Uniseals provide an excellent way to pass pipe through a tank wall without expensive bulkhead fittings. Available in a huge variety of sizes, these are perfect for aquaculture projects. We use them on many of our projects ourselves. Uniseals are sized to fit standard schedule 40 PVC pipe, so a 1" pipe requires a 1" uniseal. For larger pipe, we recomend grinding the end of the pipe to have a slight taper, and applying dish soap to the exterior of the pipe. This will significantly ease installation. Just be sure to completely rinse the area prior to contact with fish, as soap can be toxic.
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