Coxreels SP Series SLPL-4100 Inlet Valve Grommet the hose end should be

the hose end should be secured with a crimped ferrule

A simple solution is to add a breather filter in place of an open vent

or stubborn oil seals

3/8" Female or Male NPT

Coxreels SP Series SLPL-4100 Inlet Valve Grommet the hose end should beCoxreels SP Series SLPL 4100 Coxreels SP Series "Single Product Delivery" spring driven hose reels are intended to handle large hose diameters. The SP Series is best used in applications that require large volume delivery in low and medium pressures, such as fuel and water. For extra strength and rigidity, the sturdy box style frame has heavy duty steel cross supports to all four corners. Professional grade heavy duty steel construction Rolled edges &