Paul Mueller Processor Tank-150 Gallon. Model: RHS. S/N: 1311036. Stainless steel. The RHS type Mueller milk cooler is designed for smaller quantities of milk. "Open" model. Minimum condensing unit capacity required for operation: 1.97 hp (66000 BTU/hr) @ 30 °F saturated suction temperature. Milk master tank agitator drive. Tank discharge: 2 in. threaded male, cooling system inlet/outlet: 3/8 in. copper pipe. Overall dimensions: 45 in. L x 50 in. W x 53 in. H.