Peggy, that's a great idea but
here's one more thing. My vent hose comes out the side of my holding tank and then goes almost straight up (I think) inside the hull and exits on the starboard side. So I'm guessing that whenever we heel to starboard all that nasty stuff in the tank is sloshing into the vent hose. So now you have me thinking that I should put a new vent opening in the top of the tank (I am pretty sure we have room between the tank and sole) and run the new larger diameter hose to the existing opening, enlarge the existing opening and then add the larger clamshell on the outside. If we do that then we would have to come up with a way to cap off the existing vent hose connection on the side of the tank.What do you think?
here's one more thing. My vent hose comes out the side of my holding tank and then goes almost straight up (I think) inside the hull and exits on the starboard side. So I'm guessing that whenever we heel to starboard all that nasty stuff in the tank is sloshing into the vent hose. So now you have me thinking that I should put a new vent opening in the top of the tank (I am pretty sure we have room between the tank and sole) and run the new larger diameter hose to the existing opening, enlarge the existing opening and then add the larger clamshell on the outside. If we do that then we would have to come up with a way to cap off the existing vent hose connection on the side of the tank.What do you think?