When I install 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
|
Subject: NEW 12V Delavan Pump FAT BOY!! 
Mon Nov 17, 2008 3:38 pm
