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I will! DUAL FATBOYS is going to be DA BOMB!!!!!!

-- Edited by Mike Sullivan at 14:18, 2008-11-17

Wire size determines max amperage carried.
You can get by with a Shurflow with smaller wire size and length.
Delevans like large diameter wire, as short as possible.
RIP Delavan.

Call Bob @ www.pressuretek.com

He'll drop ship them to you directly from Delavan for $229.

Mike Sullivan wrote:

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Apple Roof Cleaning wrote:

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Wire size determines max amperage carried.
You can get by with a Shurflow with smaller wire size and length.
Delevans like large diameter wire, as short as possible.
RIP Delavan.

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Larry, now I see why your Delavan is dead. Like Chris says upgrade your wire and keep them short.

Use a separate good, strong car battery and 10 gauge wire.

I use a 770CCA/950CA car battery.

My 20hp pressure washer has an electric start w/voltage regulator/rectifier to keep the battery charged, so I can run my pressure washer and my 12V Delavans off the same battery.

 

-- Edited by Mike Sullivan at 11:54, 2008-11-18

 

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My Kid has a Ford Explorer with dual 15 inch woofers in a huge box.
Each wooofer has a 2000 watt amp on it!
He uses 4 gage wire, with dual batterys, and an oversized Alternator.
He also has huge Storage Capacitors on each Battery.
His lights STILL  go dim when the bass hits, LOL
Trollling Motors draw a lot of amps.
Maybe the answer is a HUGE deep Cycle Marine batter you charge every night ?
This is what I used to run the Dual Shurflo's that built Apple Roof Cleaning Tampa.
I recharged every night, well I forot to a few times, and it was still OK

 

Russ Spence wrote:

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Just ordered a "Fat Boy" Delavan, I will let you know, specs say it has a max psi of 150 so I will guess and say at 150 you will still get around 5 to 5.5 gpm

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Use some big azz wire Russ, and let us all know about that new roof cleaning pump ?

 

I still have a 5.3 gpm (delavan) and a 3.4 (shurflo) I am going to do some side by side comparisons with them against the fatboy

-- Edited by Russ Spence at 09:23, 2008-11-23

I never used a "Bandit" per say, but I have used all kinds of roller pumps over the years.
My experience with them for roof cleaning chemical is this.
They spray the roof cleaning chemical really good, when they are new.
Then, the roof cleaning chemical eats away at the inner chamber of the pump.
This causes an uneven "pitting/rusting" chemical reaction that then effects both flow and pressure.
This is because the rollers no longer "seal" up against the roller pumps inner chamber like they did before the roof cleaning chemical attacked it.
My best "Luck" with roller pumps was with the cheap Hypro cast iron with the rubber rollers.
It seems the rubber was better able to "seal" against the rusted, pitted chamber.
Plus, when the pump locked up, the rollers would not break as easily as the "Super Rollers.
The new fat Boy Delevan is  not a roller pump, it is a diapraghm pump.
It looks very interesting.
Time will tell us more things about it, as design flaws as to its roof cleaning use reveal themselves.

Confident Roof Cleaning wrote:

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The Fatboy is going to murder your other Delavan and Shurflo. The thing pumps like a champ. If I had to compare it, I would say it pumps about 90% what the Bandit does, and for a little 12v thats awesome.

The problem I had was it keeps blowing fuses, and the relay switch kept melting on the inside from getting to hot, and when that goes bad, the on demand function doesnt work and it explodes hoses. Get a couple of extra relay switches, and solder the grounding wire on, where it is on the one that comes with the pump.

Once you get it and get it all set up, please let me know what you use to hook it up. Wire gauge, fuse size, how far it is from the battery etc...Because I can't figure out why I blow the fuses.

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When I receive my FATBOYS I have decided to plumb them together but not on the same switch like I had my 5gpm 60psi Delavans.

They will be on separate switches and if I run them together, I will run them through two 3/4" hoses separately with two guys. The only time I will run them together through one hose is for filling up my chemical tanks with no nozzles, just open flow.

This way they will not be running at maximum pressure. If I keep them running at 60psi or less, they won't draw as much amps, saving them from overheating, blowing fuses, and killing the battery.

I will use large nozzles, #50 at least, #60 maybe, 1/4" barbs, or 3/8" barbs. I'll experiment to see which one gives me good distance w/o putting too much strain on the pump.

I ordered 8 gauge wire and 3/4" poly quick couplings to change out my 3/4" stainless steel hose reel swivel (which is getting rusty)

I can not see using any hose smaller than 3/4" for a pump that pushes this much volume, 1/2" or 5/8" would cause the pump to draw more amps and raise the pressure beyond 60psi, decreasing it's life.

Of course, this is all in theory, according to the performance chart. I won't know until I actually use them.

Performance of the NEW 12V Delavan 7gpm FATBOY pump

	7870/7970
PSI	GPM	Amps
10	7.0	11
20	6.81	12
40	5.96	13
60	4.98	17
80	3.96	21
100	2.55	25

-- Edited by Mike Sullivan at 19:52, 2008-11-25

I have the 3/4" blue Kuritec hose 200psi. How much PSI is the Red hose?