Quote Originally Posted by vulcZ View Post
Probably a silly question, but does Koolance make a reservoir like this for a single 655 pump?
The RP-452X2 ships with one pump "blocked", so you can use it that way just fine.

Quote Originally Posted by Phatboy69 View Post
Firstly just want to say great product!
Second..
I have recently put 2 of the 452x2's in my system and it does work with the new acrylic bypass installed with serial loop at the top. What is the difference between operation at top and bottom?
If you connect "P1 [IN]" and "P2 [OUT]" with the rear pipe connector on the bottom, then use the internal acrylic bypass inside the lower reservoir, you are running into the top reservoir first (blue path in diagram below), then into pump-2, through the rear connector, through the front acrylic piece, and lastly in/out of pump-1. However, if you place the pipe connector on top ("P1 [OUT]" and "P2 [IN]"), then you're running through that reservoir in between the pumps, so you would lose some performance.



Tim