Along with what Mike asked,
I'll ask, what's your budget allow?
If two gal of pre-spray gets you through most jobs, the Multi-Sprayer is hard to beat for size, reliabilty and versitility.
We used one for years and years.
We still use one (battery model) for deos, protectants or when there's no power.
They're not cheap though.
for the last 4 years, the Hydroforce 3 gal 110vt electric sprayer is what we use 90% of the time
http://www.rotovaccorp.com/sprayers-hydroforce.html
reliable, EASY to mix powders in, and 3 gal capacity, as well as the ability to drop in gal jugs
you won't go wrong with either the Multi or the HF electric
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Brian, if you want to put spray down in a hurry, you'll need to change the jetting in the wand on the sprayers I mentioned.
Change the jet to 06 or 08 flow.
You'll get real close to 1 gpm
(which isn't far behind those unreliable in-line sprayers)
..L.T.A.
