Down streaming ratio

Christopher said:
I use a gallon measuring pitcher that shows ounces.

I fill up the pitcher so it is at the gallon mark and then with the machine running, put the injector hose into the pitcher and while watching your watch or using a stop watch, pull the gun trigger and timing it for a minute then letting go of the trigger, see how much was pulled out of the pitcher.

Multiply your gpm's times 128 to convert to ounces and then divide what was pulled from the pitcher and then multiply by 100 to see the percentage.
EX. 5.6gpm x 128 ounces = 704
65 ounces pulled by injector
65 divided by 704 x 100 = 9.23% is what the injector pulls

Hope this helps.
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What is your injector rated for? 10%?
 
CL Scott said:
I use straight clorox and elemonator as a surfactant. Not one issue. It doesn't make sense to buy 12% then mix water with it.
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Sure it does. You use half as much and its still stronger because its probably fresher.
 
"Red" said:
Can't calculate the actual ratios without knowing the pump GPM or DS %, (claimed or measured) but if your pump is 4GPM and DSer is 20%, your first mix is close to 14% SH hitting the surface and the second is example close to 8.5%. Obviously, these numbers will be different based on the actual equipment used.

Out of 5 gallons total, 1% SH is .05 gal in 4.95 gal of water. What formula are you using to come up with 1%?[/QUOTE?
If I was spraying straight 12.5% sh on a house with a 12 v pump that's 12.5% active sh. Put 12.5% in a bucket and add 40 percent more water cuts the active sh down to around around 8 percent active sh in the bucket. Spray that 8 percent through a ds injector that dilutes that down 8 to 10 times gets to about .8~1 percent active sh hitting the surface.
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Pat Norman said:
Out of 5 gallons total, 1% SH is .05 gal in 4.95 gal of water. What formula are you using to come up with 1%?
If I was spraying straight 12.5% sh on a house with a 12 v pump that's 12.5% active sh. Put 12.5% in a bucket and add 40 percent more water cuts the active sh down to around around 8 percent active sh in the bucket. Spray that 8 percent through a ds injector that dilutes that down 8 to 10 times gets to about .8~1 percent active sh hitting the surface.
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Sorry Pat, it doesn't work that way. Straight 12.5% hitting the surface is 100% (there's nothing but SH at this point). Add 40% water and your SH content is now @ 60%. The mix calculations are based on the volume not the strength of the SH. SH doesn't get weaker by diluting it with water, it just spreads it out much thinner so less is hitting any given spot at any given time.

Don't calculate the SH percentage anywhere in your formula, just think of it as stronger (12.5%) or weaker (10%). By your example, you're around 14% SH to the surface (with a 20% injector).

Your mix is probably right where it needs to be, you just have the numbers mixed up (pun intended).
 
You are correct that the ratio of the mix is about 8 to 10 parts water from the pressure washer plus 1 part whatever solution is being injected so that is 10 to 13 percent injected solution. But when you cut 12.5 percent sh diluted down with water as prescribed that is about 1 percent active chlorine hitting the surface.
 
"Red" said:
Then you're mixing a much lower concentration of SH with water. You're logic makes no sense.
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Let's say ABOUT 2 gallons of mix is needed for DS. Where quite a few guys would go with 1 1/2 gallons of 12%, and 2 .oz surfactanct (i.e. elemonator) and add about 1/2 gallon of water. I'll put 2 gallons of clorox 8.25 and elemonator - no water.
 
I don't know how to calculate SH percentages in a mix to determine the effectiveness. I use straight 10% SH with a surfactant with no issues.

Where do you get your Clorox and how much is it per gallon?
 
"Red" said:
What is your injector rated for? 10%?
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This was just an example, if I remember correctly my injector pulls about 13%, forgot the numbers as this was a couple years ago when I did a lot of testing and results changed with different orifice gun, different diameter of hose, different length of hose, different diameter of injector hose, different injectors that claimed the same ratio, etc.... many, many variables that can change the % of chemical you pull with your injector and system.

I need to tune the system again so I might be checking the ratios again to see what % I am pulling as I had a couple hoses blow out and I will be installing new hoses, the new hoses will not be as long as the old hoses, making some hose reel swaps also.
 
I found a container of Great Value bleach from Walmart from about a year ago that has 6% Sodium Hypochlorite in it so the stores all over probably started using the stronger bleach in the last year or so like 8% or 8.25% as they did not have that in any store around here 1.5 years ago as I looked all over the place for strong bleach as prices at the suppliers kept on going up and up.

I Washed a load of white clothes the other day with this year+ old bleach and it whitened the whites great like always so the store bought stuff does stay good for a long time where the commercial stuff will weaken sitting outside in the drums out in the sun. Maybe if I kept them inside a building or garage that was not hot, maybe it would last longer.
 
