year limited warranty on tank and parts plus 1‑year in-home labor coverage.