I have been using a booster gas pump for the last month. I also have a electric booster pump from IPC Eagle. I must admit the gas pump has some really nice features. It starts with the first pull. It is not very loud as you do not need to run it at very high RPM to get good flow at the brush. The biggest plus for me is not having to drag extention cord out and find a plug. If you would like to upgrade your Hydrocart or Hydrotube to run multiple poles or you want to have a better flow this will be a good fit
http://http://shopwindowcleaner.com/water-fed-poles-systems/pumps/ipc-eagle-eco-boost-pump-module-gas.html
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