New Sabre Silloutte Black Tank Flush leak

[kevnval]

2015 Sabre 312 RKDS....Hooked up the black tank flush for the first time this weekend.Water was going into the black tank ok...but it was also leaking out through the underbelly....through the opening that the black tank T handle protrudes through...not a drip...a pretty good stream of water. Leaked with the black tank valve opened or closed. Checked the back flow valve under the bathroom sink...not leaking there. I guess I'll have the dealer drop the underbelly to investigate...anyone have this problem?...comments?
Thanks...

[donanddona]

If you never had a leak prior to pulling the dump valve..... I would look at the oulet side of the valve and the discharge tubing. Sounds like they forgot to tighten up some screws....