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Its kinda like watering the grass. As long as you're not over spraying off the roof all the time you should be able to to just hit the gun and do most of the section. If you're on/off with the gun it could start messing with the pump. If you have experience with pressure washing you should be able to keep the pump going and cover a good section of the roof.

Good Luck Tracey.  Nothing like the feeling after having cleaned your 1st roof.

El Flo Jo, Please make a video when you can. I would like to see your process. I too played with my Delavan Kit 5850, i purchased from Bob at pressuretek, last friday.

I used water also to see if I had the psi, distance and gpm.that comes from the pump.

One thing I did was test the gpm of the pump. I ran the pump for exactly one minute and I only filled the bucket up to 3.5 gallons. I was thinking it should have been 5 gallons in the bucket.

Then I thought about there was still water in the 200 ft hose and Bob informed me that my new battery was not fully charged. Which I fully charged last week. So I will test the gpm again this weekend

So I cut the hose down to 150ft. Figuring I should be able to reach back, front, rear and side of most home with at least 150 Ft. Plus I will have 50 extra that I can mend in if needed.

I also purchased my 91% ISO from Walmart last evening and the Ammonynx lo from Lori at pwp. I am getting ready to put the Apple sauce mixture together to do my own home first.

Will see how it goes.

Thanks everyone for your help.

-- Edited by JayCam on Thursday 29th of April 2010 12:23:00 PM

Hey Jay, you also have to remember that the 5gpm rating is when the outlet side is open. The longer your hose and the higher you are, the less gpm it will actually push. the 5850 will do about 3.5-4gpm and the fatboy will do about 5-6.

Scott makes a good point, the pumps are rated that way so you know what they can do but when you add 100's feet of hose, go up in elevation, the charge of the battery, size of battery cables, size orifice of spray nozzle, etc.... it all adds up in how many gpm's you will see on the roof through the hose.

I use a 5gpm Delavan for just transferring chemicals, I use 1/2" hose on the inlet and outlet and I get a good flow rate but when I tried using the hose on my reel (220' of 1/2") the flow slowed down a lot so the further you have to pump the less gpm's you will see.

Remember, these are only little 12 volt pumps with very little power and pressure so don't expect flow and pressure like on pressure washers where you can run 100's of feet of pressure hose and you don't really see a problem in the flow or pressure because you have thousands of psi but with the Delavan you only have less than 65 on most of them so the more hose you have, the less flow in gpm's you will see at the nozzle.

here is a trick you guys can use for you battery power you can get two deep cycle batteries and run them paralel by that i meen + to +. and - to - and hook your pump up as nomal this will deliver the same 12 volt power but it will last alot longer also I like to use 0/1 welding lead wire for my battery wires (I build lowriders and we use 8 or more batteries so I have found out what wire works good to transfer power). also what is IOS and what dose it do I have been looking trying not to ask but sofar i have not found any thing other then people use it in the mix.  thanks

-- Edited by Cadillac Dan on Tuesday 1st of June 2010 11:24:32 PM

Good to see you here Tim!

Glad I could help you out. Tim

Apple Roof Cleaning Tampa FL (813) 655-8777 wrote:

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Clear Shine wrote:

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Hey Tim! Its good to see ya on here too! You have been a big help over the years....

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I certified Tim on his second post, any objections
Welcome home Tim

 

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 I object!!!

Tim Should be made a Master Roof Cleaning Instructor.