Thetford Manuals & User Guides

Thetford Corporation is the world’s leading manufacturer of mobile sanitation products for the RV, marine, camping, and truck markets. With a history dating back to 1963, Thetford makes mobile living a more pleasant experience by offering high-quality, reliable, and durable products.

Their extensive catalog includes permanent and portable toilets, cassette toilets, absorption and compressor refrigerators, and a variety of specialized cleaning and maintenance chemicals designed to protect mobile equipment. Headquartered in Ann Arbor, Michigan, and Etten-Leur, Netherlands, Thetford operates globally to support outdoor enthusiasts.

• How do I winterize my Thetford RV toilet?

  To winterize, shut off the RV's water supply, drain the toilet bowl, and disconnect the water supply line. Add RV (potable) antifreeze and Thetford Toilet Seal Lubricant to the bowl to protect the seal.

• What cleaning products can I use on my Thetford toilet?

  Use non-abrasive cleaners such as Thetford Aqua-Clean. Do not use scouring powders, acids, or concentrated cleaners (like bleach) as they can damage plastic parts and rubber seals.

• Where can I find the model and serial number on my Thetford product?

  ID labels are typically located on the base of the toilet, inside the service door, or on the inner frame of the refrigerator.

• Why is my toilet blade stiff or difficult to operate?

  Stiffness is often caused by a dry seal or lime buildup. Apply Thetford Toilet Seal Lubricant to the blade and ball seal to restore smooth operation. Do not use petroleum-based lubricants like Vaseline.

• How does the Thetford waste-holding tank level indicator work?

  On most cassette models, the level indicator changes from green to red when the waste-holding tank is full or nearly full, indicating it needs to be emptied.