San-T-Flush System Will Not Work

We bought a new 2014 Toy Hauler in July with 2 black water tanks. After the first week I dumped both black water tanks. The front San-T-Flush worked fine. When I connected the water hose to the rear San-T-Flush nothing happened. I took it to the dealer and after 4 days of fixing warranty issues they said they would have to get a schematic from the factory before they could work on the San-T-Flush. After reading several forum post about the issue I checked under the rear bathroom sink and there was the San-T-flush check value. I found that it was installed backwards at the factory. Here it is the middle of October and I can finally use the San-T-Flush and not have to carry a water hose with a wan into the RV to Flush the rear tank. The other forum posts about this problem was back in 2011. I would think that by now the factory could get it right. After much reading I am finding this to be a common problem with the RV factories. :S

Steve Brown