Cheap Store brands can break down but sometimes it’s just because they’re very thin, 1 or 2 ply papers. … Kirkland Brand toilet paper (above) remained completely intact after sitting in water for 20 minutes but it dissolved fairly well after whirring it around with a spoon.
Furthermore, is Kirkland toilet paper OK for septic tanks?
Kirkland toilet paper is septic safe. It all comes down to how you care for your system, how you use your toilet paper, and whether luck is on your side or not.