Followup
Update on my posts above ... fresh water on my '84CC38' exits the twin tanks through a threaded gray plastic QEST pipe. On one tank, the pipe broke off even with edge of the tank. To no avail, I first tried standard easy-outs to remove the piece remaining threaded in the aluminum tank: they were too small in diameter. Then, on my second trip to Home Depot, I found a tool in the plumbing section designed for removing similarly broken lawn sprinkler pipes. In sum, don't bother with the standard easy-out from the tool or hardware section; go directly to the plumbing section and ask for the tool you use to back out broken sprinkler pipes. It's actually a specifically designed easy-out, but you dont necessarily have to tell them that. Also, I didnt use the QEST product to replace the broken off pipe (something about fool me once ...); instead, I used regular old sprinkler pipes. They're less expensive and I have seen enough busted QEST for a lifetime. To protect the new installation, I installed a piece of 2" PVC (cut in half lengthwise) over the sprinkler pipe to bear the weight of the other (bilge and fresh water) hoses running perpendicular to the exit pipe.
