This Canister clip was designed for the first model that Aquasafe came out with.
If you have a system where the D.I Canister is NOT SEE THROUGH then you have an older system and this is the clip you will need to connect your R.O membrane housing to your D.I Canister.
Also if you have the older system you will need the canister clip that is of different widths. This will be used to attach your D.I Canister to your final polishing filter. Please find the canister clip of different widths on the parts and accessories page.
Of course you could always just tape the different horizontal filters together, but that would not look very nice...