Is this adapter worth it?

Yes if you are running 3 in. or 4 in. pipe from a standard catch basin. It is a $13.37 part that covers several basin sizes, so there is little reason to hunt for alternatives.

Will it fit my 12 in. catch basin?

It is listed for 9, 12, 18 and 24 in. catch basins and the 9, 12 and 18 in. low-profile adapters. Check that your basin outlet matches one of those sizes before ordering.

Can I bury it or leave it in the sun?

The HIPS is treated with UV inhibitors, so sunlight is not an immediate problem. For buried runs, backfill carefully so soil pressure does not crack the plastic.

The adapter itself. No pipe clamp, screws or sealant is listed, so plan on buying those separately if your setup needs them.

It stands 2-1/4 in. tall, which keeps the outlet low for shallow or low-profile installations.

Only one store prices it new, at $13.37 at Amazon as of November 3, 2026. With no competing listings, watch that price rather than waiting for a sale.

1243 Outlet Adapter for Catch Basin, Fits 3 in. & 4 in

Last price we saw

$13.37at Amazon, last seen Nov 3

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Our take on the 1243 Outlet Adapter for Catch Basin, Fits 3 in. & 4 in

The 1243 Outlet Adapter connects a catch basin outlet to 3 in. or 4 in. drain pipe. It is molded from high-impact polystyrene with UV inhibitors, so it holds up to sun exposure above ground. It fits 9, 12, 18 and 24 in. catch basins and the 9, 12 and 18 in. low-profile adapters, and stands 2-1/4 in. tall. At $13.37 at Amazon as of November 3, 2026, it is a low-cost part with only one store pricing it new.

Best forFinishing a catch basin drain line in 3 in. or 4 in. pipeReplacing a cracked or missing outlet adapterAbove-ground basins exposed to sunHomeowners installing a basin and drain themselves