Are your products safe for septic tanks? January 26, 2023 15:38 Updated Thank you for looking into Sheets Laundry Club. Our sheets are Septic Safe. Some of our biggest fans are full-time RVers! Related articles I have hard water. Can I use Sheets products? How do I remove sheet residue from my clothes? Are your products safe for grey water systems? Do your products have a shelf life or expiration date? What are the ingredients in your products?