Oasis PLF4CM Compact On-A-Wall Cool Water Drinking Fountain, ADA, 4 GPH, Sandstone Delivers 4-gallons of chilled drinking water per hour Waterways are lead-free in materials and construction, Dial-A-Drink bubbler High-efficiency cooling tank and coil, Refrigerant R-134a Stainless steel top, welded heavy-gauge steel frame Complies with ANSI 117.1, ADA, ANSI/NSF 61, and NSF/ANSI 372, UL listed to US and Canadian standards