Moen Soap Dispenser Guide: Models, Fit, and Parts
If you are shopping for a Moen soap dispenser, the most useful first question is not “Which finish do I like?” It is “Which fit profile works at my sink?” Moen’s current product and support documentation shows three especially useful decision groups: the compact 3942, the lower-profile but longer-reach 3944, and several taller S-series designs that share a larger deck-thickness allowance and the same published basic geometry (Moen Incorporated).
Quick answer: choose the 3942 when a 2¾-inch reach and 2¼-inch maximum deck thickness fit your layout; choose the 3944 when you still have a 2¼-inch-or-thinner mounting surface but want more reach; and look first at the S3945/S3946/S3947/S3948/S3949/S3950/S3952/S3955 group when you need up to a 3½-inch deck allowance or want a collection-specific Traditional, Transitional, Modern, Weymouth, Sinema, or Nio look. All of the current product pages reviewed for those three groups use an 18-ounce bottle, and the dimensional differences are more important than capacity (Moen Incorporated).
Which Moen Soap Dispenser Fits Best?
| Decision Profile | 3942 | 3944 | 3½-Inch-Deck S-Series Group* |
|---|---|---|---|
| Bottle capacity | 18 oz. | 18 oz. | 18 oz. |
| Published mounting-hole diameter | 1⅛ in. | 1⅛ in. | 1⅛ in. |
| Maximum deck thickness | 2¼ in. | 2¼ in. | 3½ in. |
| Spout reach | 2.75 in. | 3.63 in. | 3.50 in. |
| Spout height | 3.13 in. | 2.56 in. | 5.00 in. |
| Moen bottle/pump family | 344111 | 344113 | 173490 |
| Most useful reason to choose it | Compact geometry | Longest reach of the reviewed fit groups on a 2¼-in. deck | Thicker-deck allowance plus collection-specific styling |
*“3½-Inch-Deck S-Series Group” is Melissa Vickers Design shorthand for the current S3945, S3946, S3947, S3948, S3949, S3950, S3952, and S3955 models reviewed here. Moen does not present those models as one official product family. Their current product documentation shows the same 18-ounce capacity and the same published 5-inch height, 3.5-inch reach, 3½-inch maximum deck thickness, and 1⅛-inch mounting-hole diameter across the models for which those specifications were verified (Moen Incorporated).
This comparison produces a surprisingly practical result: the taller S-series models do not hold more soap than the smaller 3942 or 3944. In the specifications compared here, their clearest functional difference is the larger 3½-inch deck allowance; much of the remaining choice is design and finish. The 3944, meanwhile, has a slightly longer published reach than the taller S-series group—3.63 inches versus 3.50 inches—despite being much lower above the deck (Moen Incorporated).
The Three Fit Profiles That Matter Most
3942: The Compact Profile
Moen publishes a 3.13-inch spout height, 2.75-inch reach, 2¼-inch maximum deck thickness, 1⅛-inch hole diameter, and 18-ounce refillable bottle for the 3942. If your mounting hole sits reasonably close to the sink bowl and your counter/sink deck falls within that thickness limit, it is the simplest dimensional fit of the three groups (Moen Incorporated).
3944: Lower Height, More Reach
The 3944 is only 2.56 inches high, but its 3.63-inch reach is the longest published reach among the fit groups compared here. It still has the same 2¼-inch maximum deck thickness and 1⅛-inch hole requirement as the 3942. That makes the 3944 particularly interesting when the dispenser hole is farther from the bowl but you do not need the thicker-deck allowance of the taller S-series designs (Moen Incorporated).
S3945, S3946, S3947, S3948, S3949, S3950, S3952, and S3955: Same Basic Fit, Different Design Language
Across the current Moen pages reviewed, these S-series designs use the same basic published fit envelope: 5-inch height, 3.5-inch reach, 3½-inch maximum deck thickness, 1⅛-inch hole diameter, and an 18-ounce refillable bottle. Moen’s product and service documentation places them in the 173490 bottle/pump family (Moen Incorporated).
That means there is little reason to choose one of these S-series models over another for capacity alone. Once the fit works, the meaningful differences are primarily the collection styling and available finishes.
What Changes Among the S-Series Designs?
| Model | Moen Design/Collection Label | What the Choice Mainly Changes |
|---|---|---|
| S3945 | Traditional | Traditional detailing and finish selection |
| S3946 | Transitional | Transitional styling with broad finish availability |
| S3947 | Modern | Modern styling with broad finish availability |
| S3948 | Transitional | Alternate transitional styling |
| S3949 | Weymouth | More decorative traditional/Weymouth styling |
| S3950 | Sinema | Traditional and modern style cues in the Sinema collection |
| S3952 | Nio | Nio/modern styling |
| S3955 | Traditional | Traditional styling with a more limited current finish set |
The key point is not that these products are identical—they are visibly different designs—but that their published fit dimensions and bottle capacity are substantially standardized across the examples reviewed. If you are already committed to a particular Moen faucet collection, the matching dispenser design may therefore be an aesthetic decision rather than a functional upgrade.
