Thetford THETFORD363-36662 FRESH WATER TANK SANITIZER MSRP: Price: 2099-12-31 $37.61 The Theford 363-36662 Fresh Water Tank Sanitizer is a must-have for any business or home with a water tank. This sanitizer kills 99.9% of all bacteria and viruses in water tanks, making it a safe and... Add to Cart Add to Cart