Watts has been a trusted name in plumbing and water safety for decades. The LF007 double check valve backflow preventer is built for one specific job: keeping contaminated water from flowing backward into your clean supply. It handles low-hazard cross connections and continuous pressure systems, which covers most residential and light commercial setups.

The 1-inch lead-free bronze body is rugged and corrosion-resistant. It handles supply pressure up to 175 psi and water temperatures up to 180°F. You can install it horizontally or vertically, which gives you flexibility in tight mechanical rooms or crawl spaces. The quarter-turn bronze ball valve shut-offs are smooth and reliable, and the ball-type testcocks make annual testing straightforward without hassle.

This unit meets ASSE 1015 and AWWA C506 standards, so it’s code-compliant in most jurisdictions. The only real limitation is its size—at 7.4 inches long, it’s not compact. Make sure you have enough clearance before mounting. For a durable, no-nonsense backflow preventer that does exactly what it should, the LF007 is a solid choice.