This is a video explaining the difference between the DDC1, DDC2, DDC3.1 DDC3.2, and MCP35X pump is. I hope to get my hands on a stock DDC2 pump along with a DDC3.25 pump so that every DDC pump is compared other than the DDC1VC which is the G5 model. If a DDC1VC comes along though I won't say no.
Please note that the video doesn't go into all of the different PCB board revisions throughout the pumps as it would be impossible to gather that much data without a ridiculous amount of pumps and work. The DDC3.25 (PMP-400) has the exact same impeller and o-ring as the MCP35X pump. Also, it seems that adding a tach to the DDC1 is possible. I will add additional information once I get my hand on it.
@MrGrandDragon
The DDC1 was sold as the very early MCP350's and the DDC2 was sold as the very early MCP355's. The DDC1 and DDC2 was later replaced with the DDC3.1 and DDC3.2 respectively.
zip1385 5 months ago
What are the MCP numbers for the DDC1 and DDC2. I know that the DDC 3.1 is MCP350 and DDC 3.2 is MCP355.
MrGrandDragon 5 months ago
@Intanius Yes you can. You just need to purchase the proper pcb board.
zip1385 8 months ago
@zip1385
can you mod a ddc-1(10w or is it 12w) into an 18w pump by changing the pcb
Intanius 8 months ago