John Clean Country,
You are a sincere guy, but comparing PWNA to a swimming pool association is a stretch. Power washers, however join PWNA because they don't know any better. They mistakenly think it will make them better on their jobs. Like Dan said that's something one best learns on the job. Dan Flynn and others have even pointed out the vast library of knowledge available on this board. Anything you could possible want answered is a type stroke away.
PWNA has a convention 1 time a year at which the members get to hear guest speakers who are selling their wares. That's when the directors and others get to show off their merchandise to the nobbies (newbies) and try to flog it to them. It's not even like an automobile show with sexy babes. You do get to see Doc face to face, hold on there! That convention costs the members approximately 1 grand for travel, hotel and food, not to mention lost time from work. The rest of the year - nothing. Unless you count the sparcely attended meetings, like the one in New Jersey or the trips to get deck, kitchen, etc. certification. Another grand for travel, motel and food, not to mention the cost of the certificate and books. Consider PWNA what it is, a social buying club, you get to spend your money and mingle with people you may never see again. Think of it as Sam's Club without the discounts.
Save your money - invest in hose!