With a septic system, I don't want to use flushable liners. Is a diaper sprayer that much better or easier than just having a spatula by the toilet? How long do you let a dirty diaper sit in the pail?
Sounds kinda gross but I use the removable shower head to dislodge poop from the diapers... if you're not sickened by the thought, it is a cheaper option.
(edit) Oops, I just remembered you were referring to solid poops... disregard my post.