“We moved into a new house in a damp area so we wanted to ensure that we had a backup sump that would engage if we lost power.I read all about this product online, watched a few installation videos, and was excited because it seemed like it would be a great fit and fairly easy to install myself, a pretty capable DIYer.But then reading the instructions, I realized that you are often required to install an RPZ backflow preventer (something that all of the videos I watched failed to do). This may depend on your municipality, but after researching plumbing code and literature, I learned that the backflow device that is included on this pump could theoretically allow the backflow of sump water into your freshwater system. This is why they recommend the RPZ backflow device, however those will run upwards of $300, effectively doubling the cost of the installation. And even with the RPZ in place I was suddenly uncomfortable about the idea of backflow into drinking water.So I returned it and got one of the battery backup systems. Yes, you have to replace the battery every 2-3 years but it just seemed like a better idea to keep the two systems completely separated.”
