Upgrade your current PCP Fill adapter for Cascade Filling. Cascade Filling is when you connect more than one tank to your PCP fill system. Cascade filling allows you to get more useable air out of your tanks before you have to pay to refill them. You can cascade two, three, or more tanks together using our TMan tee block and our CascadeMan bottle adapters. If you own our Stikman PCP Fill Adapter, all you need to cascade fill with a 2nd. tank is one of our CascadeMan adapters. If you have a StikBoy, or anyone else’s PCP Fill Adapter that has a female quick connect you can upgrade. Just purchase a TMan, and a CascadeMan for each additional tank you want to connect.