sump help needed for newbie....

[mr_alberta]

Noise as in vibrational noise or noise as in bubbles being sucked into the pipe? You could put a tee on the outside just after the bulkhead (rather than an elbow like you said you had a couple posts up) with a PVC cap on one side. Drill a hole in the cap (start small, go larger as needed) until you get just the right amout of air in the pipe. That should help you cut down some of the noise. It would be like setting up a half-external durso.