For some reason it seems there are supply chain issues with various DOT push to connect fittings (or compression for that matter)<br/>Fleetpride - none in stock<br/>Napa - none in stock<br/>ParkerStore - none stock; would have had to ship from out of state<br/>Grainger - order with 3 day ship to store. Paid $24 for a $6 part<br/><br/>Bag Riders - an air suspension company (think low rider) - a good...