Ok. Think I got it. Only other question: I have an andersen 4 way valve. Its a 13 torque 301 toy hauler. Does it matter what setting the valve is on (city, tank, sanitize/winterize, normal) during black tank rinse? Bear with me cause Im new. I have 2 white hoses for regular hookup and i have a grey one for use on the black tank flush. Now I just need to make sure there is some kind of backflow preventer. ill ask dealer.
By the way, ive already made the mistake of walking away and leaving the gate closed! I thought the port for the black tank flush was a fresh tank fill cause it looked just like my old trailers fresh fill (white knob) and i didnt have asny manuals for the rv. I let it go for a while and went into rv to see the toilet overflowing and it had been lifted from the floor. Someone said it was the pressure from the black tank expanding. I just had to reseat the toilet and clean up. The seal in the bowl does hold water and doesnt leak. i dont know why some say it would have overflowed on the roof. The good thing is the dealer that i bought it from had really cleaned the !@#$ out of it! You can take that literally or not. I mean it was clear as can be and no smell. He told me the previous owner only used it a couple times. I dont think they ever did #2 in it :) It still has plastic on the mattress , garage was never used, and everything is like new! I also made the mistake of leaving black gate open this last time we went camping cause we had full hookups. Im learning. Thanks for all the replies
