When you need a coupler to connect two 1¼" pool hoses together on a weekend out in the sticks and every hardware store is closed.... you print one :) This quick little print only takes about an hour with a 0.3mm layer height and a 60mm/sec print speed. This is a snug fit and since I'm just using this on the waste side, I didn't bother with clamps, but if you are using it on either the inlet or output of the pump, I'd recommend clamps around the hoses.

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Another Sketchup Model - Debunking the Myth that Sketchup is Useless in 3D Printing