Step 7: Final assembly of system
1. Use a tubing cutter to make a length of hypodermic tubing about 1/2" long.
2. With a hemostat or similar pliers, hold the tubing section about the small hole and gently tap in about 1/8" deep using a small hammer.
3. With the stopper clamped back in the tooling, use a wrench to tighten down the hose-barb fitting.
4. With a scissors, cut a short (2") length of 1/8" tygon hose and slip it onto the hypo tubing.
5. Cut as long a section of 1/4" tygon hose for the draw tube as you will need. Might as well use a long section, as you can shorten it later. Slip it onto the 1/4" hose barb.
6. Place a soda bottle cap threaded side up on a block of wood and, with the small hammer, use a 7/8" punch to make as centered a hole as you can. Slip the cap over the tygon hoses.
7. Blow into the check-valve to see which way it opens. Insert one end into the 1/8" tubing so that make-up air will be able to enter the soda bottle.
8. Place a dab of caulk between the check-valve and the 1/4" hose. The caulk will help to keep the check-valve from falling off when you hit a bump.
9. Holding another section of 1/4" tygon up to your soda bottle, cut a pick-up tube that will just reach from the bottom hole in the stopper to the bottom. Cut the bottom of the tube at an angle. Stick your pickup-tube in the bottom of the stopper.
10. Fill a bottle with water. Place the assembly on top and tighten the threads. Pinching off the 1/4" hose, invert the bottle. Does it leak? If not, success!