Cobco Poppet Drains are low cost, maintence free, corrosion free, and won't silt in. They are ideal for replacement of 1" threaded drains in wheel roll sprinklers and center pivot sprinklers. They have been adapted for use with "Chemigation". The insert model can be assembled with many different PVC fittings to make several different valves, including air vents, vacuum breakers, checkvalves, etc.

Cobco Hose Drain

1" Male Iron Pipe Thread X 3/4" Male Garden Hose Thread

Normally assembled with 4 oz. spring. Used on supply side of check valves to drain any reverse seepage that may occur. Meets requirements for drains in "chemigation" check valves.

Cobco System Drain

1" Male Iron Pipe Thread Pivot and Wheel Roll Drain

Uses 1 1/2 lb. spring that closes at 3 P.S.I. operating pressure. Poppet
sits inside pipeline and is not subject to the problems of rubber
drains. Works well in L.E.P.A. pivots that require low operating
pressure. Will not corrode. Replaces drains in "Valley" pivots and
"Wade Rain" wheel rolls.

Cobco Insert Valves