Where exactly did you mount the pump-out fitting? I couldn't quite tell from the photos....
On the top of the coaming on the port side at the head of the cockpit just aft of the cabin.
By opening or closing valves the head can either be pumped out with the macerator pump or by a facility that can pump your boat out. I've pumped water through it but haven't actually used it as we still like..
... using the other head with the double doodie bags. We take a 5 gallon bucket with a snap-on lid that are about $5.00 and put the bags in it and throw the whole thing in a dumpster at the end of the trip. The bucket keeps the guys picking up the trash from having to deal with them.
Two heads on the same 26 foot trailer boat might be a new thing .
Sumner
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1300 miles to The Bahamas and Back in the Mac...
Endeavour 37 Mods...
MacGregor 26-S Mods...http://purplesagetradingpost.com/sumner/endeavour-main/endeavour-index.html
Mac Trips to Utah, Idaho, Wyoming, Canada, Florida, Bahamas