Beneke Toilet Seat Company: Replacing Your Seat

Beneke is a toilet-seat brand name rather than the maker of the porcelain toilet bowl. Beneke-labeled plastic seats sold through plumbing suppliers are associated with Bemis Co., and some older Beneke models are discontinued or available only through remaining distributor stock.

You do not need to find an exact Beneke replacement. In most cases, you can replace the old seat with a new seat that matches your toilet bowl’s shape, mounting-hole layout, and needed features.

What the Beneke Name Means

Beneke appears on basic plastic toilet seats, including elongated seats and slow-close models. The name may be on the seat, hinge, packaging, or a product listing, but it does not identify the manufacturer of the toilet itself.

A toilet seat may have features such as:

Polypropylene plastic construction
Elongated-bowl fit
Top-mount hinges
Non-corrosive bolts
Fixed bumpers under the seat
Gentle-close or slow-close hinges

For example, Beneke model I11600E is an elongated polypropylene seat with gentle-close hinges. It is designed to close quietly when the seat is tapped forward rather than dropped.

Another Beneke product number, 500TMA 000, is an elongated plastic seat that has been listed as discontinued. If you have that seat, a current elongated plastic seat is usually the practical replacement rather than a search for old stock.

Identify Your Existing Beneke Toilet Seat

Before buying anything, identify the seat style and the toilet bowl shape. A seat that looks close can still fit poorly if its front shape or mounting points do not match the bowl.

Check the Bowl Shape

Look at the bowl from above with the lid raised.

Elongated bowls are longer and more oval from the mounting holes to the front rim.
Round bowls have a shorter, more circular front.
Specialty bowls may have unusual contours, a narrow front, a square shape, or a built-in bidet function.

“Elongated” on a Beneke seat identifies its intended fixture style. A shifted, cracked, or poorly fitting old seat can be misleading.

Inspect the Hinge Area

Lift the hinge covers, if present, and look at how the seat is fastened.

Common setups include:

Bolts passing through holes in the toilet rim with nuts underneath
Top-mount hardware tightened from above
Plastic bolts and nuts
Metal bolts with plastic or metal nuts
Slow-close hinge assemblies that may use proprietary hardware

Write down any molded name, part number, or hinge marking before removing the seat. A product number such as I11600E can help you identify its original features, even if you choose a different replacement brand.

Note the Features You Want to Keep

Decide whether the old seat’s features are worth replacing like-for-like. A plain plastic seat is easy to replace. A slow-close seat, quick-release seat, raised seat, child-training seat, or bidet seat may need a more specific replacement.

Choose a Replacement for a Beneke Seat

Use this quick comparison before shopping. Bring your measurements, a photo of the bowl and hinge area, or the old seat to the store if possible.

What You Have	What to Buy	What to Check
Elongated Beneke plastic seat	Elongated replacement toilet seat	Bowl shape, bolt-hole placement, seat length
Round toilet seat	Round replacement toilet seat	Bowl shape and mounting-hole placement
Beneke gentle-close seat	Slow-close replacement seat	Whether you want a similar quiet-close hinge
Seat with top-mount hardware	Top-mount-compatible seat or adaptable replacement	Access around the mounting holes
Loose, rusted, or broken bolts	New seat with a bolt kit	Bolt style and whether nuts are accessible below
Cracked or badly stained seat	Any correctly fitted replacement	Bowl shape and desired material

When comparing seats, measure and record:

The distance from the center of each mounting hole to the front of the bowl.
The distance between the mounting holes.
The bowl’s widest point.
Whether the front of the bowl is round or elongated.
Whether your bolts tighten from below or from above.

A plastic replacement is usually the closest match for a Beneke plastic seat. It is lightweight, easy to clean, and less likely than painted wood to show damage from moisture around the hinge area.

How to Replace a Beneke Toilet Seat

Stop and get help if the porcelain is cracked, the toilet is loose at the floor, or water is leaking from the tank or bowl.

Step 1: Gather the New Seat and Basic Tools

You will usually need the replacement seat and the hardware included with it. A screwdriver, adjustable pliers, and a small cleaning cloth are useful for most installations.

If the old bolts are rusted, stripped, or missing parts, buy a compatible toilet seat bolt kit with the new seat. I use a toilet seat bolt kit rather than trying to reuse worn hardware, because new bolts and nuts make it easier to keep the seat centered and tight.

Step 2: Open the Hinge Covers

Raise the seat and lid. Look at the back hinge area where the seat attaches to the toilet.

Many seats have small plastic caps over the bolt heads. Lift or pry those caps open gently with your fingers or a flat screwdriver. Avoid forcing the hinge cover, especially on older plastic seats, because it can snap.

