Review on 💧 Zurn Wilkins 1 975XL2 Backflow Preventer: Superior Protection for Water Systems by Ryan Olsen

Revain delivered it next day but was found to be leaking from the vent during installation. My plumber has to open all the spring loaded valves to check why it's leaking and he found that the washer in the safety valve (the one in that big round 6 bolt part at the bottom) wasn't installed properly and he also found dirt -like sand on the diaphragm to a brand new item. I was going to return it but got a notice from the city and I have to fix it in 3 days so I told my plumber to fix it.