If the water is coming from the part of the vacuum break that is a 90 deg elbow corner and not the fittings , drop part of the black plastic covering under the trailer and look in with a flashlight to where the hose goes and connects to the black tank .Mine was leaking at the corner of the vac break until I found that the hose was kinked at the black tank and causing to much back pressure . I added more hose and no more kink and no more leak .
take a look. (my fresh water hose at the tank was kinked also , had to fix that myself too. ).
It was a rainy few days at Algonquin Prov park...tarps kept us dry.
Wayne --Belle River (Windsor), Ontario
2013 Sunset Trail Reserve 25RB..
2015 White Chev Silverado 2500HD 4x4 (6.0 l gasser)
2003 Mountain Star 890SBRX Truck Camper