Drain Parts & Accessories

Drain parts and accessories support commercial plumbing maintenance, repair, and replacement work in sinks, floor drains, floor sinks, and compatible roof drain assemblies. This category includes strainers that help cover drain openings and catch debris, complete and partial sink drain assemblies, drain domes, and specialized replacement parts for facility maintenance teams and plumbing professionals.

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Helpful Buying Guide

Choose Drain Parts for the Drain Type and Required Fit

Commercial drain maintenance can involve a simple replacement strainer, a drain assembly with connection hardware, or a specific component such as a dome, bushing, or overflow head. Start by identifying the drain location and application, then compare the stated opening size, connection type, dimensions, and included components.

Visual Guide

Popular examples in this category

Flat Waste Drain Strainer for 3-Inch Sink OpeningsFlat Waste Drain Strainer for 3-Inch Sink OpeningsWBB2948599Plastic Drop-In Floor Drain StrainerPlastic Drop-In Floor Drain StrainerWBB2948602White Floor Sink Dome StrainerWhite Floor Sink Dome StrainerWBB2949700Sink Drain Flange Assembly for 3-1/2-Inch OpeningSink Drain Flange Assembly for 3-1/2-Inch OpeningWBB2947420
Use Cases

Support routine drain maintenance and replacement

Use flat or basket strainers to cover compatible sink openings and help retain debris. Choose drain assemblies when a sink needs a drain connection, and select domes, bushings, or overflow heads for targeted repair work.

How to Choose

Match the opening, connection, and component style

Confirm whether the item is intended for a sink, floor drain, floor sink, or roof drain application. Compare stated opening fit, flange or outside dimensions, NPS or threaded connection details, and compatibility notes before selecting.

Applications

Options for sinks, floor drains, floor sinks, and roof drains

The represented options include flat strainers and assemblies for commercial sinks, a drop-in strainer for small floor drains, a dome strainer for floor sinks, and a replacement dome for a compatible roof drain membrane clamp.

Additional Information

Review what is included with each part

Included components vary by item. Selected drain assemblies include a flat or basket strainer, gasket, stopper, washer, locknut, tailpiece, coupling nut, or flanged washer, while replacement parts may be sold as a single targeted component.

1-7/8 to 2 in.Small sink-opening range

Stated compatibility for one stainless steel sink drain assembly.

3 in. or 3-1/2 in.Dual opening options

Specified compatibility for the lever-handle bushing and overflow head assembly.

1 in. NPSBrass drain connection

Listed connection size for the brass sink drain.

1-1/2 in. MPTBasket assembly tailpiece

Listed tailpiece connection for the stainless steel basket drain assembly.

Comparison Guide

Compare Common Drain Part Types

Use this overview to distinguish the represented styles and the fit details that matter most during selection.

Product typeBest suited forKey selection details
Flat or drop-in strainerCovering compatible sink or small floor drain openingsCompare the drain location, stated opening fit, outside diameter, or flange dimensions.
Drain assemblySink installation or replacement requiring a drain connectionCheck the sink opening, connection or tailpiece details, and included strainer, stopper, gasket, or hardware.
Dome or targeted replacement partFloor sink, roof drain, or drain assembly repair workMatch the component style, stated dimensions, and specific compatibility such as the RD2190 membrane clamp or a lever-handle assembly.
Planning Guide

Plan the right fit before choosing

Start With the Drain Location

Select a part designed for the application

Different drain locations call for different component styles. Sink options include flat strainers, basket drain assemblies, flange assemblies, a brass drain, a lever-handle bushing, and an overflow head assembly. Floor drain and floor sink choices include drop-in and dome-style strainers. A cast iron dome is specified for a compatible roof drain membrane clamp.

