The tank can be upstream or downstream. If it is downstream, do avoid using your soap. It is possible to obtain soap from the tank , as normal. Be sure not to put bleach or something hard in there. If you place it there, it’s likely to take it into the tank, and. through the pump until the water hose. It will then be extremely powerful. It is best to use this method only for a downstream hose. If you’re using our own soap, it’s recommended to avoid use the harsh chemicals. m5oddj6vnf.