Done with being an electrician...I became a plumber!  I now consider myself to be quite accomplished at PVC plumbing.  Many thanks to the guys at Corix Water Products.  I became quite a regular there!
  Here's a shot of the two closed loops. (Left and Right)  Each consists of a Dart pump connected to an OM-4 way.  The outlets from the 4-way deliver water back to the tank in such a way that the water will be "rolled" from the bottom/back across the bottom...up the front glass, then across the top toward the overflows.
  I'm very happy with the OM-4 ways.  They are completely silent, very well built and Paul is very helpful on the phone.  Even though the two loops are almost identical, I experienced some water hammer in the right loop.  A quick mod provided by Paul cleared it up easily.
