Flush the drain lines with compressed air supply with this unique Jones Valve.Remove Clogging from upside & downside with the same valve. 1/4″ Hose connection, male flare with Schrader. 3/4″ Condensate line. Durable, Schedule 40 PVC Material. Attaches to CO2 or Nitrogen tanks. Smallest, and easiest to use of all available drain line valves. Most economical solution for HVAC & R drain lines.