Ultima VI compatible replacement drop-in cartridge pre-filters, an RO membrane and an inline post-filter. See below for the compatible replacements. 

Replacment Pack Includes

• Sediment Pre-Filter (93023) - Replace Every 12 Months
• 2 Carbon Block Post-Filter (OMB934-5m) - Replace Every 12 Months
• GAC Post-Filter (CL10ROT33-BB) - Replace Every 12 Months