For full functionality of this site it is necessary to enable JavaScript.
Here are the
instructions how to enable JavaScript in your web browser
.
Search
When search results are available use up and down arrows to review and enter to select. Touch device users explore by touch.
Search
When search results are available use up and down arrows to review and enter to select. Touch device users explore by touch.
Login
Wish list
Questions? Call us @ 800-548-1234
Orders
Invoices
Bids & Quotes
Order Templates
My Account
Login/ Register
Search
When search results are available use up and down arrows to review and enter to select. Touch device users explore by touch.
Search
All Categories
Featured Products
Aeration
Air Filter Accessories
Air Filters, Paper
Air Filters, Poly & Felt
Air Filters, Wire
Airflow Testing
Blower Enclosures & Accessories
Blower Lubricants
Blower Packages
Blowers, MD
Blowers, Republic
Blowers, Roots
Blowers, Sutorbilt
Check Valves
Couplings & Inserts
Diffuser Accessories
Diffuser Membranes, Replacement
Diffusers, Disc
Diffusers, Tube
Filter Housings
Kasco® Teich-Aire Linear Pumps
Pond/Lagoon Aerators, Aspirating
Pond/Lagoon Aerators, Bottom
Pond/Lagoon Aerators, Display
Pond/Lagoon Aerators, Surface
Pressure Relief Valves
Sheaves & Bushings
Silencers, Chamber-Style
V-Belts
Bioaugmentation & Process Chemicals
Bioaugmentation Products
Foam Control
Grease & Odor Control
Pond Maintenance
Sludge Reduction
Chart & Data Recorders
ABB Kent Taylor Charts
Badger Charts & Pens
BIF Charts & Pens
Bristol Charts & Pens
Chessell Charts & Pens
Chessell Recorders
Data Loggers
Dickson Charts & Pens
Fischer & Porter Charts
Foxboro Charts
Honeywell Chart Recorders
Honeywell Charts
ISCO Strip Charts & Ribbon
Leupold & Stevens Charts & Pens
Miscellaneous Charts & Pens (including universal pens)
Partlow Charts & Pens
Partlow Recorders
Pressure Loggers & Accessories
Rustrak Charts
Videographic Recorders
Wallace & Tiernan Charts & Pens
Honeywell Chart Recorders
Chemical Feed
Blue-White Parts & Accessories
Blue-White Pumps
Calibration Cylinders
Chemical Feed Skid Systems
Chemicals, Miscellaneous
Chem-Tech Pumps & Parts
Chlorination & Dechlorination Chemicals & Equipment
Corporation Stops
Drum Handling & Accessories
Dry Chemical Feed Systems & Accessories
Fittings, Bulkhead
Fittings, Hose Barb
Fittings, PFA
Fittings, Polypropylene
Fittings, PVDF
Fittings, Stainless Steel
Gas Chemical Feed Accessories
Gas Chlorinators & Sulphonators
Gas Chlorine Emergency Kits & Safety Accessories
Grundfos Pumps & Parts
Hose Pumps & Accessories
Injection Quills & Nozzles
Jesco Pumps & Accessories
LMI Chemical Feed Pumps
LMI Parts & Accessories
LMI Repair Kits
Mazzei Injectors
Mec-O-Matic Pumps & Parts
Milton Roy Pumps & Parts
Neptune Pumps & Parts
On-Site Chemical Generators
Polymer Chemicals & Miscellaneous
Polymer Feed Systems & Replacement Parts
Pressure Relief & Back Pressure Valves
Pulsafeeder Chemical Feed Pumps
Pulsafeeder KOPkits (Repair Kits)
Pulsafeeder Parts & Accessories
Pulsation Dampeners
Pump Enclosures
Scales
Static Mixers
Stenner Pumps
Stenner Replacement Parts
Stenner Service kits & Tubing Assemblies
Tablet Feeders
Tubing
Ultraviolet Lamps, Quartz Sleeves, and Ballasts
