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Our on-line store is open 24/7 and we ship Monday through Friday, excluding some holidays. Orders received for products without shipping restrictions on its product page will ship the same business day when received before 12:00 p.m. PST. Orders in high demand will have an estimated production time listed on its product page and will ship according to the date listed.
Aqua Max® holding tank treatment’s advanced enzyme powered formulas, all at the same time. Thetford’s beneficial probiotic treatments are Bronopol Free and Formaldehyde Free to provide campground friendly and California compliant solutions. Thetford’s new family of Aqua Max® holding tank treatments have been extensively researched and tested safe for all RV and marine toilets, holding tanks and septic systems.
We are a Seattle, WA based outdoor gear store with a mission to make climbing, backpacking, skiing & mountaineering accessible and enjoyable for everyone.
© 2026, Master Store
