I am going to take your advise about the flexible tubing for the output of the pump(didn't even think of the vibration and potential noise. Thanks). I will post some more pics later tonight as I have glued the last few pieces and should be able to test with water tomorrow... the check valve is just to slow the flow if i loose power. i know they can fail from time to time so i will not rely just on that. plus I will make sure that there is enough extra space between the 3 sumps that will be hooked up together for the water from the main tank.