I normally run a very small truck mount. It has a 14 horsepower motor and a small 3 series blower. I recently got the chance to try and El Diablo for a whole month. ( My regular van is in the shop ) the vacuum that the El Diablo has blows my small TM out of the water. Don't get me wrong, I have been using my small TM, and I have accumulated about 50 five star Google reviews in the last 6 months. It gets the job done .Currently, my small machine is only pulling about 10 HG in Lift at the machine. The El Diablo polls closer to 15 HG even at a long hose run! I want to add a kunkle valve to the waste tank of my small TM. My mentor/supplier swears by the kunkle valve for improving and controlling lift on smaller machines. I guess my question is that will a kunkel valve actually allow me to pull closer to 15 HG of lift?