FYI --
The PMP-400 is a standalone DIY version of the pump used in Koolance PC4-1000, RP-1000, and TNK-400 products. 3/8" (10mm) ID, 18W, 9-13.2VDC, >6 L/min (1.8 GPM), >3m (10ft) head, with tach lead.
http://www.koolance.com/shop/product...roducts_id=334
The BONUS part is the pump speed control for any DDC pump.
The PCB-PWM10P control board allows manual speed adjustment of the Koolance TNK-400 pump and reservoir.
http://www.koolance.com/shop/product...roducts_id=324