Ultraviolet Systems
Vanton Pumps & Replacement Parts
Walchem Parts & Accessories
Walchem Pumps
Water Treatment Equipment
Collection Systems
Cable Machines
Cables for Cable Machines
Chain/Root Cutters
Chemicals/Bacteria for Pipe Cleaning
Cutters, Tools & Accessories for Cable Machines
Flat Sewer Tape & Accessories
Grease Control Products
Inflow Protection/Manhole Repair
Ladders
Manhole Lifters & Tools
Odor Control Products
Pipe Cleaning Pigs and Balls
Pipeline Flushers
Rodding
Seals & Berms
Sewer Camera Accessories
Sewer Cameras: Handheld
Sewer Cameras: Lateral
Sewer Cameras: Mainline
Sewer Cleaning/Jetter Hose
Sewer Jetter Accessories
Sewer Jetter Nozzles
Sewer Jetters: Portable
Sewer Jetters: Trailer
Smoke Testing
Stormwater Filtration
Stormwater Markers
Tracing Agents
Vacuum Trailers
Weather Monitoring Instruments
Electrical
Alarms-Horns & Lights
Alternators
Auto-Dialers
Batteries
Clamp Meters
Conduit, Junction Boxes & Receptacles
Contactors
Control Panels
Corrosion Control
Enclosures
Fuses
Generators, Portable
Generators, Towable
Infrared Thermometers
Loop/4-20 Calibrators
Motor Controllers & Starters
Motors: 3-Phase
Motors: Single-Phase
Multimeters
Panel Components
Phase Monitors
Power Cords
Power Monitors & Surge Protectors
Power Supplies
Relays
SCADA Systems
Switches
Time Meters
Timers
Voltage Detectors & Testers
Wire & Accessories
Filters & Strainers
Backwashing Filtration Systems
Basket Strainers
Filter Bags
Filter Cartridges
Filter Housing
Replacement Filter Press Belts
Reverse Osmosis Systems
Water Softeners
Y-Strainers
Flow Metering
Area Velocity Flow Meters
Curb Stops/Corp Stops
Doppler Flow Meters
Electromagnetic Flow Meters
Flow Switches
Flumes & Weirs
In-Line Flowmeters: Digital
In-Line Flowmeters: Rotometers
Insertion Flow Monitors/Flow Meters
Insertion Sensors
Installation Fittings & Mounting Accessories for Insertion Flow Meters
Meter Brass
Meter Flanges & Gaskets
Meter Reading Accessories
Meter Setters & Resetters
Meter/Curb Boxes
Open Channel Flow Meters
Propeller Water Meters
Transit Time Flow Meters
Water Meter Accessories & Tools
Water Meter Insulation/Freeze Protection
Water Meter Locks & Seals
Water Meters: Compound
Water Meters: Hot Water
Water Meters: Multijet (MJ)
Water Meters: Positive Displacement (PD)
Water Meters: Rebuilts
Water Meters: Turbine
Gauges
Differential Pressure Gauges
Digital Pressure Gauges
Gauge Accessories
General Purpose Pressure Gauges: 2; 2.5-inch
General Purpose Pressure Gauges: 3.5; 4 & 4.5-inch
Industrial Temperature Gauges
Liquid Filled Pressure Gauges: 2 & 2.5-inch
Liquid Filled Pressure Gauges: 4-inch
Pressure Gauges: Diaphragm Seal
Process Pressure Gauges: 4-1/2
Specialty Gauges
Staff Gauges/Sight Gauges
Water Level/Altitude, Water Test & Well Depth Gauges
General Purpose Pressure Gauges: 2 and 2.5-inch
Liquid Filled Pressure Gauges: 2 & 2.5-inch
Liquid Filled Pressure Gauges: 4-inch
Hose
Couplings & Gaskets
Discharge Hose: High Pressure
Discharge Hose: Regular Pressure
Fire Hose
Foot Valves, Strainers & Skimmers
Garden/Rubber Hose
GHT (Garden Hose) Fittings & Couplings
Hose Clamps & Repair
Hose Handling Accessories
Hose Hydrant Adapters
Nozzles & Shutoffs
Sprinklers
Suction Hose: All-Weather
Suction Hose: Kink-Resistant