  • Flat sink strainers are available for compatible 3-inch and 3-1/2-inch sink openings.
  • The plastic drop-in strainer fits compatible small floor drains and is described as a secondary strainer beneath the floor drain.
  • The white dome strainer is intended for floor sink drain areas.
  • The cast iron replacement dome is for an RD2190 universal membrane clamp.
Compare Fit and Connection Details

Use stated sizes to narrow compatible choices

Opening diameter is a primary selection factor for sink components. Also compare the outside diameter or flange size where provided, as well as NPS, MPT, or tailpiece connection details for drain assemblies.

  • Compatible sink opening sizes represented include 1-7/8 to 2 inches, 3 inches, 3-1/2 inches, and dual 3-inch or 3-1/2-inch applications.
  • A brass sink drain is specified for a 1-3/8-inch sink opening and has a 1-inch NPS connection.
  • The stainless steel basket drain assembly has a 1-1/2-inch MPT tailpiece.
  • The waste drain overflow head assembly has a 1-1/4-inch NPS connection.
Decide Between a Strainer, Assembly, or Replacement Part

Choose the level of replacement needed

A standalone strainer can provide a low-profile drain-covering component, while a drain assembly may include connection and installation pieces. For a repair limited to one component, a replacement dome, bushing, or overflow head may be the appropriate type to compare.

  • Flat strainers provide low-profile coverage for compatible sink openings.
  • Basket strainers help catch debris and may be removable, depending on the assembly.
  • One stainless steel sink drain assembly includes a rubber stopper for closing the sink drain when needed.
  • Listed installation components on selected items include gaskets, locknuts, washers, a coupling nut, and a flanged washer.
FAQ

Common questions before buying

What drain parts are available for commercial sinks?

The represented sink options include flat strainers, flange and basket drain assemblies, a brass sink drain, a waste drain lever-handle bushing, and an overflow head assembly.

How do I choose a sink drain strainer?

Match the strainer to the stated sink opening size and check the listed outside diameter or flange dimensions when provided. Flat strainer options are represented for compatible 3-inch and 3-1/2-inch openings.

What is the difference between a drain strainer and a drain assembly?

A strainer is a drain-covering component that can help catch debris. A drain assembly provides additional drain connection components and may include items such as a gasket, stopper, locknut, washer, or tailpiece.

Which part is compatible with an RD2190 universal membrane clamp?

The cast iron replacement dome is specified for use with an RD2190 universal membrane clamp.

Helpful Buying Guide

Choose Drain Parts for the Drain Type and Required Fit

Commercial drain maintenance can involve a simple replacement strainer, a drain assembly with connection hardware, or a specific component such as a dome, bushing, or overflow head. Start by identifying the drain location and application, then compare the stated opening size, connection type, dimensions, and included components.

Visual Guide

Popular examples in this category

Flat Waste Drain Strainer for 3-Inch Sink OpeningsFlat Waste Drain Strainer for 3-Inch Sink OpeningsWBB2948599Plastic Drop-In Floor Drain StrainerPlastic Drop-In Floor Drain StrainerWBB2948602White Floor Sink Dome StrainerWhite Floor Sink Dome StrainerWBB2949700Sink Drain Flange Assembly for 3-1/2-Inch OpeningSink Drain Flange Assembly for 3-1/2-Inch OpeningWBB2947420
Use Cases

Support routine drain maintenance and replacement

Use flat or basket strainers to cover compatible sink openings and help retain debris. Choose drain assemblies when a sink needs a drain connection, and select domes, bushings, or overflow heads for targeted repair work.

How to Choose

Match the opening, connection, and component style

Confirm whether the item is intended for a sink, floor drain, floor sink, or roof drain application. Compare stated opening fit, flange or outside dimensions, NPS or threaded connection details, and compatibility notes before selecting.

Applications

Options for sinks, floor drains, floor sinks, and roof drains

The represented options include flat strainers and assemblies for commercial sinks, a drop-in strainer for small floor drains, a dome strainer for floor sinks, and a replacement dome for a compatible roof drain membrane clamp.

Additional Information

Review what is included with each part

Included components vary by item. Selected drain assemblies include a flat or basket strainer, gasket, stopper, washer, locknut, tailpiece, coupling nut, or flanged washer, while replacement parts may be sold as a single targeted component.

