Normally Closed, 24V DC, 1/4 NPT Female, 1.4 Cv solenoid valve power supply
A 45W supply might need a reverse 1N400x diode across the coil pair at the source on the open flyback effect. The 12W coil is adequately driven.
Use twist pair or better shielded twisted pair (STP) with shield earth coupled to reduce flyback EMI.