No...well, maybe
It depends on what you want to do. If the toilet is a self-contained system that can only flush into the tank, there are only two ways to empty it: pump it out or dump it at sea. To dump a tank--any tank, whether it's part of a self-contained system or separate--at sea, you'll need a pump and y-valve in the TANK discharge (pumpout) hose. However, if you install a separate toilet and holding tank, and if you have a choice between flushing into the tank or flushing directly overboard at sea, you only need a y-valve in the HEAD discharge hose that allows you choose between going into the tank or going out the thru-hull. Btw, you would not be able to do this if you install the Raritan CHT...it turns the toilet into a self-contained system. If you want to be able to do both, you'll need two y-valves...one in the head discharge However, I wouldn't put a portapotty, even a pumpable model, on a 32' boat. Go for either a decent sized holding tank, or better yet (unless you're in RI), install a Lectra/San (CG Certified Type I MSD that treats the waste to legal standards and discharges it overboard) instead of a holding tank.