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Tell us about the pump ?

I have a delavan 5850 pump 12 volt, that I got from my local farm supply company.
They have been great to work with, if they don't have it, they will order it for me, and at prices similar to what I could get it for off the internet. I am using a BIG battery, 240 reserve minutes.
A local company builds them. Had it out to practice on my roof when I finished it, Shoots farther than I wanted it to. I had to get some different nozzles. I went with the two
100 gallon PCO tanks more for the appearance than the need for that much capacity,
But, I am glad I did. I did a roof last week for a friend, it was at a small building he owns,
the roof was not real dirty, but great practice. There was no water around to rinse the grass down with. I filled up the second tank with water, and was all set.
I built the ladder racks on the trailer, and installed a " deck" storage box on front to store all the
small stuff. Right now, I have 5/8" hose from dayco. Not very expensive, I think these will be the second purchase after some money comes in, The first will be to purchase another pump.
I went with brass nozzles and fittings. After reading alot on here, I decided to go that way instead of the stainless.