1.25" Waste Deck Fitting Adapter (273-125)
This pumpout adapter provides the most secure connection of pumpout hose to boat by using a quick clamp adapter (1.5" Male Quick Clamp X 1.25" Male NPT) and flat sealing washers. The male thread end of an adapter is screwed into the boat waste deck fitting and the pump out hose, equipped with a 1.5" quick clamp female adapter, is then clamped into place. Used on boats with waste deck fitting caps of 1.25" thread.
The gasket on the threaded part makes it airtight on the deck fitting! This is good for me for I use a hand pump. It stays primed even if you stop for a bit. Wish they made this in metal for I struggle with getting the threads on straight into the deck fitting without crossing them. The plastic is too soft a thread. Maybe put a metal connector and nipple on but shouldn't have too.