Originally Posted by themerryonion
which is more expensive in the short and long term?
I think this question depends on the size of the system and if you're going to hire someone else. For my boat, I think a standard head/holding system might be less but I'm still planning to get a composting head.
I just pulled my head out of the boat. Good thing I was planning to do it and didn't try using it. I discovered a 2" x 3" hole on the back side of the holding tank in a spot that could not have been inspected without the disassembly I just did.