Newbie here - not a Toyota motorhome owner - yet.
(But looking for a Sunrader - currently own a 1975 American Clipper - restored - almost cherry - but gas prices have me ready to switch - and soon)
Anyways - water pooling on roof.
Clipper have the same issue - often in three different spots. Parking on an angle is good - but - you can't comfortably "use" the rig when it's on an angle, and many older fridge units need to be level when in use.
Here's my low tech, but effective solution:
1) Buy an 8-10 foot piece of clear plastic tubing, 3/16 inch inside diameter, 5/16 inch outside diameter, for every "pooling" zone on your roof (your local hardware store will have this stuff)
2) Cut one end of the tubing at an angle - say 45 degrees or less
3) Get a 2"x4" piece of wood 18 to 24 inches long for each piece of tubing
4) Get on the roof of your Toyota (or use a ladder) and lay the tubing down with the shorter side of your angle cut up, in the deepest part of where your water pools. Lay the 2x4 on top of it, so that the tubing runs the full length of the 2x4 and then....
5) Let the other 8 feet or so of the tubing hang over the side of the Toyota .
6) Gently siphon the water (by sucking a little on the end of the tube that is hanging of the side of the Clipper to start the siphon process) - and it will continue to drain the water off your roof until it is nearly gone.
Works great in rain to keep water off the low spots on your roof. With a litte experimentation, you'll find that if you run the tubing on the roof for 3 or 4 feet , and then let it hang down over the edge, often the siphoning process will start on its own - magic! (water physics/dynamics I don't quite understand - but it's amazing and nice to know when it's raining outside, no water is collecting on your roof)
Note: If you're in a spot where "stuff" falls on your roof (leaves, or other debris, etc.) - you may want to put a screen of sorts over the tubing to prevent it from clogging)
