Detailed Description: No more crawling under the compressor tank to manually open the tank drain - simply install the Economatic Electric Drain - the drain can be adjusted to open and expel water from 1 to 60 minute intervals and the drain time (time the drain stays open draining water) can be adjusted from 1 to 30 seconds. Electric drain comes with a Y strainer which protects the drain by trapping any debris. Max working pressure is 200 psi. 1/4" NPT