Dual manafold pump questions

Ohio pressure wash

Ohio pressure wash

New member
I ran across a guy that acquired all the equipment from a pretty large fleet washing company. I've only briefly looked through one tractor trailer (stuffed full) of the equipment but ran across a couple of pumps that has me thinking about the rig I've been planning on building.

The pumps are GP sixplex dual manifold pumps, rated at 10 GPM @2000-2500 psi

We are so swamped with house washes that I've gone to a two man/two machine setup for speed. I've been looking real hard at a dual cold water machine dedicated to house washing. I wanted to eliminate the trailer, run it off one of the flatbeds and figured the dual machine would save space.

I can get these pumps dirt cheap so I was thinking of going with a new motor and building this out myself.

1.) Since we are soft washing houses, I was wondering if anyone has used this high volume/low pressure setup.
2.) We are using rinse tips for soap/rinse with a 5.5/3500 and 4 GPM/4000 now...could I downsize the rinse tips and come close to matching the water force with the lower PSI 10 GPM/2500 in dual?
3.) The series 48 GP frame for the 10 GPM/2500 is the same used on the 9 GPM/3500, could I buy the bigger bore manifolds and swap them out?
4) Does anyone know the min HP to drive a 10 GPM dual manifold pump?




Maximum Volume: 10.0 GPM
Maximum Discharge Pressure: 2500 PSI
Maximum Pump Speed: 1080 RPM
Maximum Inlet Pressure: 125 PSI
Bore: 22mm (.866")
Stroke: 16mm (.630")
Crankcase Oil Capacity: 54.0 oz.
Maximum Fluid Temperature: 165 F
Inlet Port Thread: 3/4" FPT
Discharge Port Thread: 3/8" FPT
Shaft Diameter: 32mm (1.26")
Weight: 61 lbs.
Dimensions: 16.1" x11.2" x7.9"
 
Hey Barry--I'll answer what I can in red. We have a little bit different of a set-up but maybe this can help ya some.

Ohio pressure wash said:
I ran across a guy that acquired all the equipment from a pretty large fleet washing company. I've only briefly looked through one tractor trailer (stuffed full) of the equipment but ran across a couple of pumps that has me thinking about the rig I've been planning on building.

The pumps are GP sixplex dual manifold pumps, rated at 10 GPM @2000-2500 psi

We are so swamped with house washes that I've gone to a two man/two machine setup for speed. I've been looking real hard at a dual cold water machine dedicated to house washing. I wanted to eliminate the trailer, run it off one of the flatbeds and figured the dual machine would save space.

I can get these pumps dirt cheap so I was thinking of going with a new motor and building this out myself.

1.) Since we are soft washing houses, I was wondering if anyone has used this high volume/low pressure setup. We rinse upwards to 20gpm from two different Powerwashers and as far as applying chemicals we have a dedicated 4gpm powerwashers and x-jets to apply chemical which is easy. I don't make a larger set-up for spraying house wash chemicals because of the fact to much can go airborn and all over the place and its harder to control then a smaller gpm machine. Of course our roof washing pump can put up 10gpm of pure Chlorine if we needed it or any house wash mixture you need but still for house washes and even condo's the smaller chemical gpm powerwasher with x-jet works the best. Hi velocity rinse,wash,rinse is Gold in your pocket
2.) We are using rinse tips for soap/rinse with a 5.5/3500 and 4 GPM/4000 now...could I downsize the rinse tips and come close to matching the water force with the lower PSI 10 GPM/2500 in dual? You can do most anything with the right tips and figuring
3.) The series 48 GP frame for the 10 GPM/2500 is the same used on the 9 GPM/3500, could I buy the bigger bore manifolds and swap them out?This is a great question for the Russ Johnson, Paul Kassandra types here
4) Does anyone know the min HP to drive a 10 GPM dual manifold pump? here's two formula's you can use to calculate the HP needed 1--(gpm x psi)1100 or(GPM xPSI)/1450 x 1.5 so for one 10 gpm at 2000 rpm lets say..you will need at least an 18 hp motor on according to formula #1 and aprox 21 HP on according to formula #2. If you want to have dual pumpers on there I would thing you would have to at least double the HP but once again you need the residency experts here such as PauL K. and Russ J. to give you a more exact answer.

Maximum Volume: 10.0 GPM
Maximum Discharge Pressure: 2500 PSI
Maximum Pump Speed: 1080 RPM
Maximum Inlet Pressure: 125 PSI
Bore: 22mm (.866")
Stroke: 16mm (.630")
Crankcase Oil Capacity: 54.0 oz.
Maximum Fluid Temperature: 165 F
Inlet Port Thread: 3/4" FPT
Discharge Port Thread: 3/8" FPT
Shaft Diameter: 32mm (1.26")
Weight: 61 lbs.
Dimensions: 16.1" x11.2" x7.9"
Click to expand...
Good luck
 
here's an easier to use formula..
(..you can use it backward as easily as forward.)

GPM x PSI x .0007 = HP continuous

continuous HP is what electric motors and most diesel engines are rated for,
and gas engines only give about 75% of what they are "rated", so..

10gpm x 2500psi x .0007 = 17.5
..and a 23hp = 17.25, so use 23 or better gas engine HP.

when you have an engine and pump, and you want to know how much pressure you can get..
use my formula backward..
23hp x.75 / .ooo7 / 10gpm = 2465 psi

About that T1631pump ..
my first "big" power-wash customer (way back in '85) was using those with a 30hp Wisconsin motor washing shake-shingle roofs..
I learned (and taught) them about dual-feeding pumps .. to make the seals more reliable.
But..
that model pump uses a tiny screw to hold in place the keeper-rings which attach the "opposing rods".
If (or when) it comes loose, the rods drop, the rings bash around, and EASILY damage expensive stuff in there.
That, along with being twice the price of a better pump anyway, makes it very UN-popular..
Leave'em that way..
.. Just say NO to the General twin-head pumps.

There are MANY reasons we use dual pumps over 7gpm.
To Learn quickly.. Follow a teacher.
 
Sirocco Jerry said:
here's an easier to use formula..
(..you can use it backward as easily as forward.)

GPM x PSI x .0007 = HP continuous

continuous HP is what electric motors and most diesel engines are rated for,
and gas engines only give about 75% of what they are "rated", so..

10gpm x 2500psi x .0007 = 17.5
..and a 23hp = 17.25, so use 23 or better gas engine HP.

when you have an engine and pump, and you want to know how much pressure you can get..
use my formula backward..
23hp x.75 / .ooo7 / 10gpm = 2465 psi

About that T1631pump ..
my first "big" power-wash customer (way back in '85) was using those with a 30hp Wisconsin motor washing shake-shingle roofs..
I learned (and taught) them about dual-feeding pumps .. to make the seals more reliable.
But..
that model pump uses a tiny screw to hold in place the keeper-rings which attach the "opposing rods".
If (or when) it comes loose, the rods drop, the rings bash around, and EASILY damage expensive stuff in there.
That, along with being twice the price of a better pump anyway, makes it very UN-popular..
Leave'em that way..
.. Just say NO to the General twin-head pumps.

There are MANY reasons we use dual pumps over 7gpm.
To Learn quickly.. Follow a teacher.
Click to expand...
Now that's some expert stuff right there. Thanks Jerry. I'm going to book mark your HP and pump formula for future references.

I'll start another post here about dual pumps so not to sabotage ohio's thread.
 
Barry, you'll need at the minimum 25 hp to run that pump at 2500 psi.
 
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