Part # Description Volts 6 Ton 8 Ton 10 Ton 15 Ton 20 Ton 22 Ton 30 Ton 131853P1 VALVE H2O REG 3WAY 1" UB ALL 2 2 2 2       Standard Pressure Water or Glycol 131853P2 VALVE H2O REG 3WAY 1-1/4" UB ALL         2 2 2 Standard Pressure Water or Glycol 171818P4 VALVE H2O REG 3WAY 1" 350# ALL 2 2 2 2       High Pressure Water or Glycol P-311B VALVE H2O REG 3WAY 1" ALL         2 2 2 High Pressure Water or Glycol