The valve is rated for a maximum inlet pressure of 1/2 PSI

Technicians should look for visible grooving

This 3/4 inch NPT valve features a rugged iron body construction and is factory set at 50 PSI to provide critical overpressure protection for commercial and residential boiler systems

which can lead to rapid seal failure and refrigerant loss

Lennox 72L70 Fan Blade 321042-401 The valve is rated forWhen you are onsite and dealing with a failed condenser fan, the Lennox 72L70 Fan Blade is the direct spec replacement required to restore factory level thermal rejection. This 18 inch diameter propeller is engineered for high static pressure applications within Lennox, Armstrong, and Ducane outdoor units. Featuring a 3 blade configuration with a 22 degree pitch, it is balanced to ensure smooth operation and reduced bearing wear on the motor. The 1 2