Setting up a Fatboy & Accumulator Tank

Paul Freeman

New member
This is a first for me (I have zero experience with this equipment). I wanted to get it setup, or at least get the materials today, but I have a couple of questions.

• How close can the accumulator tank be to one side of the pump and how far away (max) can the chem tank be from the other side of the pump?

• I plan to use a 5/8” chem line for this setup but I was thinking about running 3/4” line from the tank to the pump. Will that be okay or should I use a bigger line on the input side of the pump? The thing is, if I go any bigger with that line it would have to be reduced at the pump anyway?

I’d appreciate any help I can get, to set this pump up right - the first time.

* This is (almost) a duplicate of a thread I started on another forum today, but apparently those folks are out making a living!

TIA
 

offdutyfireman

Active member
I use 1/2 hose, for what it is worth. 3/4 from the tank to the pump. It doesn't really matter how close or far away the accumulator is to the pump. It does need to be on the output side. I have mine set at 9psi running 200' of hose.
 

Paul Freeman

New member
:yikes: My tank came set at 50psi.

As far as the line goes, I'm basing my decision on several threads about that pump lasting longer when using a 5/8 chem line. I've also read that some guys are going to 3/4 line, but I'm not convenienced the 3/4 would make much difference because you still have the 5/8 bottleneck in and out of the pump. The 3/4 on the inlet side makes sense because there's no pressure involved, so it's just flood factor.
 

offdutyfireman

Active member
Tinker with the psi for what works best for your hose and length. The pump doesn't care what it is pumping thru. I have one fat boy that is 3 years old.
 

Paul Freeman

New member
I'm liking the sound of that 1/2 line more and more, especially since I can get it locally. If I go with that, will 40gpm nozzles be okay?

Thanks for the replies!
 

Guy Blackmon

Roundtable Host 2009
With the accumulator tank you can go as small as #5's and all the way up to #50's. Smaller nozzle size helps control chem runoff and excessive over-spray. Before the accumulator tank if you used a smaller nozzle than a #30 you would burn up the pump, same with smaller hose size.
 

Paul Freeman

New member
I got mine from Bob as well and I have to admit, he sounded a bit surprised when I told him I wanted to go with 5/8 fittings for the pump.

I'm glad I posted this thread here and I appreciate all the advice! I'm going to keep things simple and go with the half inch.
 

al9226

Member
I use 5/8 hose all the way including the accumulator and run 30's or 40's depending on the job. No problems yet.
 

A to Z Roofing

New member
It is like a bladder that fills with chemicals. That gets drawn from first and it empties, once that happens the pump will kick on like normal. Because of this the pump will cycle less, especially when using small nozzles and when only opening up your chemical line for a quick touch up spray for example.
 
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