Choosing the best drain for a 3 compartment sink starts with two measurements: the sink opening and the drain connection below it. The options here are designed for a 3½-inch sink opening and use a 2-inch outlet or connection, but they differ in overflow design and materials. Check your sink and plumbing before ordering so the drain fits both the basin and the existing waste line.
Quick Comparison
| Product | Overflow | Key materials | Connection | Best for |
|---|---|---|---|---|
| Phivan Commercial Sink Drain | Yes | Die-cast brass body; stainless steel components | 2-inch outlet | A 3½-inch opening where an overflow is wanted |
| Sepaitek Drain, No Overflow | No | Zinc alloy body; 304 stainless steel components | 2-inch NPT thread | A compatible sink and waste line without an overflow |
| Sepaitek Drain with Overflow | Yes | Zinc alloy body; 304 stainless steel components | 2-inch NPT thread | A compatible sink that needs an overflow drain |
Our Picks: Best Drain For 3 Compartment Sink reviews
Phivan Commercial Drain with Twist Handle and Overflow
The Phivan is a commercial-style drain valve for sinks with a 3½-inch opening. Its twist handle lets you control the stopper without reaching into the basin, which can be useful when a compartment holds used wash water. The listing also describes a pull-style handle operation, so check the pictured configuration and included parts to make sure it suits your installation.
The drain body is described as die-cast solid brass with a metal coating. The kit includes a stainless steel drain plunger, strainer, flange, and handles. Its 2-inch outlet is intended for a matching commercial drain connection, so measure your existing plumbing rather than assuming it will connect directly.
This is the option to consider if you want an overflow feature and the sink has a compatible overflow opening. An overflow drain will not create an overflow channel in a sink that was not designed for one, so verify the basin configuration before buying. Compared with the Sepaitek options, the Phivan listing specifies a brass drain body, while those models use zinc alloy.
Pros:
- Designed for a 3½-inch sink opening.
- Includes an overflow feature.
- Handle operation avoids reaching into the basin to release the stopper.
- Kit includes a plunger, strainer, flange, and handles.
Cons:
- The 2-inch outlet may not match your existing drain plumbing.
- You need to confirm that your sink is built for an overflow drain.
Verdict: Choose the Phivan if your sink has a 3½-inch opening, needs an overflow drain, and matches its 2-inch outlet.
Sepaitek No-Overflow Drain with Stainless Components
This Sepaitek drain is the no-overflow choice in the group. It is designed for a 3½-inch sink opening and has a 2-inch NPT threaded connection. The drain body is zinc alloy, while the stopper, handle, and strainer are listed as 304 stainless steel with a chrome-polished finish.
The twist handle lets you open and close the drain from below the sink, rather than handling the stopper in the basin. The listing also describes a rubber-coated handle tip and thicker gaskets. For installation, it calls for sealant and careful gasket placement; take time to check the washer positions and tighten the parts evenly.
The key limit is fit: the listing says this drain will not fit a 3-inch sink opening, and its 2-inch NPT thread will not attach directly to a 1½-inch connection. A reducing adapter is sold separately for that difference. Compared with the overflow models, this is the more suitable configuration only when your sink does not require an overflow drain.
Pros:
- No-overflow design for sinks that do not use an overflow connection.
- Uses a 3½-inch sink opening and a 2-inch NPT connection.
- Stopper, handle, and strainer are listed as 304 stainless steel.
- Twist handle allows drain control from below the sink.
Cons:
- Does not fit a 3-inch opening or connect directly to a 1½-inch pipe.
- A reducing adapter, if needed, is sold separately.
Verdict: Pick this Sepaitek model when your sink has no overflow, and both the 3½-inch opening and 2-inch threaded connection match your setup.
Sepaitek Commercial Drain with Overflow
This Sepaitek model has an overflow and a twist-handle waste valve. Like the no-overflow version, it is intended for a 3½-inch sink opening and has a 2-inch NPT thread. Its drain body is zinc alloy, and the stopper, handle, and strainer are listed as 304 stainless steel with a chrome-polished finish.
The handle is operated from below the sink, and the listing describes a rubber-coated handle tip and thickened sealing gaskets. Installation involves positioning the gaskets, applying silicone sealant, and securing the flange. If you are replacing a drain, compare the existing connection and overflow arrangement before starting.
