Pond Boss Forums POND CONSTRUCTION Building a dam Improperly installed siphon spillway

If it were me, I would cut that 12" outlet considerably, dig out around it a little and have it as the same height as the 6" pass through, with about 1' of 12" pipe exposed and cleaned well, I would then use purple primer to cover it completely and quickly and while primer is still wet cover it completely in medium dry glue, then take some sand and cover the glued area with sand and start to Press and rub the sand onto the pipe as the glue sets, the next day you will notice you have a 12" emery cloth that you can pour concrete against and get great adhesion and with a couple bags of concrete, trowel in a nice place for the water to flow away from the dam.