FAIP Pressure Washer Pump 1/4 Turn Oil Cap - FA-57137400

The original FAIP part on many pumps was made from clear resin. They get brittle and break. Mine shot clear across my driveway. You WILL need the o-ring from the original part, or a new o-ring.

This fits my FAIP pump perfectly. I modeled this from the original part. You have to push in hard on the plug to seat the o-ring BEFORE twisting. Would probably survive ok in PLA, but I printed in PETG for higher temp resistance. As long as you don't let your machine run in bypass for a long time, it should hold up just fine.

Print with supports ON, with the part of the cap you turn with your fingers face down on the print bed.

You can also buy these pre-made in TPU over at pyr8moto.com