This is the closest Sepaitek alternative to the Phivan, but the two brands specify different drain-body materials. The listed connection and sink-opening requirements are important either way: a 1½-inch waste line needs a separate reducer, and this drain will not fit a 3-inch sink opening.
Pros:
- Includes an overflow feature for a compatible sink.
- Designed for a 3½-inch sink opening and 2-inch NPT connection.
- Stopper, handle, and strainer are listed as 304 stainless steel.
- Twist handle controls the drain without reaching into the basin.
Cons:
- Requires a matching overflow configuration and sink opening.
- A 1½-inch pipe requires a separately sold reducing adapter.
Verdict: Choose this model if you want a Sepaitek drain with an overflow and your sink and plumbing match its stated dimensions.
How to Choose a Drain for a 3 Compartment Sink
Measure the sink opening
Start by measuring the drain opening in the sink basin you are repairing or outfitting. These three options are listed for 3½-inch openings, and the Sepaitek listings specifically warn that they do not fit 3-inch openings. If you are replacing more than one drain, check each compartment rather than assuming all openings are the same.
Match the drain connection to your plumbing
Check the size and type of the existing connection below the sink. The listed drains use a 2-inch outlet or 2-inch NPT thread. The Sepaitek listings say a 1½-inch connection will not attach directly and that a reducing adapter is sold separately. Confirm the connection before ordering, and check whether any required adapter is included or needs to be purchased separately.
Choose the right overflow configuration
An overflow drain is only appropriate when the sink has a compatible overflow opening and channel. The Phivan and one Sepaitek option include an overflow; the other Sepaitek model does not. If you are replacing an existing drain, match its overflow setup. If the sink has no overflow, choose a no-overflow drain.
Consider the handle and stopper setup
Each product uses a handle to operate the drain stopper from below the sink. This can spare you from reaching into standing water to open the drain. Before buying, consider the space and access under the basin, and check that the handle can be operated where the sink is installed.
Compare materials and included parts
The Phivan listing describes a die-cast brass body with a metal coating. The Sepaitek listings describe a zinc alloy body with a stainless steel stopper, handle, and strainer. The Phivan kit lists a plunger, strainer, flange, and handles; check the product listing to confirm the parts included with the specific option you choose.
Plan for installation and sealing
The Sepaitek installation instructions call for silicone sealant and careful placement of the gaskets and washers. A correct fit and even tightening matter for a secure seal. Review the supplied instructions and confirm you have the needed tools and materials before removing the old drain.
Frequently Asked Questions
What size drain opening do these products fit?
All three are listed for a 3½-inch sink opening. Measure the opening in your sink before ordering, since a drain made for this size will not necessarily fit a smaller opening.
Will these drains connect to a 1½-inch waste pipe?
The Sepaitek listings specify a 2-inch NPT connection and say it will not attach directly to a 1½-inch connection. They note that a reducing adapter is sold separately. Check the Phivan drain outlet and your plumbing dimensions as well before purchase.
Should I choose a drain with or without an overflow?
Match the drain to the sink. Choose an overflow model only if the basin has a compatible overflow opening and channel. For a sink without an overflow, the no-overflow Sepaitek option is the matching configuration.
Can I use one of these drains on every compartment?
Only if each compartment has a compatible opening, overflow setup, and drain connection. Measure and inspect each basin rather than assuming the compartments share the same fittings.
Do the drains include everything needed for installation?
The Phivan listing describes a kit with a plunger, strainer, flange, and handles. The Sepaitek listings describe installation with gaskets and silicone sealant, and note that a reducing adapter for a 1½-inch connection is sold separately. Check the current package details and instructions before installation.
Can I operate the stopper without reaching into the water?
These products use a handle to operate the drain stopper from below the sink. That design lets you control drainage without reaching into standing water, provided the handle is accessible after installation.
Final Recommendation
For a 3 compartment sink, the right drain is the one that matches the opening, plumbing connection, and overflow design of the basin you are replacing. The Phivan is a practical option when you want an overflow and prefer its listed brass body. Choose the Sepaitek no-overflow model for a sink without an overflow, or the overflow version when your basin supports one. Confirm every measurement before ordering.