Thank you for your interest in Septic Scrub(TM) drainfield flow restorer. Here are the answers to
your questions. Septic Scrub generally does not work effectively if the lines are full of water. The anaerobic part of the biomass is generally about
2-6 inches around the laterals. The product needs to flow to this area in order to be effective. If you have a period when the system is little used and
the lines have a chance to at least partially empty, you might get some results. If you can start to get flow through the system, then the next additions can
have a chance to work their way out into the drainfield. This is a more risky method however. We have good results in restoring fields. I cannot guarantee that the product will restore any particular field. What I can know is that it will
react with anaerobic bacteria products, release oxygen, give some percolation effects, and help the system become aerobic again. What I cannot know is
whether this is your system's problem. It is the problem with most systems. The other option would be to have your lines pumped. Because of the volume and flooding of the drainfield, this water is probably not septic in nature. 

In your particular situation, you can add the product into the pump chamber. I suggest that you add the product when the chamber is empty, and then add enough water to trigger the pump discharge. I would suggest that you add two bottles at a time in order to have as a high a concentration of Septic Scrub as possible. Do you have any access to the top of the mound? This could also be a way of adding the product. Even better would be if you have access to individual laterals. We could then treat the laterals individually.

You want the product to get into your original laterals if possible. Do you have any way of blocking the last lateral you put in? It is probably in the best shape and needs the least treatment.

Please do not hesitate to call or e-mail if you have any