Black tank flush water leak?

[Darin]

We have discovered that the vacuum breaker/check valve under the bathroom sink in our 29RKS leaks when the water to the black tank flush is turned off. Has anyone else ever experienced this? I looked up the valve on the internet and discovered that it is common for it to leak and a lot of people replace it with a brass version. It is also a pricey little thing at $60+ . I called my dealer today and made an appointment to have it repaired. I just hope the dealer will install the upgraded version and not another one of the faulty valves.

[Hohenwald48]

I think just about everybody has had this same problem at on time or another.

[TCNashville]

We still have our original valve after 3 years. [knock on wood] I carry a spare that I ordered off amazon for around $35 [same valve] to replace it after it's eventual demise. If anyone has a link for a better replacement please post it.

[Darin]

Since this is our first trailer with a black tank flush system, I had no idea that this was going to be a problem. Luckily, ours only leaked a little bit when the pressure was turned off and didn't cause any water damage on our brand new trailer. I did find this brass replacement on Amazon (see link). Does anyone have any experience with this valve?
Amazon.com: Cash Acme 17383-0000 V-101 1/2-Inch Brass Anti-Siphon Vacuum Breaker: Home Improvement_

[ctbailey]

Man, the vaccim breaker for the black tank flush on the 32 BHDS is behind a screwed-in panel. I have no idea if mine leaks. I suppose when I go to winterize I'll find either no problems or a lot of staining.