Bathroom Plumbing (154383)
- Steam Baths & Saunas (715)
- Tubular (5370)
- Bathroom Furniture (1805)
- Shower Drains (377)
- Bathtubs (5988)
- Showers (62645)
- Bathroom Accessories (11367)
- Toilets, Seats, Bidets, Urinals, Flush Valves (11967)
- Bathroom Faucets (36399)
- Baby Changing (0)
- Waste & Overflow Drains (1088)
- Bathroom Repair Parts (12609)
- Bathroom Sinks (4053)
Extreme Deals (60)
HVAC/R (19467)
- Air Distribution (3361)
- HVAC/R Installation Supplies (1470)
- Indoor Air Quality (1317)
- Refrigeration (432)
- Ventilation/TestEN (2635)
- Controls & Thermostats (529)
- HVAC/R Equipment (2716)
- HVAC/R Parts (7007)
Uncategorized (7)
L1 name test category (0)
- L2 test name category (0)
- L2 test name category (0)
- L2 test name category (0)
Test Level One Category EN (0)
Kitchen Plumbing (18747)
- Kitchen Accessories (2113)
- Kitchen Repair Parts (2078)
- Kitchen Sinks (4467)
- Kitchen Faucets (9853)
- Garbage Disposal (68)
- Garbage Disposal Parts & Accessories (168)
Plumbing Parts & Supplies (9125)
- Water Supply Connectors (693)
- Compounds & Lubricants (617)
- Pool & Spa Supplies (53)
- Stops & Risers (72)
  - Supply Risers (63)
- Rough-In Plumbing (6466)
- Drain & Waste System Cleaners (54)
- Dry Materials & Compounds (9)
- Gaskets, Packings & Seals (1160)
Water Heaters (8329)
- Commercial Storage Tanks (84)
- Commercial Water Heaters (1051)
- Residential Water Heaters (1009)
- Commercial Rack Systems (28)
- Residential Home Heating (31)
- Water Heater Parts & Accessories (6055)
- Residential Storage Tanks (71)
Pipe, Valves & Fittings (54382)
- Hangers, Strut & Fasteners (7502)
- Pipe & Tubing (2539)
- Pipe Fittings (29154)
- Pipeline Pigs & Cleaning Pigs (5)
- Valves (15110)
- Water Hammer Arrestors (27)
- Foam Pigs (45)
Pumps (11916)
- Hand Pumps (6)
- Gear Pumps (9)
- Grinder Pumps (1030)
- Window Wells (10)
- Water Well Pumps (1187)
  - Jet Pumps (61)
  - Submersible Pumps (949)
  - Submersible Motors (32)
  - Water Well Pump Accessories (124)
  - Water Well Pumps (14)
- Pumps Accessories (3154)
- Back-up Pumps (27)
- Vacuum Pumps (43)
- Water Well Parts & Accessories (67)
- Water Filtration & Treatment (1738)
  - Water Filters (234)
  - Water Treatment Parts & Accessories (773)
  - Filter Tools (19)
  - Filter Housings (74)
  - Water Softening (136)
  - Water Purifiers & Conditioners (124)
  - Water-Proof Membrane (6)
  - Filter Cartridges (351)
  - Other Products (20)
- Transfer Pumps (51)
- Dewatering Pumps (1)
- Diaphragm Pumps (2)
- Chemical Feed Pumps (9)
- Fountain Pumps (20)
- Sump & Sewage Pumps (2343)
  - Sump Pump Accessories (197)
  - Effluent/Sewage Pump Accessories (239)
  - Sump Pumps (244)
  - Effluent/Sewage Pumps (1663)
- Coolant Pumps (5)
- Drain Pumps (22)
- Pump Systems (16)
  - Laundry Tray Systems (16)
- Elevator Pumps (37)
- Hydrostatic Test Pumps (22)
- Drum Pumps (0)
- Potable Water Expansion Tanks (123)
- Magnetic Driven Pumps (83)
- Trash Pumps (1)
- Utility Pumps (23)
- Circulator Pumps (1770)
  - Booster Pumps (58)
  - Centrifugal Pumps (629)
  - Circulator Pumps (1075)
- Condensate Pumps (117)
Hydronics (10839)
- Burner Nozzles (344)
- Burners (86)
- In-Floor Heating (1)
- Baseboards (377)
- Boilers (3147)
- Gauges & Thermometers (1237)
  - Thermometers (151)
  - Gauges (1086)
- Hydronic Controls & Sensors (509)
- Hydronic Supplies (3197)
- Hydronic Valves (1869)
- Hydronic Heating Products (44)
- Oil Burner Control (28)
Fire Protection (1156)
- Chemicals (1)
- Fire Department Connections (48)
- Fire Hose & Accessories (90)
- Nozzles (21)
