4 Gallon Bladder Tank (12″ dia x 15″ h) for Sterisil Water Systems Works with: • Sterisil® AC+ Autoclave Water System • Sterisil® G4 Autoclave and Dental Water System • Sterisil® G5 Intelligent Autoclave & Dental Water Purification and Treatment System WATER STORAGE TANKS – 4 Gallon Tank Storage tank sizes may vary with customer specifications and needs. Note: tank sizes will vary depending on Stage 5 selection or pre-install requirements. As a default, the RO tank will be the larger of the two. Storage tanks must be mounted within 50 feet (15.2 meters) of the system to maintain optimal water pressure. A common location is under a sterilization center sink. Please note that the bladder tanks need to be replaced approximately every 2 years.