5 GPM vs. 8 GPM

apple said:
I'm giving this a lot of thought lately. Our 8 gpm machines don't put out quite 3000 psi at the pump, so you know we're losing a lot by the time it gets to the end of the hose.

I've had it suggested to change pulleys to raise psi to 3600 and lower gpm to 6.8.

I'm interested in hearing anyones experiences on what to expect with the lower gpm.
Click to expand...


Chris, what size engine do you have on that 8gpm pump? Is the pump a General TSF2021?

If it is smaller than 20hp, it might not have the power for more psi, I have the cold water Pressure Pro 8gpm at 3000psi and it does put out 3000psi at the pump with the 20hp Honda engine.

The 8gpm sure is nice for house washing and cleaning large areas of concrete.

If you are losing too much pressure when cleaning concrete you might try the 1/2" hose, you lose a lot less pressure with it.
 
Just an FYI. I talked to Russ about the Y and he said that you will want to run a 1/2" hose to hand the GPM's for maybe the first 100' of hose and that you could end it with a 3/8 hose for added maneuverability without too much loss in GPM's. I'm digging it. Gonna scoop up a 30" mosmatic for cheap from a landscaper that I know that is running it with only 4gpm's (he says he hates it). Gonna up my concrete game.

While I'm on the subject of Russ Johnson..... He's the man! Yesterday I ordered some Roof Snot online then called to get an estimate on when it would get to me. Stressing getting it on time for a job this upcoming Tuesday. I caught Russ while he was on service calls and was kinda bummed that it wasn't going to make that days shipment, but hey that's the way it goes. At 5:30pm I get a call from Russ. He says that he could tell I was kind of bummed so he went back to the shop, packages some roof snot and drops it at the UPS store for me. What! For Real! This guy is out of control! That's the best customer service EVER! That's the kind of customer service that I try to give to my customers and it was dang nice to have karma come back to me when I needed it to.

Lee Rivenbark
Pro Pressure Washing
www.ProPressureWashing.com
888-998-PROS

Hampstead, NC
 
Guy Blackmon said:
Hey Lee, anytime you want to chew the fat give me a holler, I'll be at ICE today, I'm in Wilmington a few times a month.
Click to expand...

Hey thanks Guy. Looking forward to it. Let me know when your this way again. I'll PM you my cell#. But ICE... they sure are pricey. I do have to say that the guys in their service department know what they are doing though.

Lee Rivenbark
Pro Pressure Washing
www.ProPressureWashing.com
888-998-PROS

Hampstead, NC
 
Josh to add to Guys great advice when you see something like that again mix a strong mix of sh.When you mix the sh mix it 50/50 through a roof sprayer or a pump up sprayer and add 2 full cups of soduim hydroxide beads to just say a 20 gallon mix and when you apply this stuff it will should turn the mold a very distinct color like a butter color thats when you know you have your mix strong enough.Great job and very smart thing to do to rent a machine cudos very good.
 
Hi I'm new to the forum, and looking to move to Omaha and expand into this industry.
I am in the market for a system and am having this decision to make, and it is not an easy one. I have a Ford E150 6 cylinder van with a truckmounted carpet cleaning system in it already, so I am limited to the size trailer and water tank I can tow. I am looking at the pressure pros either with or without the trailer setup with 200 Gallon tank, 7 GPM 4000 PSI or 5.5 GPM 3500 PSI :
http://www.pressurewashsupplies.com...l_Engines_Options_To_Choose_From-376-103.html

A dealer I spoke with explained that reducing the GPM through bypass and tip sizes can strain the pump and cause premature damage if done to much. I don't understand why they are built like this. My prochem carpet cleaner has a 1000 psi pump, and I run it about 500 PSI 95% of the time. Nobody cleans carpet at 1000 PSI so that's what it is made to do. I want a system that is flexible depending on the job, but also I don't pay for it with repairs to often.