- Sprinkler Controls, Sensors, Alarms & Parts (105)
- Firestop Cast-In & Sleeve Devices (31)
- Accessories (52)
- Compressors (27)
- Extinguishers (17)
- Switches (53)
- Cabinets (22)
  - Accessories (22)
- Sprinkler Heads (689)
Fireplaces & Stoves (1276)
- Stoves (29)
- Fireplaces (226)
  - Controls, Logs and Accessories (65)
  - Fireplaces (161)
- Stove Accessories (49)
- Firebox & Hearth Components (0)
- Fireplace Surrounds, Mantles, Bases, Trim (60)
- Fireplace Accessories (777)
- Fireplace Vent Pipe & Fittings (121)
- Firepits (14)
Waterworks (11157)
- Ductile Iron Pipe (88)
- PEX Municipal Pipe (39)
- Poly Series 160 Service Line Tube (2)
- Repair Clamps & Couplings (785)
- AWWA Valves & Hydrants (2026)
  - Indicator Posts (6)
  - AWWA Valves (494)
    - Resilient Wedge Gate Valves (388)
    - Waterworks Tapping Valves (106)
  - Fire Hydrants (1526)
- Castings & Cast Iron Boxes, Frames & Covers (1897)
  - Inlet Frames, Covers & Accessories (123)
  - Manhole Frames, Covers & Accessories (743)
  - Paving Risers (50)
  - Service Boxes, Lids & Accessories (409)
  - Trench Adapters (5)
  - Valve Boxes, Lids & Accessories (567)
- Irrigation & Drainage (629)
  - Baffles & Skimmers (3)
  - Catch Basins (101)
  - Drains, Grates & Accessories (470)
  - Irrigation Boxes (3)
  - Irrigation Controls & Parts (9)
  - Irrigation Pipe (42)
  - Irrigation Sprinklers (1)
  - Irrigation Valves (0)
- Meters (670)
  - AMR (Automated Meter Reading) (14)
  - Water Meter Accessories (224)
  - Water Meter Box Parts (20)
  - Water Meter Boxes & Lids (28)
  - Water Meter Repair & Replacement Parts (48)
  - Water Meters (336)
- PVC Pressure Pipe (44)
  - DR18 Pipe (13)
  - DR25 Pipe (9)
  - DR26 Pipe (0)
  - PVC Pipe (20)
- Sewer & Drain Fittings (939)
  - Saddles (77)
  - Gasketed Sewer Fittings (454)
  - Ribbed Sewer Fittings (276)
  - Adapters (6)
  - Plastic Tees (119)
  - Clips (7)
- Sewer & Drain Pipe (428)
  - DR14 Gasketed Pipe (8)
  - DR18 Gasketed Pipe (39)
  - DR21 Gasketed Pipe (7)
  - DR25 Gasketed Pipe (4)
  - DR26 Gasketed Pipe (23)
  - DR28 Gasketed Pipe (27)
  - DR35 Gasketed Pipe (64)
  - DR41 Gasketed Pipe (2)
  - KorFlo (10)
  - Ultra Rib Pipe (210)
  - Sewer & Drain Pipe (34)
- Watermain Fittings (1017)
  - Cut in Sleeves (19)
  - Restrainers (217)
  - Cast Iron Fittings & Flanges (90)
  - Compression Fittings (45)
  - Ductile Fittings (280)
  - Gland Rings, Gaskets & Bolts (257)
  - PVC Press Ftgs (80)
  - Brass Fittings (18)
    - Adapters (18)
  - Aluminum Fittings (4)
    - Couplings (4)
  - Steel Fittings (7)
    - Elbows (7)
- Waterworks Specialty Products (1)
  - Pipe & Valve Identification Products (0)
  - Thaw Wire (0)
- AWWA Service Brass & Saddles (1854)
  - AWWA Service Brass (984)
  - AWWA Service Saddles (870)
- Geosynthetics & Stormwater Management (300)
  - Erosion Control (30)
    - Erosion Control Materials (29)
    - Grade Stakes (1)
  - Geosynthetics (180)
  - Stormwater Products (90)
- Cut in Sleeves (5)
- Ductile Fittings (19)
  - Ductile Iron Reducers (3)
  - Ductile Iron Tees (12)
  - Ductile Iron Caps (1)
  - Ductile Iron Elbows (3)
- Cast Iron Fittings & Flanges (14)
  - Cast Iron Elbows (4)
  - Cast Iron Adapters (8)
  - Cast Iron Crosses (2)
- Plastic Fittings (335)
  - Plastic Flanges (1)
  - Plastic Couplings (77)
  - Plastic Reducers (6)
  - Plastic Adapters (62)
  - Plastic Bushings (9)
  - Plastic Tees (115)
  - Plastic Elbows (64)
  - Plastic Bends (1)
- Pipe & Tubing (29)
  - Plastic Pipe (29)
- Gland Rings, Gaskets & Bolts (36)
  - Seal (35)
Tools (26369)
- Generators (32)
  - Generator Parts & Accessories (19)