1-7/8 to 2 in.Small sink-opening range

Stated compatibility for one stainless steel sink drain assembly.

3 in. or 3-1/2 in.Dual opening options

Specified compatibility for the lever-handle bushing and overflow head assembly.

1 in. NPSBrass drain connection

Listed connection size for the brass sink drain.

1-1/2 in. MPTBasket assembly tailpiece

Listed tailpiece connection for the stainless steel basket drain assembly.

Comparison Guide

Compare Common Drain Part Types

Use this overview to distinguish the represented styles and the fit details that matter most during selection.

Product typeBest suited forKey selection details
Flat or drop-in strainerCovering compatible sink or small floor drain openingsCompare the drain location, stated opening fit, outside diameter, or flange dimensions.
Drain assemblySink installation or replacement requiring a drain connectionCheck the sink opening, connection or tailpiece details, and included strainer, stopper, gasket, or hardware.
Dome or targeted replacement partFloor sink, roof drain, or drain assembly repair workMatch the component style, stated dimensions, and specific compatibility such as the RD2190 membrane clamp or a lever-handle assembly.
Planning Guide

Plan the right fit before choosing

Start With the Drain Location

Select a part designed for the application

Different drain locations call for different component styles. Sink options include flat strainers, basket drain assemblies, flange assemblies, a brass drain, a lever-handle bushing, and an overflow head assembly. Floor drain and floor sink choices include drop-in and dome-style strainers. A cast iron dome is specified for a compatible roof drain membrane clamp.

  • Flat sink strainers are available for compatible 3-inch and 3-1/2-inch sink openings.
  • The plastic drop-in strainer fits compatible small floor drains and is described as a secondary strainer beneath the floor drain.
  • The white dome strainer is intended for floor sink drain areas.
  • The cast iron replacement dome is for an RD2190 universal membrane clamp.
Compare Fit and Connection Details

Use stated sizes to narrow compatible choices

Opening diameter is a primary selection factor for sink components. Also compare the outside diameter or flange size where provided, as well as NPS, MPT, or tailpiece connection details for drain assemblies.

  • Compatible sink opening sizes represented include 1-7/8 to 2 inches, 3 inches, 3-1/2 inches, and dual 3-inch or 3-1/2-inch applications.
  • A brass sink drain is specified for a 1-3/8-inch sink opening and has a 1-inch NPS connection.
  • The stainless steel basket drain assembly has a 1-1/2-inch MPT tailpiece.
  • The waste drain overflow head assembly has a 1-1/4-inch NPS connection.
Decide Between a Strainer, Assembly, or Replacement Part

Choose the level of replacement needed

A standalone strainer can provide a low-profile drain-covering component, while a drain assembly may include connection and installation pieces. For a repair limited to one component, a replacement dome, bushing, or overflow head may be the appropriate type to compare.

  • Flat strainers provide low-profile coverage for compatible sink openings.
  • Basket strainers help catch debris and may be removable, depending on the assembly.
  • One stainless steel sink drain assembly includes a rubber stopper for closing the sink drain when needed.
  • Listed installation components on selected items include gaskets, locknuts, washers, a coupling nut, and a flanged washer.
FAQ

Common questions before buying

What drain parts are available for commercial sinks?

The represented sink options include flat strainers, flange and basket drain assemblies, a brass sink drain, a waste drain lever-handle bushing, and an overflow head assembly.

How do I choose a sink drain strainer?

Match the strainer to the stated sink opening size and check the listed outside diameter or flange dimensions when provided. Flat strainer options are represented for compatible 3-inch and 3-1/2-inch openings.

What is the difference between a drain strainer and a drain assembly?

A strainer is a drain-covering component that can help catch debris. A drain assembly provides additional drain connection components and may include items such as a gasket, stopper, locknut, washer, or tailpiece.

Which part is compatible with an RD2190 universal membrane clamp?

The cast iron replacement dome is specified for use with an RD2190 universal membrane clamp.

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