Check Valves Configuration:1/8" NPT (M) to 1/8" NPT (F) (O.D. 14mm) whereas the manual configuration needs

whereas the manual configuration needs to be checked and drained by hand periodically

The VIAIR 280C Dual Pack is ideal for lighter air suspension systems

and it's ideal for new and experienced off-roaders looking for a fast and dependable unit that will not break the bank

increasing duty cycle and motor life

Check Valves Configuration:1/8" NPT (M) to 1/8" NPT (F) (O.D. 14mm) whereas the manual configuration needsCheck valves are one way pneumatic valves designed to be installed in the leader hose or exhaust port of the compressor. They keep the high air pressure away from the compressor head, preventing high amperage starts and extending the life of the compressor. *Torque spec for 1 8" NPT is 10 11 lb ft *Torque spec for 1 4" and 3 8" NPT is 12 15 lb ft