Solberg STS-125C™ Inlet See Through Liquid Separator Vacuum Pump Air Filter, 1-1/4" FPT Inlet/Outlet, 13-3/8" Height, 7" Diameter, 60 SCFM, Made in the USA: Amazon.com: Industrial & Scientific
Ideal Vacuum | Intake Air Filter For Busch Pumps R5 0025/0040/0063/0100 B/C/E With 1 1/4 inch NPT Inlet. PN: CSL-848-125HC
Amazon.com - Vacuum Filter Replacement Vacuum Filters for Dirt Devil F2 Vacuum Filtration Part Reusable Air Filter 2Pcs -
Aftermarket Busch Vacuum 532.006 Air Filter Element