The Roof Cleaning Institute Of America Training & Certification Forum
"Find A Certified Roof Cleaner Directory"

Here are some pics of it. I have to get the in/out fitting figured out...

Wilden has excellent customer support. This is an OLD M1 with the metal air valve, a retrofit kit is availiable to update to a non stalling air valve for this roof cleaning pump.
The metal parts are not in the wet path, and the pump is made out of virgin poly, so if you rinse it right away, it will last awhile. I bought a used one of these, it lasted for 3 jobs before it leaked all over, but who knows how old it was, paid 60.00 at a Pawn Shop for it !!!!!!!!!!!!!!!!
It paid for itself