
I purchased the Valterra A01-0187VP Flexible Tank Wand 16,00. I didn't care for the one that spun. Overdose your black tank with 10 gallon of water loaded with Dawn the night before you use the wand. I slowly insert mine and spin it slowly all the way down the commode, and do the same coming out. All of this with the dump valve open. I repeat this several times and I can see down it my plumbing to the bottom of the tank with a mirror and it is always spotless. Don't be in a hurry spinning it or going in or out.