Do boats have toilets?
Similarly one may ask, do canal boats have toilets?
All canal boats have chemical toilets of one sort or another. Sea toilets, which discharge overboard, are not allowed on inland waterways. There are two basic types: Recirculation toilets - hold the treated waste either in a large sealed tank on board or in a smaller tank incorporated into the toilet unit.
Thereof, do small boats have toilets?
Spaces on a compact weekender are rarely straightforward, for some really small boats a simple bucket is your friend, but a flushable 'heads' is a welcome improvement. Every traditional boat toilet therefore functions by flushing (or dropping) the waste from the bowl into some form of holding tank.
As you know, the poop has to go somewhere. In most cases there will be a "Y" valve in the system. The "Y" valve determines if the poop goes into a tank to be dealt with later or gets pumped directly overboard.