Do not confuse the Weymouth S3949 with Moen model 3949. They are separate dispensers with different construction and replacement-part families (Moen Incorporated).
If you are still deciding between faucet brands, see our Moen vs. Delta kitchen faucet comparison before choosing the matching sink accessories.
Check Hole Size, Deck Thickness, and Reach Before Buying
For the current models with full dimensions reviewed here, Moen publishes a 1⅛-inch mounting-hole diameter (Moen Incorporated).
Do not assume that a larger existing opening is automatically acceptable just because the trim looks wide enough to cover it. The product specification establishes the designed hole size; it does not establish compatibility with every larger opening. If your existing hole differs from the published dimension, confirm the exact model before buying rather than treating the trim diameter as a substitute for the mounting specification.
Deck thickness is the second major constraint. The 3942 and 3944 are published for a maximum 2¼-inch deck, while the S-series models reviewed here allow up to 3½ inches (Moen Incorporated). If you have a thick countertop build-up or a mounting location where multiple material layers stack together, that difference can decide the model before finish enters the conversation.
Reach is the third. Measure from the center of the dispenser hole toward the sink bowl and think about where you want the soap to land. A 2.75-inch reach and a 3.63-inch reach can behave very differently at the same sink (Moen Incorporated). If this is part of a larger replacement, our guide to measuring a kitchen sink can help with the broader sink and cabinet dimensions; the accessory-hole geometry still needs its own check.
The bottle sits below the counter even though it refills from above. In a crowded sink base, include that bottle in your planning for under-kitchen-sink storage.
Choose the Finish After the Fit Is Right
Moen sells these dispensers in finish-specific model variants. On current product pages, suffixes such as C (Chrome), BL (Matte Black), SRS (Spot Resist Stainless), BG (Brushed Gold), BLS (Black Stainless), BZG (Bronzed Gold), NL (Polished Nickel), and ORB (Oil Rubbed Bronze) appear on different models (Moen Incorporated).
If the goal is a coordinated faucet-and-dispenser set, use the exact Moen finish designation rather than shopping by a generic description such as “gold,” “black,” or “stainless.” The model suffix is also useful when you later search for the exact product, replacement head, or finish-specific part.
How Moen Soap Dispensers Refill
Moen describes the current standalone models reviewed here as soap/lotion dispensers with an 18-ounce refillable bottle. Refilling is done from above the sink: lift the dispenser head, pour the liquid into the bottle, and reseat the head. You do not need to remove the bottle from inside the cabinet for routine refilling (Moen Incorporated).
Because Moen explicitly markets these products as soap/lotion dispensers, using either liquid soap or lotion is within the product’s stated use. The published refill guidance for the models covered here uses an 18-ounce maximum (Moen Incorporated).
| Step | What to Do | Why It Matters |
|---|---|---|
| 1 | Lift the dispenser head. | Moen’s current standalone dispensers refill from above the sink. |
| 2 | Add liquid soap or lotion. | The models covered here use an 18-ounce bottle; do not overfill. |
| 3 | Reseat the dispenser head. | Push the head back into the base after filling. |
| 4 | If flow weakens, remove and clean the pump/straw. | Moen instructs owners to soak the assembly in warm soapy water. |
| 5 | Prime the pump before reinstalling. | Pump warm water through the assembly, then reseat it. |
What to Do When the Pump Stops Working
When flow weakens, Moen’s published maintenance procedure focuses on the pump/straw assembly. Remove the pump/straw, soak it in warm soapy water until clean, then pump warm water through the assembly to prime it before reinstalling it (Moen Incorporated). If the pump itself is broken, Moen’s replacement instructions describe removing the pump/straw from the dispenser head and installing the correct replacement assembly (Moen Incorporated).
The important ownership lesson is to identify the dispenser before ordering parts. Moen states that its soap-dispenser repair kits are not universally interchangeable (Moen Incorporated).
Replacement Bottles and Pumps: Model Number Matters
| Model/Group | Moen Bottle/Pump Family |
|---|---|
| 3942 | 344111 |
| 3944 | 344113 |
| 3949 (newer standalone model listed by Moen service) | 344113 |
| S3945 / S3946 / S3947 / S3948 / S3949 / S3950 / S3952 / S3955 | 173490 |
Moen’s service library also lists many older and faucet-packaged dispensers with other identifiers. If your dispenser came with a faucet or you do not know its model number, use Moen’s identification library before ordering a bottle or pump rather than assuming that a current 3942, 3944, or S-series kit will fit (Moen Incorporated).