Suction Hose: PVC
Suction Hose: Rubber Wire Reinforced
Hydrants
Backflow Prevention & Pressure Relief
Dry Hydrants
Flushing Diffusers
Flushing Hydrants & Accessories
Hydrant Extension Kits
Hydrant Flags & Markers
Hydrant Flow Testing & Measurement
Hydrant Gaskets & Caps
Hydrant Tools & Accessories
Hydrant Traffic Repair Kits
Yard Hydrants
Lab Instruments, Equipment & Supplies
Additional Lab Equipment
Additional Lab Supplies
Chlorine Testing
Cleaning and Sterilizing
Constant Temperature Equipment
Filters and Solids Testing
Glass and Plasticware
Lab Balances
Lab Chemicals and Reagents
Microbiology Testing
Multiparameter Testing
Nitrogen Testing
Oxygen Testing
pH, ISE & ORP Testing
Turbidity Testing
Additional Testing Parameters
Level & Pressure
Bubbler Compressors
Conductivity Control
Float Switches: Accessories
Float Switches: Mechanical
Float Switches: Mercury
Pressure Switches
Pressure Transmitters
Pump Controllers: Analog Input
Pump Controllers: Float Input
Radar Transmitters
Submersible Transmitters
Ultrasonic Transmitters
Water Level Meters/Loggers
Locating & Leak Detection
EMS Marker/Locator Systems
Ferromagnetic Locators
GPS Systems & Accessories
Leak Detectors
Locator Accessories
Marking Flags & Tape
Marking Paint & Crayons
Marking Posts
Metal Detectors & Magnetomatic Locators
Non-Metallic Pipe Locators
Pipe & Cable Locators
Smoke Testing
Tracing Agents
Maintenance
Adhesives & Sealants
Air Compressors & Accessories
Blowers, Sprayers & Accessories
Cleaners & Degreasers
Dehumidifiers & Fans
Filing Systems & Organizational Supplies
Flags & Flag Poles
Flashlights & Headlights
Floor Cleaning & Floor Mats
Grease & Oil Handling
Hand Cleaning
Hardware, Kits & Assortments
HVAC
Janitorial & Sanitary Supplies
Lightbulbs and Ballasts
Locks & Keys
Lubricants
Material Handling
Miscellaneous Maintenance
Paint & Coatings
Paint Accessories
Pest Control
Pesticides & Herbicides
Portable Lighting
Railing Systems
Rakes
Saws, Trimmers, Pruners & Accessories
Seasonal
Strike Midge Control
Strut Systems
Tape
Trash Receptacles & Litter Collection
Washing Equipment & Supplies
Welding Supplies
Office Supplies
Breakroom Supplies
Desktop Accessories
First Aid
Office Furniture & Large-Scale Storage
Organization
Paper & Accessories
Shipping Supplies
Wall Decor
Writing Instruments
Pipe
Black Malleable Pipe Fittings
Brass Pipe Fittings
Compression Couplings
Copper Pipe Fittings
Copper Pipe, Copper Tubing & Accessories
Drilling/Tapping Machines
Ductile Iron Pipe Fittings
Expansion Couplings & Joints
Flange Fitting Accessories
Flange Fittings
Galvanized Steel Pipe Fittings
Joint Restraint
Pipe Repair
Pipe Surge Protectors
Pipe Thawers
Pipe Tools
PVC Pipe
PVC Pipe Fittings
Repair Clamps
Service Saddles; PVC
Service Saddles; SS & Bronze
Sewer Flex Couplings & Flex Saddles
Stainless Steel Pipe Fittings
Swivel Joints
Thread Sealants, Compound & Lubricant
Plugs
Freezing Equipment
Inflatable Bypass Plugs
Inflatable Plug Accessories
Inflatable Plugs
Line Testing
Mechanical Plugs
Specialty Plugs
Process Analyzers
Ammonia/Nitrate Analyzers
Boiler Controllers
Chlorine Controllers & Accessories
Chlorine Reagents/Chemicals
Conductivity Controllers & Accessories
Cooling Tower Controllers