If bolts extend below the toilet rim, you will also need to reach the nuts from underneath.

Step 3: Remove the Old Bolts and Seat

Hold the nut underneath the toilet rim with pliers if it turns with the bolt. Turn the bolt head counterclockwise with a screwdriver until the bolt comes free.

Remove both bolts, then lift the old seat and lid away from the toilet.

Plastic hardware can often be cut or broken away carefully if it has become brittle. Do not force a seized metal bolt against the porcelain. A stubborn metal fastener can crack the toilet rim or damage the mounting hole; use a fixture-repair professional if it cannot be removed without excessive force.

Step 4: Clean the Mounting Area

Wipe the flat mounting surface around both holes, including the area that was covered by the old hinges. Remove grime, dried cleaner, and loose debris so the new hinges sit flat.

Check the rim closely for hairline cracks, chips around the holes, or movement in the bowl. A replacement seat should not be installed on damaged porcelain until the toilet has been evaluated and repaired.

Step 5: Install and Align the New Seat

Set the new seat’s hinges over the mounting holes. Insert the new bolts through the hinge openings and toilet holes.

Thread the nuts onto the bolts by hand. Keep them loose enough to slide the seat slightly while you center it on the bowl. Close the seat and lid, then check that:

The seat is centered from side to side.
The front of the seat follows the bowl rim.
The lid rests properly without rubbing the tank or wall.
The bumpers contact the bowl evenly.

Once it is positioned correctly, tighten both fasteners gradually, alternating from one side to the other. Tighten until the seat no longer shifts, but do not overtighten plastic hardware or put heavy pressure on the porcelain.

Close the hinge covers, if included, and test the seat by sitting gently and moving it side to side. It should stay centered and feel stable.

When an Exact Beneke Replacement Makes Sense

An exact replacement is most useful when the seat has a feature you specifically want to preserve.

Consider the features you want to preserve:

A commercial restroom fixture with a particular seat profile
A slow-close hinge that matches other bathrooms in the building
A specialty color that needs to match the toilet
Top-mount hardware where access below the bowl is limited
A seat that fits an unusual fixture better than common retail models

For most standard household toilets, a seat from a well-supported manufacturer is easier to find, and replacement hardware is easier to obtain later.

Choose a slow-close replacement seat if you want that feature. Slow-close hinges reduce lid slamming, but they do not correct a seat that is too short, too long, or mounted off-center.

Confirm the New Seat Fits and Stays Secure

After installation, use this short check before throwing away the packaging or old hardware:

Open and close the lid several times.
Sit on the closed seat carefully and check for shifting.
Make sure the seat does not slide left or right.
Confirm both bumpers touch the bowl.
Check that the lid does not strike the tank, wall, or flush handle.
Recheck the mounting bolts if the seat begins to loosen after normal use.

Clean plastic seats with a mild bathroom cleaner and a soft cloth. Avoid harsh abrasives on plastic hinges and bumpers, which can leave scratches and make grime harder to remove.

If a new seat repeatedly comes loose, remove it, inspect the bolts and mounting holes, then reinstall it with new compatible hardware. Persistent looseness can also mean the replacement seat does not suit the bowl’s mounting arrangement.

Frequently Asked Questions

Who makes Beneke toilet seats?

Beneke toilet seats are associated with Bemis Co. in plumbing-supply listings. Beneke appears to be a seat brand or product line, not the maker of the toilet bowl itself.

Is Beneke still making toilet seats?

Some Beneke seats can still appear through plumbing suppliers, but certain older models are discontinued and may be limited to remaining inventory. A current replacement seat matched to the bowl shape is usually easier to buy than an exact old Beneke model.

How do I buy the correct toilet seat?

Measure the bowl from the mounting holes to the front rim, measure the distance between mounting holes, and identify whether the bowl is round or elongated. Choose a seat made for that bowl shape, then confirm the new seat’s mounting hardware will work with your toilet.

How do I remove a Beneke toilet seat?

Open the hinge covers, loosen the two mounting bolts, hold the nuts underneath if necessary, and lift the seat away once both bolts are removed. If a metal bolt is seized, do not force it against the porcelain; replaceable plastic hardware can often be removed more safely than corroded metal hardware.

Can I replace a Beneke seat with a bidet toilet seat?

Yes, if the bidet seat is made for your toilet’s bowl shape and mounting-hole arrangement. Bidet seats may also need access to a water connection and, for powered models, a properly located electrical outlet; do not alter plumbing or electrical wiring if you are unsure.