Moen’s service library also lists a newer 3949 standalone dispenser as active from 2025, non-metallic, using an 18-ounce bottle and kit 344113. It is intentionally not folded into the dimensional comparison above because the service-library entry does not provide the same complete installation dimensions there. That is a good example of why model names should not be treated as interchangeable when the evidence is incomplete (Moen Incorporated).
Shopping Options
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Moen Soap Dispenser FAQ
Do Moen Soap Dispensers Refill From the Top?
Yes. The current standalone models reviewed here are designed so the dispenser head lifts off and the bottle is refilled from above the sink (Moen Incorporated).
What Size Hole Does a Moen Soap Dispenser Need?
The current 3942, 3944, S3945, S3946, S3947, S3948, S3949, S3950, S3952, and S3955 product specifications reviewed for this guide use a 1⅛-inch mounting hole. Do not generalize that dimension to every legacy Moen dispenser without checking its own documentation (Moen Incorporated).
Which Moen Soap Dispenser Has the Longest Reach?
Among the current fit groups compared in this guide, the 3944 has the longest published reach at 3.63 inches. The reviewed S-series models are 3.50 inches, and the 3942 is 2.75 inches (Moen Incorporated).
Which Moen Soap Dispenser Works With a Thicker Countertop?
Among the models compared here, the reviewed S-series designs have the largest published maximum deck thickness at 3½ inches. The 3942 and 3944 are published at 2¼ inches maximum (Moen Incorporated).
Can a Moen Soap Dispenser Hold Lotion?
Yes. Moen identifies these products as soap/lotion dispensers, so lotion is within their stated use (Moen Incorporated).
Are Moen Soap Dispenser Bottles and Pumps Interchangeable?
Not universally. Moen specifically warns that its soap-dispenser repair kits are not interchangeable across all styles. The 3942, 3944/3949, and S-series groups discussed above use different bottle/pump families (Moen Incorporated).
How Do I Identify an Older Moen Soap Dispenser?
Moen’s service library provides images, years active, finishes, materials, bottle sizes, replacement-part families, and faucet-package associations for many older models. If you do not know the model number, that identification library is more reliable than choosing a replacement part by appearance alone (Moen Incorporated).
Bottom Line
The best Moen soap dispenser is the one whose geometry fits your sink and whose design coordinates with the faucet—not simply the model with the most finishes or the highest price. The 3942 is the compact option, the 3944 gives you the most reach among the reviewed groups while keeping the 2¼-inch deck limit, and the taller S3945/S3946/S3947/S3948/S3949/S3950/S3952/S3955 designs share a larger 3½-inch deck allowance and a common basic fit profile.
Measure the hole and deck, compare reach, choose the exact Moen finish designation, and record the model number. Those four steps make both the initial purchase and any later pump or bottle replacement much easier.
References
Moen Incorporated. How to fill a soap dispenser. Moen Solutions. https://solutions.moen.com/Article_Library/How_to_Fill_a_Soap_Dispenser
Moen Incorporated. How to replace a soap dispenser pump. Moen Solutions. https://solutions.moen.com/Article_Library/How_to_Replace_a_Soap_Dispenser_Pump
Moen Incorporated. Modern soap dispenser soap/lotion dispensers: S3947 series. https://shop.moen.com/products/s3947c
Moen Incorporated. Moen soap dispenser soap/lotion dispensers: 3942 series. https://shop.moen.com/products/3942
Moen Incorporated. Nio soap dispenser: S3952 series. https://shop.moen.com/products/s3952c
Moen Incorporated. Sinema soap dispenser: S3950 series. https://shop.moen.com/products/s3950c
Moen Incorporated. Soap dispenser care and cleaning. Moen Solutions. https://solutions.moen.com/Article_Library/Soap_Dispenser_Care_and_Cleaning
Moen Incorporated. Soap dispenser: 3944 series. https://shop.moen.com/products/3944
Moen Incorporated. Soap dispensers. Moen Solutions. https://solutions.moen.com/Article_Library/Soap_Dispensers
Moen Incorporated. Traditional soap dispenser: S3945 series. https://shop.moen.com/products/s3945
Moen Incorporated. Traditional soap/lotion dispensers: S3955 series. https://shop.moen.com/products/s3955c
Moen Incorporated. Transitional deck-mounted soap/lotion dispensers: S3946 series. https://shop.moen.com/products/s3946c
Moen Incorporated. Transitional soap dispenser: S3948 series. https://shop.moen.com/products/s3948c
Moen Incorporated. Weymouth soap dispenser: S3949 series. https://shop.moen.com/products/s3949c