Wife, kids and I really like this motorhome better than any other one we have owned (2000 Gulfstream 28' Class C on Chevy 454 one ton van chassis). One problem with it though, and this is apparently a high end feature, is that the bathroom sink drained into the black tank instead of the grey. This is supposed to give good hydration to flush the tank when you dump, but for us it made is so we had to dump twice every 24 hours. So I rerouted the bathroom sink drain to the grey tank via the kitchen sink drain. It wasn't easy though. Here is the access to the drains:
As you can see, there is a small opening and a long narrow passage to the left. The sink drain to black is just a bit left of the sink, but the kitchen sink drain is almost to the back wall on the far left.
Here is a shot of the finished work (all new work is white except the three way connector on the kitchen drain):
You can see the old sink drain pipe behind the white pipe that angles down. You also should be able to see where it connects to the sink drain pipe, but here is a closeup of that connection:
The rubber three way connector sure was a lot easier to install than trying to squeeze in a hard pipe with that strong smelling PVC adhesive.
Have done many small projects on this motorhome (you will with any motorhome to get it just how you like it) including moving the mudflaps, installing metal shields for the gas line where it has connections in the wheel well (what a bright idea for a blow out induced wheel well torch), replacing the line drains and water tank drain with larger valves, installing a tachometer, and many miscellaneous small tasks. It's fun, so far, but hopefully I will soon be able to move on to other things like changing the spark plugs in my F150 4.9L (have nearly 50K on platinums).

As you can see, there is a small opening and a long narrow passage to the left. The sink drain to black is just a bit left of the sink, but the kitchen sink drain is almost to the back wall on the far left.
Here is a shot of the finished work (all new work is white except the three way connector on the kitchen drain):

You can see the old sink drain pipe behind the white pipe that angles down. You also should be able to see where it connects to the sink drain pipe, but here is a closeup of that connection:

The rubber three way connector sure was a lot easier to install than trying to squeeze in a hard pipe with that strong smelling PVC adhesive.
Have done many small projects on this motorhome (you will with any motorhome to get it just how you like it) including moving the mudflaps, installing metal shields for the gas line where it has connections in the wheel well (what a bright idea for a blow out induced wheel well torch), replacing the line drains and water tank drain with larger valves, installing a tachometer, and many miscellaneous small tasks. It's fun, so far, but hopefully I will soon be able to move on to other things like changing the spark plugs in my F150 4.9L (have nearly 50K on platinums).