Sewer backflow preventers are an essential part of your home's plumbing. Here's why you need one and how to test if yours is ...

BOB GRETSKY OWNS SPRINKLER ... THE SYSTEM. THEN HEAD OUTSIDE WITH YOUR SCREWDRIVER. OPEN THESE TWO LITTLE SCREWS WITH THE FLATHEAD SCREWDRIVER AND THAT’LL DRAIN EVERYTHING FROM THE BACKFLOW ...

Backflow preventer installation costs between ... They’re most common in homes with automatic irrigation systems and fire sprinkler systems.