Replacement RO membrane for the Cirqua HP800 Reverse Osmosis System.  The HP800 system uses two of these membranes.  Over the years, two different membranes we supplied by the system manufacturer in new HP800 systems.   To determine which was used in your system remove a membrane from its housing and 1) measure its length, and 2) check for the presence of a hard central poly stem protruding about 1" from both ends of the body of the element.

OPTION A:  These membranes measure ~2.5" in diameter and 21" long, with a central hard poly stem protruding about an inch from both ends of the membrane body.  The specs on the replacement membrane are:

• Model:  0408
• Permeate Flow Rate: 400 gpd
• Stabilized Salt Rejection:  99.0%
• Test Pressure:  100 PSI
• Max. Operating Temperature: 113F
• Max. Operating Pressure: 600 PSI
• pH Range: 2 - 11
• Chlorine Tolerance:  0

OPTION B:  These membranes measure ~2.5" in diameter and 25" long, and are "flush cut" membranes, meaning that they do NOT have a central hard poly stem protruding from both ends of the membrane body.  These membranes are compatible replacements for the Nimbus brand membranes 100716, 100721, 100723 and the SG2525TH.  The specs on the replacement membrane are:

• Model:  0409
• Permeate Flow Rate: 400 gpd
• Stabilized Salt Rejection:  99.5%
• Test Pressure:  225 PSI
• Max. Operating Temperature: 113F
• Max. Operating Pressure: 600 PSI
• pH Range: 2 - 11
• Chlorine Tolerance:  0

Searching for other filters for your HP800?  Check out our Cirqua HP800 Filter Kit.  If you purchased your HP800 used, be aware these systems were originally installed with a water softener.  Many customers indicate used HP800's did not include the softener.  For assistance identifying an appropriate water softener for your Cirqua HP800, or for a sediment filter for installation upstream of the HP800, contact Buckeye!