I know guys out there in Florida and the Carolinas can add water to their house wash mix but I have tried it numerous times with the 8gpm and the 5.6gpm machines and it does not clean the mold, and algae here, have to hit it many times (like 4 to 8 times) to clean the surfaces. This is why I don't add water to the house wash mix, it just does not work for some reason when I add water.

It might be that the SH I get from the supplier is old but it passes the finger test and washes good when no water is added to the mix. Maybe there is something that I am missing here. I had been using the Simple Cherry until I started using the Roof Snot, maybe the cherry was weakening the mix?
 
I have found that adding one cup of caustic soda beads to 4 gallons store bought household bleach 1 gallon water and my soaps and detergents downstreamed will clean just about anything I can clean with 12.5 diluted. I may have to apply twice but that is usually all. The beads really amp the cleaning power of the bleach up. Without the beads would definitely require multiple applications. Don't add more than a cup to a fiver. ..... more is not better.
 
"Red" said:
I don't know how to calculate SH percentages in a mix to determine the effectiveness. I use straight 10% SH with a surfactant with no issues.
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Here's how just in case you ever need to know and want to make different strengths of mix.

Say your using 12% and making 10 gallons of mix and want a 7% final strength.
Calculate 12(strength of bleach) x 7(the percentage strength you want) then divide by 10(gallons of mix your making) Final answer is 8.4 - so roughly 8.5 gallons of 12% and 1.5 gallons of water make a 7% final solution.
If your down streaming and your injector is rated at 10%. Then theoretically it would pull 10% of the 7% giving you a 0.7% cleaning strength TTW. But down streaming rates always changes with hose length, gun type, weather, how the stars are ligned up etc.
 
Johnson said:
Here's how just in case you ever need to know and want to make different strengths of mix.

Say your using 12% and making 10 gallons of mix and want a 7% final strength.
Calculate 12(strength of bleach) x 7(the percentage strength you want) then divide by 10(gallons of mix your making) Final answer is 8.4 - so roughly 8.5 gallons of 12% and 1.5 gallons of water make a 7% final solution.
If your down streaming and your injector is rated at 10%. Then theoretically it would pull 10% of the 7% giving you a 0.7% cleaning strength TTW. But down streaming rates always changes with hose length, gun type, weather, how the stars are ligned up etc.
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Exactly! The more you dilute the mix in the bucket plus how you you dilute the mix further by downstreaming dilutes the active chlorine around 1 pct +/- . You can control strength of final solution coming out the wand by different strengths of sh, different dilutions in your mix bucket and different orifice spray nozzles.
The injector, spray gun and reel and length of hose and length of wand are also factors.
 
"Red" said:
I don't know how to calculate SH percentages in a mix to determine the effectiveness. I use straight 10% SH with a surfactant with no issues.

Where do you get your Clorox and how much is it per gallon?
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I get my bleach from Costco. I figure it has the highest distribution rate than other stores, therefore I believe I'm getting the freshest batch. 8.25% Clorox @ $2.83 per gallon. Univar sells it @ $1.97 per gallon for 53 gallon drums - . I'm not at the level where I'm using that much in a week. So when I'm there (weekly, which means no extra time or gas) I grab a few 3 packs.

Why I'm not going to Univar - YET:

1. 28 miles away
2. I don't have a pickup truck
3. I don't have room on my trailer unless I remove my tank each trip
4. Not sure how long it takes for 12.5% to become 8.25%
5. I just started my company in June of this year - so my usage isn't that high YET
6. Clorox is getting the job done
 
Christopher said:
I found a container of Great Value bleach from Walmart from about a year ago that has 6% Sodium Hypochlorite in it so the stores all over probably started using the stronger bleach in the last year or so like 8% or 8.25% as they did not have that in any store around here 1.5 years ago as I looked all over the place for strong bleach as prices at the suppliers kept on going up and up.

I Washed a load of white clothes the other day with this year+ old bleach and it whitened the whites great like always so the store bought stuff does stay good for a long time where the commercial stuff will weaken sitting outside in the drums out in the sun. Maybe if I kept them inside a building or garage that was not hot, maybe it would last longer.
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Funny you say that Chris... Kroger store brand bleach is 8.25% - probably bottled at Clorox, just like the green bag of Kirkland coffee (Costco store brand) states right on the front of the bag "Roasted by Starbucks". I really started paying attention to this when I bought some walmart brand aquarium filter charcoal and read on the label "packaged and distributed by Marineland"

So... Who has a chart explain Sodium Hypochlorite depreciation according to time, tempature and conditions?
 
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