I cracked the elbow on the air check of my Autotrol 255. There us no part number for the elbow in the manual. A Google search for "Autotrol 255 air check elbow" doesn't show anything like what I have. It's just a plastic elbow that connects the air check to a 1/4" compression fitting to the brine tank. Is this possibly just a standard plumbing fitting and that's why it's not listed in the parts list? When I go to Lowes/Home Depot I get a headache looking at all the fittings lol. Thanks for any help.