Just curious...why the over 65' qualifier?
We have a pretty conventional setup with a holding tank, deck pumpout fitting, and an overboard pumpout. The toilets are macerating type which is the only type I would get. I took your question to be about the holding and processing system, not the number of heads for such a boat, but happy to share if that's also what you are asking. We do not have any sort of processing system, so sewage needs to be pumped out via the deck fitting, or pumped overboard in an allowed location.
BTW, I don't think there is anything special or different about the system because it's over 65' (20m) vs under.
Oh, and I have one toilet that can be valved for direct overboard discharge as a backup in case all else fails.
There may not be (but usually is) much of an engineering difference but it has to be a USCG approved Type II device for vessels over 65 feet (under 65 feet and you can use a Type I). I am not sure if vessels over 65 feet can just have a holding tank...I would think so, especially for some inland areas...but never looked into it.
I was referring to a simple holding tank arrangement which is what I have. Type III I think based on CG/EPA rules. In that case I'm not aware of any difference in requirements above vs below 20m.
OK, but Mike Rowe had to fix an incinolet in a segment of Dirty Jobs...In the 12 years I've had Incinolets, I've had to buy no parts except the liners.
Oh, and I have one toilet that can be valved for direct overboard discharge as a backup in case all else fails.
Neither of which is legal in US waters or the Great Lakes on both sides of the border. You must be in open ocean at least 3 miles from the nearest point on the whole US coastline to legally discharge (defined as "includes, but is not limited to, any spilling, leaking, pumping, pouring, emitting, emptying or dumping") raw sewage, defined as "human body wastes and the wastes from toilets and other receptacles intended to receive or retain body wastes."
You'll probably get away with it if you do it discretely and aren't unlucky enough catch the attention of a USCG person with a Barney Fife complex or an enviro-zealot. They're rare, but they do exist.
--Peggie
Anybody had any experience (good or bad) w/ Raritan's "Lectra-Scan" device advertised as being USCG-approved and allowing overboard discharge of human waste anywhere except in a designated No Discharge Zone?