Dissolved Oxygen Controllers & Accessories
Fluoride Controllers and Accessories
Hardness Analyzers
pH/ORP Controllers & Accessories
pH/ORP Industrial Electrodes
pH/ORP Transmitters & Monitors
Suspended Solids Controllers
Turbidity Controllers & Accessories
UV Transmittance Monitors
Hardness Analyzers
Pumps
Air Operated Double Diaphragm Pumps and Parts
Booster Pumps
Centrifugal Pumps - For Chemicals, mag-drive
Centrifugal Pumps - Self Priming
Centrifugal Pumps - Straight
Clarifier Components
Comminutors & Grinders
Diaphragm Pumps
Drum & Container Pumps
Engine Driven Pumps - Effluent
Engine Driven Pumps - Trash
General Utility & Hand Pumps
Guide Rail Systems & Accessories
Hydrostatic Test Pumps
Packing and Packing Tools
Peristaltic Hose Pumps
Progressive Cavity Pumps
Pump Repair Parts
Submersible Pumps - Dewatering & Utility
Submersible Pumps - Grinder/Shredder
Submersible Pumps - Sewage, 2" Discharge
Submersible Pumps - Sewage, 3" Discharge and Larger
Submersible Pumps - Sump & Effluent
Well Pumps
Condensate Pumps
Hydraulic Driven Pumps
Lift Station Screening Devices
Reference
Computer Software
Customer Relations Books & CDs
Electrical/Plumbing/Carpentry Reference
Informational Posters & Misc.
Laboratory Books & CDs
Management Books & CDs
Safety Books & CDs
Training Books
Training Videos & DVDs
Wastewater & Water Supply Books & CDs
Safety
Apparel: Coveralls & Chemical Resistant Wear
Apparel: Flame Resistant
Apparel: Hi-Vis Coats and Jackets
Apparel: HI-Vis Raingear
Apparel: Hi-Vis T-Shirts & Sweatshirts
Apparel: Hi-Vis Vests
Apparel: Raingear
Arc Flash Gear
Blowers & Ventilation
Communication
Confined Space: Harnesses, Lanyards & Rope Grabs
Cooling Vests, Headgear, Towels
Ergonomics
Eye Protection
Eyewash & Showers
Flammable Storage
Gas Detection: Calibration Gas
Gas Detection: Detectors & Accessories
Gas Detection: Sensor Replacements
Gloves: Disposable
Gloves: Reusable/Work/Mechanic
Hazard Warning Lights
Head Protection & Hard Hats
Hearing Protection
Ladder Safety
Life Rings & Flotation Vests
Lockout/Tagout
Personal Care: Ergonomics, Health & Hygiene
Pipe Markers
Printers & Printer Cartridges
Rehydration and Skin Care Products
Respiratory Protection: Respirators
Respiratory Protection: SCBAs
Safety Seasonal
Shoring Equipment
Sign Posts & Brackets
Signs: Admittance & Security
Signs: Binders & Stations
Signs: Chemicals & Storage
Signs: Confined Space
Signs: Electrical Safety & Lockout/Tagout
Signs: Fire Extinguisher
Signs: Hazardous Materials & Full Disclosure
Signs: Housekeeping & General Use
Signs: Lighted & Glow-in-the-dark Exit
Signs: NFPA Signals, Lettering & Placards
Signs: Personal Protective Equipment
Signs: Potable/Non-Potable Water
Signs: Products for Globally Harmonized Systems (GHS)
Signs: Tags & Labels
Signs: Visi-Signs and Flanged 2-Vue
Spill Cleanup
Spill Containment: Pallets, Berms & Plugs
Traffic Barricades, Cones & Tape
Traffic/Vehicle Signs
Tripods, Hoists & Davit Arms
Confined Space: Tripods, Hoists & Davit Arms
Cooling Vests, Headgear & Towels
Ergonomics
First Aid
Rehydration and Skin Care Products
Sampling Equipment
Filter Bed Samplers
Open Water Samplers: Dippers, Bailers, etc.
Peristalic/Vacuum Samplers & Accessories
Sampling Bags & Access.
