Adapters for the Hoover Max Extract 60 Pressure Pro have been discontinued... which might explain why it is a “very difficult part to obtain” and “double the price” : r/betterCallSaul
Revitalize Your Carpets with the Hoover Max Extract 60 Pressure Pro
Grunkle Stan needs an adaptor for his Hoover MaxExtract Pressure-Pro, model 60! - YouTube
Hoover® MaxExtract® 60 Pressure Pro™ Carpet Cleaner | Canadian Tire
Hoover FH50220 Max Extract 60 Pressure Pro Carpet Cleaner for sale online | eBay
Amazon.com: Hoover Max Extract 60 Pressure Pro Carpet Deep Cleaner, FH50220 : Industrial & Scientific