  - Generators (13)
- Confined Space Equipment (9)
  - Smoke Blowers (8)
- Flashlights, Lanterns & Worklights (106)
- Manifolds (2)
- Power Tools & Accessories (13273)
- Waterworks Tools (36)
- Material Handling (204)
- Cords, Connectors & Cables (181)
- Printers (3)
- Ladders & Scaffolds (40)
- Heated Gear (358)
- Pipe/Tubing Tools (7281)
- Welding, Soldering & Torch Equipment (508)
- HVAC Tools (202)
- Workbenches (2)
- Hand Tools (3787)
- Radios (9)
- Tool Storage (202)
- Locating Tools & Accessories (134)
Safety & Security (2238)
- Workwear (388)
- Locks (13)
- First Aid (77)
- Batteries (74)
- Fire Safety (216)
- Signage, Markers & Barriers (393)
- Chemical & Gas Storage (8)
- Ventilation & Gas Detection (66)
- Respiratory Safety (36)
- Welding Safety (2)
- Hand Protection (564)
  - Glove Accessories (9)
  - Gloves (555)
- Hearing Protection (19)
  - Ear Muffs (2)
  - Ear Plugs (17)
- Spill Control & Containment (9)
- Back Support (0)
- Eye & Face Protection (112)
- Fall Safety (70)
- Footwear (12)
  - Shoe Cover (11)
- Head Protection (139)
  - Hard Hats & Accessories (139)
- Protective Apparel (40)
Electrical (38165)
- Connectors (129)
- Wallplates (16)
- Wire Terminals & Connectors (158)
- Disconnects (9)
- Electrical Conduit Pipe (27)
- Relays (185)
- Fuses (73)
- Power Supply (35)
- Circuit Breakers & Meters (95)
- Smart Home (108)
  - Smart Devices (82)
  - Smart Accessories (26)
- Grounding & Bonding (17)
- Electrical Conduit Fittings (98)
  - Adapters (29)
  - Reducers (0)
  - Couplings (11)
  - Plugs (8)
  - Bodies (1)
  - Sweeps (2)
  - Tees (4)
  - Elbows (15)
  - Bushings & Washers (13)
  - Caps (1)
  - Clips (13)
  - Nipples (1)
- Surge Protectors (7)
- Wire & Cable (415)
- Electrical Outlet Boxes (79)
- Lighting & Lighting Fixtures (35255)
  - Bath Lightings (4179)
  - Bulbs (468)
  - Sconces (8398)
  - Chandeliers (4089)
  - Pendants (7051)
  - Other Products (11067)
- Tracer Boxes (1)
- Wire Fittings (1)
- Contactors (145)
- Wire Management (66)
  - Wire/Cable Clamps (16)
  - Other Products (50)
- Doorbells (18)
- Photo Cells (0)
- Timers & Switches (486)
- Lamps & Accessories (429)
- Test Leads (39)
- Transformers (97)
- Box Covers & Plates (125)
- Plugs & Receptacles (42)
- Whips (9)
- Raceways (1)
Adhesives, Sealants & Paints (1308)
- HVAC Tapes (63)
- Lubricants (84)
- Adhesive Compounds (72)
- Spray Paint (67)
- Sealants (307)
- Abrasives (15)
- Mastics (9)
- Solvents & Removers (47)
- Brushes, Rollers & Paint Accessories (69)
- Surface Repair (8)
- Markers & Crayons (81)
- Caulk & Caulk Guns (52)
- Tapes (179)
- Compounds & Lubricants (38)
- Primers & Paints (78)
- Brushes (139)
Janitorial (486)
- Paper Toilet Covers (0)
- Cleaning Equipment & Supplies (231)
- Cleaning Chemicals (168)
- Trash Can (41)
- Paper Products (21)
- Floor Cleaning (8)
  - Floor Cleaners (5)
  - Floor Pads (2)
- Bulk Cut Plastic Blocks (0)
- Office Supplies (17)
Septic (133)
- Septic Tank Inspection Plugs (1)
- Septic Pipe & Fittings (1)
- Septic Tanks (39)
  - Two Compartment Septic Tanks (12)
  - Single Compartment Septic Tanks (27)
- Distribution Boxes (6)
- Septic Tanks Parts & Accessories (60)
- Septic Chambers (22)
- Septic Vent Caps (4)
Water Fountains & Coolers (538)
- Wash Fountains (1)
- Drinking Fountains (255)
- Bubblers (21)
- Water Coolers (131)
- Chillers (28)
- Water Fountains & Coolers Accessories (102)

574206A 1/2"PRSS INLET X 1/2"PRSS OUTL

Manufacturer: Caleffi

$0.00

Qty:

Products specifications

products.specs.attributename	products.specs.attributevalue
Product Type	Backflow Preventers