thanks for the link got a 400 gph on the way one for me and 1 for my buddie and i ordered the in line flow meter with g 1/4 ends now i wount to find out what size the threades are on the compresor for the air in take and the 2 fittings on the heads that use them push on seal for water line i wount to convert them to brass fitting that the line slips on and i caN USE A HOSE CLAP any you guys on the thread size for the compresor where the air in line fitler screws on and where in take and out take of the water lines are looks like maby 1/4 pipe thread last pict has brass fiting going in to head any one know what size