Once you use P&C you will never look back. You don't need a fill tube because filling the system is easy if you have an Aquatube with an Aquajet.
- Turn system so that Aquatube faceplate is horizontal.
- Place about 1 meter of tubing so it fits over Aquajet. The other end goes to your favorite suck device: turkey baster, syringe, mouth, etc.
- Filll up Aquatube and start sucking.
- As fluid level goes down in Aquatube you keep filling it up with your choice of fluids.
- Keep filling till you get fluid in your Aquajet tubing.
- Turn pump (after putting faceplate back on) on till all bubbles are out.
- Enjoy!
G 1/8 and G 1/4 refer to British parallel pipe thread specifications. The bigger the pipe size the bigger tubing you can use. I use G 1/8 and never had any problems with it in the performance of my computers.