Very professional. He found the baffle was plugged, so pumping the tank alone wouldn't have solved the problem. He took care of the baffle and pumped the tank, and did it in record time. I highly recommend them.


Awesome folks. They tried to help me trouble shoot the problem before they sent someone over and cost me $. Appreciated their honesty, professionalism and customer service, 5 Stars.

Zan Dewar

Lilly's Septic has serviced my systems for over 13 years. Always prompt, always pleasant, and excellent service.

Gerald Lewis

I was very pleased with the service provided by Lilly's. As a buyer of a new house I was forced to pay for the pumping, inspection, and as built on our new house because the seller refused.
Lilly's was very understanding and did everything they could to make the process easy for me. The guys showed up on time even though they got lost and got straight to work. They dug fast and located my septic lid easily. They did all the work and didn't mind explaining all the processes to me. This is my first septic system.
They gave me tips on how to keep things operating correctly and were very helpful in general. When our lender needed to confirm the amount paid they responded timely so my closing wouldn't be delayed. They credit card charge made the actual charge different than the invoice and if you have ever dealt with an FHA loan you will know that all numbers have to match exactly. They wrote a letter of explanation and sent a revised invoice with no problem.
I will definitely be calling Lilly's for all my future septic needs.

Jessica B.

Contact Lilly’s Tank Septic Service in Maple Valley Today

Contact Lilly’s Septic Tank Service today for more information on the septic system and septic tank services available in Maple Valley and the surrounding areas. Our Maple Valley professionals here at Lilly’s Septic Tank Services will make sure to answer all your questions and to provide all the helpful information and resources you need. If you have questions or would like to book an appointment for septic services in Maple Valley, be sure give us a call. Trust the septic experts for your septic inspection, pumping, maintenance, or repair project to make sure everything is done right the first time.

Lilly’s Septic Tank Service provides quality, environmentally-conscious, and expert Septic Tank Services to the King's County area of Washington.