Sampling Stations
Sludge Core Samplers
Stormwater-Specific Samplers
Tanks
Batch Mixers & Accessories
ChemTainer Tanks & Accessories
Hydropneumatic Tanks & Accessories
LMI Tanks
Miscellaneous Tanks & Accessories
Peabody Tanks & Accessories
Pulsafeeder Tanks
Snyder Tanks & Accessories
Stenner Tanks
Tools
Bolt Removal and Threading
Clean Out Tools
Crane/Hoist Accessories
Cranes and Hoists
Curb/Service Box Tools
Digging Tools
Ground Probes
Hammers
Hydraulic Tools
Hydraulic Tool Accessories
Horizontal Boring/Line Pulling
Marking, Measuring & Level Tools
Mechanics' Tool Sets
Misc. Tools
Nets, Brushes, Scrapers, Hooks & Poles
Pipe & Tubing Shut Off/Rerounding Tools
Pipe Cutters & Saws
Pipe Fitting Reamers & Flaring Tools
Pipe Threaders
Pipe Tools, Misc.
Pliers
Power Tool Accessories
Power Tools
Pry Bars
Punches & Chisels
Ridgid Special Order Tools
Screwdrivers & Nutdrivers
Sockets & Socket Accessories
Tool Boxes & Chests
Utility Knives & Cutters
Valve Tools & Operators
Wrenches
Hydraulic Tool Accessories
Hydraulic Tools
Valves
Air Release/Vacuum Valves
Backflow Preventer Accessories
Backflow Preventers: Double-Check
Backflow Preventers: RPZ
Ball Valves: Actuated
Ball Valves: Metal
Ball Valves: Misc
Ball Valves: PVC, Asahi
Ball Valves: PVC, GF
Ball Valves: PVC, Hayward
Ball Valves: PVC, Spears
Butterfly Valves: Actuated
Butterfly Valves: Iron
Butterfly Valves: PVC
Check Valves: Ball
Check Valves: Rubber Flapper
Check Valves: Silent
Check Valves: Swing
Check Valves: Wafer
Diaphragm & Pinch Valves
Enclosures/Covers for Valves & Backflow Preventers
Gate Valve Accessories
Gate Valves
Globe Valves
Needle Valves
Plug Valves
Pressure Reducing Valves
Pressure Regulating Valves
Pressure/Vacuum Relief Valves
Residential Sewer Relief Valves
Solenoid Valves: Slow-Closing
Solenoid Valves: Three-Way/Four-Way
Solenoid Valves: Two-Way
Tank Valves: Drain/Float Fill
Vacuum Breakers & Dual Check Valves
Water Hammer Arrestors
Valves for Sanitary Applications
Workwear
Boot Accessories
Caps & Hats
Clothing Accessories & Miscellaneous
Coats & Jackets
Coveralls & Overalls
Jeans & Work Pants
Overshoes
Over-the-Shoe/Sock Waterproof Boots
Sweatshirts, T-Shirts & Work Shirts
Waders & Hip Boots
Work Boots
Home
Resources
Emergency Preparedness
Certificate of Analysis Form
About Us
Agencies & Associations
Application FAQs
Catalog Library
Operator Notes
Product Recalls
Tradeshows & Conferences
Trade Groups
Training Programs
Video Gallery
Contact us
Accounting
Administrative Team
Bids & Quotes
Customer Service
Locations
GSA & GSA Advantage
International Sales
Supplier Resource Center
Repairs
Request a Catalog
Technical Support
Help
Virtual Catalog
Backflow Preventers: Double-Check
Apollo - Febco - New
25
product(s) found
View:
List view
Grid view
›
Add to cart
1
Apollo 4ALF Series Double Check Backflow Preventer, 1-1/2", 4ALF117A2
.
Item No.
51127
Call for availability
Price $778.95
$778.
95
Add to Order Template
−
+
Unit of measure
each
Your selection:
Brand Name
Apollo
Febco
Condition
New
Clear selection
Filters:
Product category
Valves
(25)
Valves\Backflow Preventers: Double-Check
(25)
Brand Name
Apollo
Febco
Watts
(30)
Zurn Wilkins
(35)
Condition
New
