XP is only different model currently available, DD and D-Tek both use an O-Ring type fitting.
The DD pumps impeller was designed around the TDX series CPU blocks by Dan himself, however it worked so well, we adapted it as our standard impeller.
I still do not fully understand why Dan's impellers are often more efficent then my typical designs, comes down to experience I guess.
It is always best to order from dealers, as we only have the direct sale offer to support our upgrade program, for a limited time.
-Just checked, D-Tek has no orders on production sheets, so I would guess they will not have stock for an extended time.
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