Shop All Savings
Appliances
Bath & Faucets
Blinds & Window Treatment
Building Materials
Lumber & Composites
Cleaning
Decor & Furniture
Lighting & Ceiling Fans
Doors & Windows
Electrical
Flooring & Area Rugs
Hardware
Heating & Cooling
Kitchen & Kitchenware
Lawn & Garden
Outdoor Living & Patio
Paint
Plumbing
Seasonal Decor
Smart Home
Storage & Organization
Tools
Automotive
Furniture
Gift Cards
Credit Cards
View All Home Services
Tool Rental
Benefits & Services For the Pro
Project Calculators
View All DIY Projects
Local Ad
Store Finder
Site Map
#1 Home Improvement Retailer
Select store
...
...
Cart
Select store
...
...
Shop All
Services
DIY
Me
Cart
Home
/
Plumbing
/
Valves
/
Check Valves
Check Valves
1 Results
Connection: Female Pipe Thread
Maximum Working Temperature (F): 180
Clear All
Sort by:
Top Sellers
Top Sellers
Most Popular
Price Low to High
Price High to Low
Top Rated Products
Get It Fast
In Stock at Store Today
Same-Day Delivery
Availability
Show Unavailable Products
Department
Plumbing
Valves
Check Valves
Connection
FIP x FIP
Sweat
Comp x Comp
Female Pipe Thread
IPS PE x IPS PE
Male Pipe Thread
+ View All
Maximum Working Temperature (F)
72
79
140
180
Expert Installation Available
See Low Price in Cart
(21)
Model# LF7U2-2 3/4
Watts
3/4 in. Lead-Free Brass FPT Dual Check Valve Backflow Preventer
Add to Cart
Compare
Installation Services
Plumbing Repair
We offer same-day emergency plumbing repair in most areas, and our service providers are local, licensed, insured and background checked for your peace of mind
Learn More