M7105 has been discontinued and replaced by M711084130. In order for the AQA 1500, 5600, 8400, 11200, and 14000 models to use the new M711084130 cartridge, the system has to be retrofitted first with this housing. If you have the AQA2500 model, see the M711072327 Housing Retro Kit. 
Retro Kit for AQA2500 - M7111072327 Retro Kit for AQA1500, AQA5600, AQA8400, AQA11200, and AQA14000 Manual AQA-Total Refill 
For well water applications, please contact our technical support staff.   
Specifications:

• Retrofits all the old style AQA Total systems except for model 2500
  
• Includes one new housing and one new cartridge
  
• The M711072328 used to be made by Tenergy Christ Water LLC Christ Americas (now made by BWT Austria and the new part # is BWT 084145)
  
• The M711072328 is the 1500 XP Changeover Set that includes the new style replacement housing with cartridge inserted in the housing
  
• Dimensions: 27" X 8" X 8"

CONSUMER NOTE: There is a $100 core charge for this item that will be refunded after it is returned. For any additional information, please call us @ 877-355-3339. 

Disclaimer: If you are using well water, please contact our technical support staff to help you determine if this system is right for your application.