*PLUMBERSSTOCK EXPERT* responded:
Thank you for your interest in the Roebic K-77! If I understand your question correctly, you can use this Septic Tank Root Killer in your septic tank with a drainfield or a cesspool with a seepage pit. Just follow the directions and your septic system will be cleared in 2 days or up to 2 weeks, depending on how severely clogged your lines are and where the roots are occurring. We recommend re-applying twice in a year to maintain the effectiveness. Please refer to the product info sheet if you have more questions. Always remember to click Add to Cart to confirm your order, enter your zipcode and you’ll be all set! For availability inquiries, or to better understand lead and ship times, please contact one of our knowledgeable customer service representatives @ 435-868-4020 or through e-mail @ firstname.lastname@example.org.