Hey all Sean here the new guy! I began soft washing in the spring and for the last nine months I have been heavily researching the best ways to do soft washing with a pressure washer. I have been told by many that I cannot have a strong enough mix downstreaming to do roofs or hard flat surfaces. I recently upgraded from a 5 to an 8 gallon per minute machine. When I started with the 5gpm machine I was using a super sud sucker from Envirospec with the 2 to 3 gallon per minute nozzle. When I hooked up a 5.3 gallons per minute 12 V pump to force feed the downstream injector and I could empty a 5 gallon bucket of SH into the line in a matter of a few minutes.
I upgraded to an 8 gallon per minute machine and noticed when using my bypass that the 2 to 3 gallon per minute nozzle gave me a very small flow of soap no different than it was with the 5 gallon a minute machine (obviously I could have a 1000 gallon per minute machine and the size of that 2 to 3 gallon per minute nozzle would only let so much water through.)
Originally my thought was to use the two gun feature and each have their own down streamer so that we could soap twice as fast and then just switch to one gun and rinse at 8 gallons per minute. However that would defeat the purpose of being able to shoot up an extra 10 feet with my new bigger X jet. Yesterday I upgraded to the 5 to 8 gpm nozzle in my injector. I noticed a substantial increase in flow when bypass was turned to spray chem.
Nobody seems to know about adding a pump to force feed the injector. Is there something wrong with doing that? Now that I have 8 gallons per minute using the pump is a must to get enough soap on the wall with that bigger nozzle.
My plan to be able to do roofs and flat work would be to swap out the super sud sucker with the 5 to 8 gallon per minute nozzle for another one prefitted with a 2-3gpm nozzle and run it with the pump. This will give me substantial amounts of SH compared to the amount of water running through it. So to reiterate my question is how come no one seems to force feed or downstream injector or the pump to get a hotter mix?