Rob Torcellini of Eastford, CT, built this valve for controlling water in his aquaponics system. I love all the clever mechanical tricks found inside!

This is a sequencing / indexing valve that I designed a couple of years ago. This uses a pinching mechanism to stop the flow of water. It is able to pass solids and keep operating if there is a clog elsewhere in the plumbing. I decided that it would be too expensive to develop and would show everyone how it works!