What does 4% look like if using an x-jet? (Which orifice?)
i used the x jet for those pics. refer to the proportioner chart to find out what tip you need since it’s different depending on your GPM
Never use a backpack sprayer for applying SH. If your backpack sprayer happens to leak this leaking SH will down your back and down your crack causing your skin to burn resulting in a lot of PAIN!
I don’t have any meaningful knowledge of xjet orifice sizing, plenty on here that use them.
By “SH” you mean hypochlorite de sodium ?
How long did you leave the product on before using the surface cleaner?
Hi Milko
You might have some issues on this forum due to our American way of abbreviating things and using jargon instead of technical terms. To top it off there are regional differences in language across the united states and canada.
There are some French Canadians on here I believe, maybe you can talk to them if there is an issue in translation.
HW - usually means house wash mix, it is a variable percentage of sodium hypochlorite used to clean most things. Usually the actual percentage of sodium hypochlorite that hits the home (for vinyl siding) is less than 1%. This is achieved by using a chemical injector sized to your unit. The percentage will vary from unit to unit, and from sodium hypochlorite percentage.
Example given: If you have a 4 gallon per minute machine (english units not metric which would be liters or litres) and you use sodium hypochlorite at 10 percent or sodium hypochlorite at 12.5 percent, you would get a very slight difference in percentages. To further elucidate this concept, if you have a 4 gallon per minute machine verses an 8 gallon per minute machine with the same percentage of sodium hypochlorite, the draw rate would be different and the percentage applied to the house/structure would be slightly different.
The way that the chemical injector works is, I believe, the venturi effect. But maybe one of the other members can jump in here and help you.
There is only one way to know what your actual percentage is, and that is to test your unit and determine it’s draw rate through the chemical injector. Then you would need to do some math to determine your percentages. Most people just estimate this number (we call it ballparking).
Good luck. I can’t imagine the difficulty you would have on the is forum with English as a second language. I’m from the United States and sometimes I have to look up definitions.
To answer the second part of your question, most of us spray the concrete while we are cleaning the home. We let it sit on the surface while washing (dwell time). Then when we are done washing the house we then wash the concrete. Some people will only spray it right before they wash it. The main thing is to pre wet concrete before cleaning it. Dwell time - the length of time the chemical sits on the surface - matters. Sodium hypochlorite is not instantaneous.
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