Another issue is that with my limited towing capacity, I may not be able to keep up with water supply running 7-8 GPM. It should be a no brainer for me to go with the 5.5, but REALLY want 7-8 GPM. Sounds like Jerry with Bulldog Pro recommends running his 10 GPM systems at any GPM needed for the job. What is different about his setups?

I want a Hydrotek, but the pricing is out of my budget of max $8000 for complete setup. I don't like that there SS 12 volt line only goes to 5.5...WHY? In their product info they talk about an unloader that reduces pressure spikes. Is that a part I could modify a pressure pro brand with, or does pressure pro already have that feature and just doesn't talk about it?

Great forum here with a wealth of knowledge I have only begun to gain.

Greg Rodie
Blue Carpet & Tile Cleaning
bluecarpetcleaning.com
 
Blue Carpet said:
I want a Hydrotek, but the pricing is out of my budget of max $8000 for complete setup. I don't like that there SS 12 volt line only goes to 5.5...WHY?

Because the ADC Beckett burner is inadequate to heat any more water than that, and the SDC uses way more amperage than the average engine charging system can supply to it. So Hydro Tek uses a 120 volt AC burner and a 3,000 watt generator.

In their product info they talk about an unloader that reduces pressure spikes. Is that a part I could modify a pressure pro brand with, or does pressure pro already have that feature and just doesn't talk about it?

I can order Pressure Pros with the K7 unloader, if that's what you like.


Great forum here with a wealth of knowledge I have only begun to gain.

Greg Rodie
Blue Carpet & Tile Cleaning
bluecarpetcleaning.com
Click to expand...

Also, if you get a Hydro Tek 8 gpm, but only want to use 5 gpm, a quick nozzle change is all it takes.
 
Russ Johnson said:
Also, if you get a Hydro Tek 8 gpm, but only want to use 5 gpm, a quick nozzle change is all it takes.
Click to expand...

Hey Russ, I've been reading some of your posts. Does that apply also to the Pressure Pro...or does Hydrotek have a better system to allow that safely? Is it a better unloader, and could that part be added to pressure pro?
 
Blue Carpet said:
Hey Russ, I've been reading some of your posts. Does that apply also to the Pressure Pro...or does Hydrotek have a better system to allow that safely? Is it a better unloader, and could that part be added to pressure pro?
Click to expand...

Looks like Russ accidentally included his answers to your questions in the part where he quoted you. The unloader you are talking about on the Hydrotek is called a K7 unloader. You can get one on a Pressure Pro too. You would probably have to special order it that way though, which Russ said is not a problem.
 
JDhomeservices said:
Looks like Russ accidentally included his answers to your questions in the part where he quoted you. The unloader you are talking about on the Hydrotek is called a K7 unloader. You can get one on a Pressure Pro too. You would probably have to special order it that way though, which Russ said is not a problem.
Click to expand...

oops thanks! I also talked to Jerry and like him allot.
 
Blue Carpet said:
Hey Russ, I've been reading some of your posts. Does that apply also to the Pressure Pro...or does Hydrotek have a better system to allow that safely? Is it a better unloader, and could that part be added to pressure pro?
Click to expand...

The unloader is the difference. Hydro Tek uses the large green spring unloader, which regulates better than the standard trapped pressure unloader. One could be added to a Pressure Pro at an additional expense.

JDhomeservices said:
Looks like Russ accidentally included his answers to your questions in the part where he quoted you. The unloader you are talking about on the Hydrotek is called a K7 unloader. You can get one on a Pressure Pro too. You would probably have to special order it that way though, which Russ said is not a problem.
Click to expand...

They use the K7 on single output machines. You can't use nozzles to change the flow with a K7 without freaking it out.
 
Greg you have come to the right place to talk washers.The advice that the saleman was giving you on the hydrotek is not really accurate.The Big Kohlors used to power these machines have plenty of amperage for the 12 volt system if set up correctly.With the unloader working properly it should take care of any decrease in gpms created by a orifice drop with no problems,it will just bypass to the tank.Hope you get what you need.
 
You must log in or register to reply here.
Back
Top