We have had our 2014 27-5L (First AF for us) out for its second shake down trip and it is now in the dealers shop for repairs. Valves worked good on the first trip, but dumping after our second trip the galley gray tank valve failed to open I had installed the clear acrylic swivel extension so I could see the flow or lack of flow luckily. I put the unit back into storage waiting till local dealer could work on all the issues we found and during these travels I've noticed that the valve must have opened so now the dealer has the problem! I'll keep you posted as to my valve repair....they said they would need the unit two weeks for this and my other items to be fixed.