The plastic elbow joint fitting is cracked under my galley sink. Does anybody know where I can obtain a substitute part or improvise a work around? No luck at West Marine or local hardware store.
Are you talking about the P-trap (from the drain)? If so it should be a standard plumbing item found at your local HD.
Not exactly sure what you are referring to but my 2000 Luhrs has all Pex type water lines. I had to cap the plastic water line going to my old ice maker location. I used Shark Bite or a similar product used for pex tubing which I found at my local hardware store.
https://www.homedepot.com/s/sharkbite?searchtype=text&NCNI-5 I think I found less expensive alternatives at my local Ace Hardware
Is this "elbow joint fitting" on the drain, the waterline or a cabinet support? Is it a Pex line or PVC? A pic would help.