As per my plumbing thread, I decided to try to increase the flow from my sump. My initial thought was to buy two Quiet One 4000 HH's or 5000's to replace the existing 3000's in use. Based on price, advice and a whim, I purchased a single 9000 instead.
After a few design changes and refinements, again based on great advice (Especially Andy) I finished the plumbing this morning. After waiting an appropriate amount of time for everything to setup, I made the final connections for the returns.
The flow seems to be pretty good. Definitely more than before, but not overpowering. I can even run a few accessories of the bypass manifold without dropping the flow below previous levels.
My only complaint is the sound of the pump. It hums quite loudly. I could not even hear the previous 3000's. With the 9000, I can hear the hum on the other side of the wall. I have tried moving it around a little without much difference. Holding it up so that it does not touch the sump bottom only stops a little amount of reverberation noise.
Not sure if there is anything I can do about this. Maybe create a short flex joint below the union to reduce sound in the pipe? I need to do some research and thinking.
2nd issue is surging in the drains. This occurred before the pump change, but is a little more prominent now. I may need to replace the stock drains and do a durso. Will research into this as well.
Even with these two issues, I am pretty satisfied with how it all came out.
Here is a snap of the return Y before installing under the tank.
This is the main return plumbing. Return to the tank has the most direct path for maximum flow. Immediately off camera right is the Y pictured above. Short, equal length flex hoses finish the connection to the tank.
The smaller 3/4" branch is for water changes and running accessories such as a GFO/Carbon unit etc. I can even have a drain open directly into the sump as seen here for feedings. Rather than actually shut off the pump, I will turn off the tank trunk and let the water divert for sump circulation. Still working on how to utilize this part of the setup. There are screw fittings after each valve, so changing usage should be very easy.
