Is Thankyou hand wash grey water & septic safe? Casey July 03, 2023 12:02 Yes! Our hand and body wash range is septic tank and grey water safe. Hooray! Related articles What happened to Thankyou Body Scrub? Is there a difference between hand and body wash? What sizes do the refills come in? Is your personal care range produced in Australia? What are the refills made from? Comments 0 comments Article is closed for comments.