Here are some pics of the final WTE end cap closure. A single 3/16" O-ring is compressed between the aluminum endcap and the tube end by a strongback. The O-ring seals on 3 sides. The O-ring sealing flange is made from a 4" inside PVC connector. The endcap is epoxied to the sealing flange. I had to make up a fixture to hold the sealing flange to allow sanding the connector OD for a looser fit inside the tube. Very little compression of the O-ring is required; just enough to seal at shallow depth. Then water pressure takes over and further compresses the O-ring. Progress.
1 Like