I did some math i cant seem to get how people use there blend manifold to be correct.
Take the popular GF valve for example:
When the GF valve is water 100% open and SH (12,5%) valve 100% open the mix will be 6,25%, 1:1 ratio.
Illustraded:
10 gal water bucket
10 gal SH 12,5% bucket
100% valve open water
100% valve open SH 12,5%
= 20 gal of 6,25% sh after coming out of pump.
But if the water is on 100% and SH valve 50% everyone says this vil ble 3,125% mix, half of 100%. But in 50% opening that means it will pull 10 gal of water and 5 gal of SH, but this will be a 2:1 ratio mix and that will be a mix of 4,15% SH?
And if the water is on 100% and SH valve on 25% opening everyone says it will be 1,5% SH MIX. But then this will pull 10 gal of water and 2,5 gal of SH 12,5% that would be a 4:1 ratio that will be 2,5% SH?
Is this correct? if so why are almost every video i see doing it wrong?
Forget spending time on what is what. After you use your manifold for a while you’ll figure out what setting cleans what. The percentage the valve is open is insignificant. When you have the valve set to X and it cleans a house, great. Then when you set it to Y it cleans a roof, great. Knowing what percent bleach you’re using isn’t important, just that it’s cleaning what it’s supposed to be cleaning.
I agree, but when starting out, still useful to try and get a ballpark idea (1%? 3%? 6%?) and start weak then add sh if needed. Wasn’t there a guy here awhile ago that said something like he put 4% on everything even vinyl 'cause it’s faster?
Yes, i use GF valves and for they to be 50% open . 2:1 ratio i need to set them to 115 degree opening. 25% opening - 4:1 ratio i have to set the valves to 85 degree opening
I agree that, especially starting out, knowing what you have is important. I can clean a house with 0.5% the same as 1.5%. If it’s not too bad, you won’t notice much difference between the two ratios. Knowing I’m only spraying 0.5%, I’m not so worried about watering down plants. You have to try to kill things with 0.5%, but can easily be done at 1.5%. Plus, using 1/3 the amount of SH to clean a house saves you money over time. Why use 9 gallons on a job that can get the same results in the same time, but only use 3? Even for me doing this part time, I’ll do 100+ houses a year. If I can save $20 a house just knowing what percentage I really need and using exactly that, it’s worth knowing.
With my soft wash setup , I carry 2 guns. One is setup at 19:1, the other at 10:1. When I roll up to a job, I can quickly look at the house and know which one I need. 90% of the time, I use 19:1 and I’ll use 2.5-3 gallons of hw mix for a normal 3500 sq. ft house. Sometimes I’ll use 10:1 just on the north side, then switch and use the other for the rest of the house. If a 30 second swap saves me 1-2 gallons, I’ll do it. I’m a mechanical engineer by trade, so I’m a calculating person that likes the be exact and as efficient as possible.
Agree, im the same. have been batch mixing for a year so i know exacly what % SH i want and need for different surface. I am located in Norway and here SH can cost up to 10 dollar per liter. 1 liter is the same as 0,26 GAL so its pretty expensive here
