T-fitting With Easy Start HL018100AV

Hello Joel, Thank you for your inquiry. The T-fitting with easy start is a cold start valve that allows any air trapped over the pump piston when the compressor stops to vent off. The compressor pumping action and even back pressure from the tank will enable the pressure over the piston to increase. When it reaches the setting inside the cold start valve, that valve will close. We also recommend checking the pressure switch, the safety valve, and the check valve. We hope this helps and if you need help placing an order, customer service is open 7 days a week. Please feel free to give us a call. We look forward to hearing from you!