Leaking Uniseals in home made 5g under current knock off - Any input?

[fuzzy]

If using 3in. pipe, then you use a 4in wholesaw for the 3in uniseal to fit.peace,fuzzy

 

[Bunz]

Properly used/seated Uniseals work... properly.

Anytime I've had a leak, it was because I took too much plastic off deburring or simply cut it 1/8" too big.

Bingo. Used 2" uniseals on 240 gallon hdpe bins when I was running a salt water coral business. Make sure there is a ton of resistance when trying to insert the pipe into the uniseal...............so much so that you need liquid soap to get the pipe in.