It's summer. If you're going to build yourself a water-gun or a water pump, you'll need some check valves. These should work for you PVC building enthusiasts!
The most expensive parts of a water pump, or DIY Super Soaker, are usually the check valves. In this project, we're making some from scratch, for as little as $0.35 each.
Step 1: Watch the Video!
WARNING: The pressure tests and claims made on these check-valves is based solely on my personal experiences with the ones demonstrated in the video. Individual results may vary, and caution and care should be taken when loading the valves with high pressure. The risk of higher pressures is that the balls may be forced from the adaptor, shooting out like projectiles. High pressures may also cause the ball to lock up, preventing normal operation of the valve, or possibly even structural failure of the valve altogether. These valves are not made, or claimed, to be used in any heavy duty operations. Use of this content is at your own risk.