From faucet model to order line
Why is the cartridge alone not enough to identify the kit?
A cartridge does not identify the kit because one maker’s kits can share a cartridge and still differ in the part that holds it. Moen’s kit comparison says its 1255, 150257 and 160657 cartridge service kits share the same cartridge, handle screw and hex wrench.
The cartridge nuts differ, and Moen says they are not interchangeable, so the owner has to identify which one the faucet uses.
Moen limits the comparison to its one-handle faucets installed after 2009 with flexible braided supply lines. It is one maker’s example, not a rule for other brands.
| Moen kit | Nut shape | Nut material |
|---|---|---|
| 1255 | Hexagonal | Non-metallic, black |
| 150257 | Hexagonal | Brass |
| 160657 | Two flat sides | Non-metallic, black |
How do you identify the faucet before its parts?
Find the faucet’s model number first, then read the service kit from the maker’s parts list, as Moen and Kohler describe for their own products.
- Check the paperwork. Moen names invoices, installation sheets and the product box.
- Check the product. Kohler says its model number may be stamped on the product.
- If no number is found, try a photo tool such as Moen’s Faucet Finder or Kohler’s Scout app.
- Open the parts diagram for that model. Kohler places it under Installation and Service Parts on the product page.
- Read off the kit. Moen says to search the model on its site and view the replacement parts.
- Compare the physical parts last, following the maker’s instructions.
Moen’s bathroom cartridge guide offers a second route: it identifies the cartridge of its one- and two-handle bathroom faucets by handle operation and visual identification.
What changes between faucet generations?
In Moen’s bathroom range, the cartridge and its retainer change with the production period. Its bathroom cartridge guide lists each single-handle cartridge with its retainer and introduction date.
| Moen cartridge | Retainer | Introduced |
|---|---|---|
| 1225 | U-shaped copper clip | 1981 |
| 1255, 160657, 150257 | Retainer nut (variety) | After 2009 |
| 202233, 212555 | Hexagonal non-metallic black nut | 2021 and 2023 |
| 1269 | Hexagonal non-metallic black nut | 2025 |
The guide also gives handle rotation and handle screw location for each row. Three of the four rows in this table name a nut, so the retainer type alone does not settle the generation.
How do makers identify the product and find the parts list?
Each maker publishes its own route from product to part. The table records five makers on their own products.
| Maker | How the product is identified | Parts lookup |
|---|---|---|
| Moen | Model number from invoices, installation sheets or the product box | Model search on its site; photo-based Faucet Finder |
| Kohler | Model number on packaging, literature, specification sheets; may be stamped on the product | Parts diagram on the product page; Scout photo app (beta) |
| hansgrohe | Article number laser engraved in a visible place on the finish | Exploded view with numbered components |
| GROHE, UK site | Product name typed into its finder | Spare Part Finder; app that scans the product |
| Delta | Model number typed into its Know Your Model box; a wizard if unknown | Parts Diagram document, occasionally the installation instructions |
Delta adds that some older models are not on its site. Ask any other supplier where its model number is marked and which document lists the service parts.
What is in a service kit besides the cartridge?
A kit can hold fixings and tools as well as the cartridge. Two Moen kits show this, and a third Moen page leaves it open:
Moen 1255, 150257, 160657
The three kits share a cartridge, handle screw and hex wrench and differ by cartridge nut.
Moen 202233
Moen’s replacement steps have the old cartridge nut discarded and a new one threaded in. The page does not say whether the new nut comes in the kit. The tool it names is the one supplied with the faucet; a 22 mm socket is the alternative.
Moen 1225
Moen’s 1225 steps use a plastic twisting tool that it says is provided in the 1225 cartridge kit. A copper retainer clip holds this cartridge. Put these on the order line:
- Faucet model and production period
- Kit number as the maker lists it
- Cartridge reference
- Retaining nut or clip
- Screws and tools the kit list names
- Service instruction reference
When do makers say parts are interchangeable?
Moen states interchangeability for named parts and Chicago Faucets for most of its range, and the statements point both ways. Four examples:
Not interchangeable
Moen says the cartridge nuts of its 1255, 150257 and 160657 kits are not interchangeable.
Interchangeable
Moen’s kitchen cartridge guide says its 40002 cartridge is interchangeable with its 4000 cartridge. That is a kitchen-faucet statement.
Mostly interchangeable
Chicago Faucets says most of its cartridges are completely interchangeable. The statement covers its own range and says most, not all.
Variants in one range
Chicago Faucets’ repair guide gives right-hand and left-hand cartridges separate part numbers, and its cold ceramic cartridge has a blue seat, the hot one a red seat. Its brochure lists short-stem cartridges for exposed caps and long-stem cartridges for concealed caps.
A cartridge can also carry a function: Chicago Faucets says its XKC cartridges prevent cross-flow with a check valve inside the cartridge. Treat interchangeability as a written statement from the maker of that faucet.
What do makers say about the repair and parts supply?
Moen’s 1255 instructions start with the water off, and GROHE and hansgrohe word their spare-part availability differently. The table records each source’s own statement.
| Source | What it says |
|---|---|
| Moen, 1255 steps | Supply shut-off valves must be turned off; cleaning and flushing the valve body before fitting the new cartridge is recommended. |
| GROHE, UK spare parts guide | Guarantees spare-part availability for at least 10 years after a product is discontinued. |
| hansgrohe | States long-term spare-part availability for its faucets; the page gives no number of years. |
| US EPA, Fix a Leak Week | Old and worn faucet washers and gaskets frequently cause leaks; one drip per second can waste more than 3,000 gallons a year. |
How should a buyer order cartridge spares?
Order from the faucet outwards. These steps are procurement guidance, not a repair procedure.
- Record the faucet. Model number, purchase or installation record and how the handle operates.
- Check every batch. In repeated rooms, do not assume identical-looking faucets are one generation.
- Ask for the kit, not a size. Request the service kit the maker lists for that model.
- List the contents. Cartridge, retaining nut or clip, screws and tools.
- Get interchangeability in writing. Ask which kits or parts the maker treats as interchangeable.
- Ask for the instructions. Use the maker’s procedure, with the water supply shut off.
- File the record. Keep the part mapping and kit label with the maintenance log.
When a superseding kit number is offered
A new number can be valid, but it needs a documented mapping. Ask what the new kit replaces and which companion parts change. Moen’s 202233 steps show a nut being replaced together with the cartridge.
What should you send and ask before a quotation?
A complete request names the faucet and the whole kit, not just a cartridge.
| Question | Why it matters |
|---|---|
| Which service kit is listed for this faucet model? | Kits can share a cartridge and still differ. |
| What exactly does the kit contain? | Nut, clip, screw and tools may or may not be included. |
| Which production period does it fit? | In Moen’s range the cartridge and its retainer change by date. |
| Is any other kit interchangeable with it? | Each maker states it for its own parts. |
| Does the cartridge carry another function? | One maker builds in a check valve. |
| How long are the parts supplied? | GROHE and hansgrohe word it differently. |
Include with your request
- Faucet model number or clear photos
- Purchase or installation record
- Handle type and how it operates
- Number of faucets per batch
- Spare quantity wanted
WNS Global confirms any product and terms it offers separately in writing. This guide does not state that WNS Global products use any cartridge, kit, nut or tool named above, or that any named part fits them.
