- Catalog
- Find A Branch
- KeepStock
- Help
- 1-800-GRAINGER
Register
Sign In
Sign In to access your account information.
Sign In Register for Grainger.comOrder Lookup
Track and check the status of an order.
Order LookupAll Products
Unrelated Links
Product Categories
- All Product Categories
- Abrasives
- Adhesives, Sealants and Tape
- Cleaning and Janitorial
- Electrical
- Electronics & Batteries
- Fasteners
- Fleet & Vehicle Maintenance
- Furnishings, Appliances & Hospitality
- HVAC and Refrigeration
- Hardware
- Hydraulics
- Lab Supplies
- Lighting
- Lubrication
- Machining
- Material Handling
- Motors
- Office Supplies
- Outdoor Equipment
- Packaging & Shipping
- Paints, Equipment and Supplies
- Pipe, Hose, Tube & Fittings
- Plumbing
- Pneumatics
- Power Transmission
- Pumps
- Raw Materials
- Reference and Learning Supplies
- Safety
- Security
- Test Instruments
- Tools
- Welding
Sign In
Sign In to access your account information.
Sign In Register for Grainger.comOrder Lookup
Track and check the status of an order.
Order Lookup
Dual Check Backflow Preventers
Available13 products
Dual-check backflow preventers are compact units with two inline check valves that prevent liquids from flowing in reverse and contaminating water supplies. They are used in applications ranging from municipal water systems and fire sprinkler systems to laboratory and processing equipment.
Brand
Lead Free Dual Check Backflow Preventers
Lead-free dual-check backflow preventers stop the reverse flow of contaminated water into potable water systems.
WATTS LF7
| Loading... | |||||
WATTS LFN9
| Loading... | |||||
APOLLO 4ALF-300
| Loading... | |||||
ZURN WILKINS 700XL
| Loading... | |||||
ZURN WILKINS 705
| Loading... | |||||
APOLLO 4ALF-400
| Loading... | |||||
APOLLO 4NLF-300
| Loading... | |||||
Carbonated Water Line Dual Check Backflow Preventers
Carbonated-water line dual-check backflow preventers keep contaminants such as carbon dioxide gas and carbonated water from flowing back into potable water supplies. They are commonly used in vending machines, beverage machines, and mixing systems in retail and commercial settings.
APOLLO 4C-100
| Loading... | |||||
WATTS 9BD
| Loading... | |||||
WATTS SD-2
| Loading... | |||||
WATTS SD-3
| Loading... | |||||
ZURN WILKINS 740
| Loading... | |||||
Fire Sprinkler System Dual Check Backflow Preventers
Fire sprinkler system dual-check backflow preventers protect against backsiphoning into water supplies. They install in residential fire sprinkler systems where backsiphoning could inadvertently drain the system.
WATTS LF07S
| Loading... | |||||
ZURN WILKINS 700XL
| Loading... | |||||