Hi, I have a Wilkins 975XL RPZ backflow preventer that I installed in my basement with my system last fall. I never had a problem with it then, nor when I started it up this spring about a month ago. In the last few days, it has started a constant drip from the vent (relief valve?). How can I get this to stop, as i don't think it's normal for it to be doing that. I have a huge wet spot by my sump pump because of it, and have never had this before. Can you help?
