Draw rate?

I might be digging through the garage for one of my pressure washers when I first started. Put together another another roof cleaning rig, has anyone tried this. I know we are not supposed to use pressure washers on the roof, I will be standing on the ground.
 
Hey Ted do you mix down your cleaning mix, if so, whats your concrete cleaning ratio/mix look like? It looks like using it with no proportioner is a pretty hot mix.

Ralph, it all depends upon how many GPMs your pump puts out.

Let's assume a 5 gallon pail, no proportioner, and a 4 GPM machine. Per the X-Jet chart the spray ratio would be 1.6 gallons of water per 1.0 gallons of cleaning solution. So, for a 5 gallon pail the total amount of liquid you'd be spraying would be:

(1.6 x 5) = 8 gallons water + 5 gallon pail = 13 gallons of total spray

Let's say you fill your 5 gallon pail with straight 12.5% SH. The chem strength coming out of the end of the X-Jet nozzle is:​

(12.5 x 5)/13 = 4.81%.

Another way to figure this is:

12.5%/(1.6 + 1.0) = 4.81%

So let's say you're washing a house and you only need a solution strength of around 2.0%. You'd pour 3 gallons of water into the pail and then add 2 gallons of 12.5%. The mixture strength is figured as:

(2 x 12.5)/13 = 1.92%

To answer your question about strength on concrete, it depends upon temperature (colder = hotter mix). Heavy moss = hotter mix.

I X-Jet chems with a 3.5 GPM machine (less runoff = less chem). So the very hottest I can apply at is:

12.5/2.4 = 5.21%

It's way faster to increase or decrease mix strength in the pail than it is by screwing around with the proportioners. That's why I don't use them.​
 
Ralph, it all depends upon how many GPMs your pump puts out.

Let's assume a 5 gallon pail, no proportioner, and a 4 GPM machine. Per the X-Jet chart the spray ratio would be 1.6 gallons of water per 1.0 gallons of cleaning solution. So, for a 5 gallon pail the total amount of liquid you'd be spraying would be:

(1.6 x 5) = 8 gallons water + 5 gallon pail = 13 gallons of total spray

Let's say you fill your 5 gallon pail with straight 12.5% SH. The chem strength coming out of the end of the X-Jet nozzle is:​

(12.5 x 5)/13 = 4.81%.

Another way to figure this is:

12.5%/(1.6 + 1.0) = 4.81%

So let's say you're washing a house and you only need a solution strength of around 2.0%. You'd pour 3 gallons of water into the pail and then add 2 gallons of 12.5%. The mixture strength is figured as:

(2 x 12.5)/13 = 1.92%

To answer your question about strength on concrete, it depends upon temperature (colder = hotter mix). Heavy moss = hotter mix.

I X-Jet chems with a 3.5 GPM machine (less runoff = less chem). So the very hottest I can apply at is:

12.5/2.4 = 5.21%

It's way faster to increase or decrease mix strength in the pail than it is by screwing around with the proportioners. That's why I don't use them.​

5.2% is still pretty hot, that's even enough to do a roof (40% I think) . But according to that chart 3.5 gpm is 1.4:1 That would be 8.92% wouldn't it?


Never mind I forgot to add them together 2.4! Duh.
 
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5.2% is still pretty hot, that's even enough to do a roof (40% I think) . But according to that chart 3.5 gpm is 1.4:1 That would be 8.92% wouldn't it?

1.4 + 1.0 = 2.4

12.5/2.4 = 5.2%

With 10% SH It'd Be:

10.0/2.4 = 4.2%

The X-Jet chart goes down to a 2.0 GPM machine and shows a ratio of 0.8-1.0. So about the hottest an X-Jet can go is:
0.8 + 1.0 = 1.8


12.5/1.8 = 6.94%​
 
1.4 + 1.0 = 2.4

12.5/2.4 = 5.2%

With 10% SH It'd Be:

10.0/2.4 = 4.2%

The X-Jet chart goes down to a 2.0 GPM machine and shows a ratio of 0.8-1.0. So about the hottest an X-Jet can go is:
0.8 + 1.0 = 1.8


12.5/1.8 = 6.94%​


Got it. Even with 8gpm and a 3:1 ratio. that's still a good mix. (for concrete) Throw a little caustic in there and it's EZ cleaning!
 
Okay, so I'm looking at the x-jet for an effective and efficient roof cleaning back up or additional setup. My goal is to pull the chemical from the trailer around 100'. I have never use an X-Jet but for about six months I have been down streaming at the gun. I will not go back to down streaming on the trailer the added benefit out weighs the cons. I would love to be able to X-Jet a roof. This would make for a simple trailer setup able to do any job with only a pressure washer.
 
Okay, so I'm looking at the x-jet for an effective and efficient roof cleaning back up or additional setup. My goal is to pull the chemical from the trailer around 100'. I have never use an X-Jet but for about six months I have been down streaming at the gun. I will not go back to down streaming on the trailer the added benefit out weighs the cons. I would love to be able to X-Jet a roof. This would make for a simple trailer setup able to do any job with only a pressure washer.

Just but the X-jet...... get 100' of hose... if it doesn't draw..... keep cutting down 10' sections until it does draw. I prefer my 50' of hose.....I don't have to move the bucket/tote as much.
 
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