USE WITH THE MAXLINE TUBING SYSTEM 3/4″ Tubing Inlet x 1/2″ Female NPT Outlet In wall tubing or surface mount tubing Includes: M81010 – Aluminum Block 50120 – Drain Valve 50136 – Brass Plug M8005 – 3/4″ Tubing Adaptor x 1/2″ NPT Adapter Or Optional Shutoff Valve Use Rapidair K6241 or K7241 or K9241 Quick Coupler