Icon 437 22-1/2" x 18-1/2" x 6" Bottom Drain Holding Tank

I picked this up for a "poor man's Sealand" toilet mod on our RV. It was perfect for the job. This one has a toilet flange and a vent fitting on the top and a standard black tank drain fitting on the bottom. It has a textured top, internal bracing, and thick walls. There is no flex at all. It comes in black, but painting it white made it look much better. It's one of our best mods and was fairly simple.

Here are some pics. Bottom part has a 3" outlet.It even has 4 enforcements inside to strengthen it.

This holding tank is 2 inches wider than the shower base it is sold with. You can see the black holding tank under the white shower base and see how it is 2 inches bigger. How do you build around that. Called Amazon and they have no phone number for that company

Perfect for skoolie. I raised the floor six inches then dripped this in. I cut one hole through the floor of the bus for drainage and one through the ceiling for venting.Things to note:The vent hole sits way to close to the flange. If you have a hand flush on the same side as the vent hole, it will likely block the flush handle. This happened to me, so i 90° directly out of the vent hole to the back corner of the bathroom and then I 90° up through the ceiling.

It mounts flush with the floor and the toilet mounts directly to it