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Check it out! New Mainline Floodstop protects homes from leaks & floods!

ALL PRODUCTS
- Bathroom
  
  Bathroom Accessories
  Bathroom Faucets
  Bath Waste
  Bathtubs
  Toilets
  Roman Tub Faucets
  Shower Drains
  Toilet Seats
  Tub & Shower Faucets
  Paper Holders
  Robe Hooks
  Towel Bars
  Towel Rings
  Lavatory Sinks
  Replacement Cartridge
- Chemicals & Adhesives
  
  Applicators & Accessories
  Caulk
  Cements
  Cleaner & Primer
  Oils & Greases
  Putty
  Rags
  Solder
  Thread Seal Paste & Tape
- Commercial
  
  Commercial Accessories
  Commercial Faucets
  Commercial Toilet Seats
  Flat Top Strainers
  Grid Drains
- Drains
  
  Cleanout Covers
  Cleanout Plugs & Fittings
  Snap-In Drains & Covers
  Trap Seals
- Fittings
  
  Black Fittings
  Black Nipples
  Brass Nipples
  Dielectric Unions & Flanges
  Flexible Pipe Caps
  Galvanized Fittings
  Lead Free* Bronze Fittings
  No-Hub Couplings
  Push Connect Fittings
  Transition Couplings
- Hangers & Fasteners
  
  Pipe Clamps, Insulators & J-Hooks
  Pipe Hangers & Supports
  Strut Fittings
  Fasteners
- HVAC
  
  Inno-Tough Insulation
  HVAC Parts
- Kitchen
  
  Bar & Laundry Faucets
  Disposers
  Kitchen Faucets
  Sink Strainers
  Stainless Steel Sinks
- Repair Parts
  
  Water Heater Parts
  Hydrant Parts
- Rough Plumbing
  
  Air Admittance Valves
  Fire Rated Outlet Boxes
  Gas Valve Outlet Boxes
  Hammer Arrestors
  Ice Maker Outlet Boxes
  MultiBox Outlet Boxes
  Plastic Hammer Arresters
  Installation Accessories
  Roof Flashings
  Shower Pan Liner
  Test Caps
  Test Plugs
  Tub Boxes & Liners
  Washing Machine Outlet Boxes
- Specialties
  
  Bottled Water
  Pipe Insulation
  Roto-Molded Coolers
  Insoles
  Kneelmat
  Closet Repair Kit
- Stops & Supplies
  
  Connectors & Risers
  Flanges & Escutcheons
  Gas Connectors
  Stops
- Tools
  
  Brushes
  Gloves
  Sand Cloth
  Tape Measures
  Wiping Cloths
- Tubular
  
  Brass Tubular
  ABS & PVC Tubular
  Drain Connectors
  Flanges & Escutcheons
- Valves
  
  Ball Valves
  Butterfly Valves
  Gas Ball Valves
  Gate Valves
  Plastic Ball Valves
  Tankless Water Heater Valve Kits
  Leak Detection Kit
  Vacuum Breakers
- Ventilation
  
  Elbows
  Caps
  Pipes
  Guards
  Flex Venting Components
  Flashing
  Termination
- Water Systems
  
  Battery Back-ups
  Effluent Pumps
  Expansion Tanks
  Meter Boxes
  Remote Sink/Drain Pump System
  Sewage Pumps
  Stainless Steel Clamps
  Sump Pumps
  Transfer Pumps
  Utility Pumps
  Valve Boxes
  Well Tanks
  Descaler Kit
  Condensate Pumps
About Mainline
Resources
ProSolutions
Where to Buy
Find Parts

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ALL PRODUCTS
- Bathroom
  
  Bathroom Accessories
  Bathroom Faucets
  Bath Waste
  Bathtubs
  Toilets
  Roman Tub Faucets
  Shower Drains
  Toilet Seats
  Tub & Shower Faucets
  Paper Holders
  Robe Hooks
  Towel Bars
  Towel Rings
  Lavatory Sinks
  Replacement Cartridge
- Chemicals & Adhesives
  
  Applicators & Accessories
  Caulk
  Cements
  Cleaner & Primer
  Oils & Greases
  Putty
  Rags
  Solder
  Thread Seal Paste & Tape
- Commercial
  
  Commercial Accessories
  Commercial Faucets
  Commercial Toilet Seats
  Flat Top Strainers
  Grid Drains
- Drains
  
  Cleanout Covers
  Cleanout Plugs & Fittings
  Snap-In Drains & Covers
  Trap Seals
- Fittings
  
  Black Fittings
  Black Nipples
  Brass Nipples
  Dielectric Unions & Flanges
  Flexible Pipe Caps
  Galvanized Fittings
  Lead Free* Bronze Fittings
  No-Hub Couplings
  Push Connect Fittings
  Transition Couplings
- Hangers & Fasteners
  
  Pipe Clamps, Insulators & J-Hooks
  Pipe Hangers & Supports
  Strut Fittings
  Fasteners
- HVAC
  
  Inno-Tough Insulation
  HVAC Parts
- Kitchen
  
  Bar & Laundry Faucets
  Disposers
  Kitchen Faucets
  Sink Strainers
  Stainless Steel Sinks
- Repair Parts
  
  Water Heater Parts
  Hydrant Parts
- Rough Plumbing
  
  Air Admittance Valves
  Fire Rated Outlet Boxes
  Gas Valve Outlet Boxes
  Hammer Arrestors
  Ice Maker Outlet Boxes
  MultiBox Outlet Boxes
  Plastic Hammer Arresters
  Installation Accessories
  Roof Flashings
  Shower Pan Liner
  Test Caps
  Test Plugs
  Tub Boxes & Liners
  Washing Machine Outlet Boxes
- Specialties
  
  Bottled Water
  Pipe Insulation
  Roto-Molded Coolers
  Insoles
  Kneelmat
  Closet Repair Kit
- Stops & Supplies
  
  Connectors & Risers
  Flanges & Escutcheons
  Gas Connectors
  Stops
- Tools
  
  Brushes
  Gloves
  Sand Cloth
  Tape Measures
  Wiping Cloths
- Tubular
  
  Brass Tubular
  ABS & PVC Tubular
  Drain Connectors
  Flanges & Escutcheons
- Valves
  
  Ball Valves
  Butterfly Valves
  Gas Ball Valves
  Gate Valves
  Plastic Ball Valves
  Tankless Water Heater Valve Kits
  Leak Detection Kit
  Vacuum Breakers
- Ventilation
  
  Elbows
  Caps
  Pipes
  Guards
  Flex Venting Components
  Flashing
  Termination
- Water Systems
  
  Battery Back-ups
  Effluent Pumps
  Expansion Tanks
  Meter Boxes
  Remote Sink/Drain Pump System
  Sewage Pumps
  Stainless Steel Clamps
  Sump Pumps
  Transfer Pumps
  Utility Pumps
  Valve Boxes
  Well Tanks
  Descaler Kit
  Condensate Pumps
About Mainline
Resources
ProSolutions
Where to Buy
Find Parts

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Collection: Pipe Nipples

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Why Mainline?

Because we know the industry. Because we innovate for it. Because we adapt to it. Because we are constantly expanding our line to support your needs. Because we help you propel each project with quality products fit for a PRO.

Mainline. Prefered by the Pros.

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