120* is not much hotter than a hot tub, so you can run your hand in the stream without pain. Also, 120* will not burn the lawn, or your hands while pulling hose. It is almost unnoticeable in the summer, and most welcome in the winter. In my opinion, heat has more of a positive effect for those of us that downstream.
In "season" (March through October) I was at least 2 houses/day (depending on size) and sometimes 3. Five, and sometimes six and seven days/week - and have never had a problem. I wash windows that have rotted sashes all the time, without water infiltration.
I have never used a chem pump on a house, other than the roof. Back in the day, I used a garden hose-end sprayer to apply my mix.
forgive me John for being ignorant to P/W terms, but by downstreaming you mean you carry the chemicals to the house ?
Why not have them on the trailer or truck ?
Oh, but then you would be drawing through lots of hose ?
I seems lile a chem pump might be simpler with a remote control valve that would switch to water when rinse is desired ?
Like I told Tim Asleton, I am almost being forced into house cleaning!
Believe it or not, we have cleaned houses with just our chem pumps and a garden hose ?
I bet a medium pressure diapraghm pump with remote control tanks would be neat ?
Oh, just thouight of something!
With 300 feet of hose, it would be a long time until you see the rinse water ?
Screw that!
Hey, what about a double hose, one for chemicals and one for water with a dual trigger gun ?
Is there such an animal ?
Pleasa, bear with me guys, and excuse my ignorance, I have only cleaned roofs all these years.