Forget the X Jet, call Bob, get the Delevan 5850 set up.
I like the 5/8 hose version, but that is up to you.
Plenty use the 1/2 inch hose set up, and some even 3/8

NOT "going there" at the moment

I would rather have a Delevan chem pump with 1/4 inch hose then try and x jet a roof

The question you asked is a common one, we have all been there before.
NOTHING beats a dedicated chem pump for roof cleaning, except maybe an "Apple Stick"
I know, I know, WHAT"S an "Apple Stick

?
Anyone KNOW
