I've seen fittings very similar to that (although they were 1" x 1" x 1/2" or 3/4") that were used for underground sprinkling systems.

Looks like a great minnow trap!


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3/4 to 1 1/4 ac pond LMB, SMB, PS, BG, RES, CC, YP, Bardello BG, (RBT & Blue Tilapia - seasonal).