WOWOW Faucets
If you’ve ever stood at a leaky kitchen sink with a worn-out ceramic disc in your hand, you already know the pain: finding the right Kohler faucet parts replacement catalog is half the repair. Kohler has manufactured hundreds of faucet families since the 1970s — Forte, Devonshire, Bellera, Simplice, Artifacts, Purist, Coralais, and dozens more — and each family uses slightly different cartridges, valve bodies, and trim. Grabbing the wrong part means a second trip to the hardware store, or worse, a stripped stem. This guide walks you through exactly how to read Kohler’s catalog system, how to identify your faucet when the model number is missing, and which parts you should keep on hand if your home runs on a Kohler-heavy plumbing setup.
I’ve been repairing residential faucets professionally for over a decade, and roughly 4 out of 10 service calls involve sourcing the correct replacement part for a Kohler unit. The good news: Kohler’s documentation is excellent compared to most manufacturers. The bad news: the catalog is huge, and the search tools assume you already know your model number. Let’s fix that.
How Do I Find My Kohler Faucet Model Number When It’s Not on the Faucet?
Look in four places, in this order: the underside of the spout base, the underside of the sink near the supply lines, the original purchase paperwork or installation manual, and the inside of the cabinet door (where many plumbers tape a sticker). The model number on Kohler faucets is usually a “K-” prefix followed by 3 to 5 digits — for example K-560, K-72218, or K-99259-CP.
If none of those spots reveal a number, you have two backup methods. First, take a clear photo of the faucet from three angles (front, side, base) and upload it to Kohler’s customer service chat — their reps can usually identify the family within a few minutes. Second, measure the spout reach, handle style, and hole configuration (single hole, 3-hole 4-inch centerset, 3-hole 8-inch widespread) and cross-reference Kohler’s “Discontinued Products” archive, which still hosts diagrams going back to 1995.
One tip from the field: Kohler’s “K-” number is the trim model. The valve body underneath often has a separate part number (Rite-Temp, MasterShower, HiFlow), and you need both when ordering shower repair parts. Kitchen faucets are simpler — the K-number alone usually pulls up everything you need.
What if my faucet was installed by a previous homeowner and I have nothing to go on?
Take the cartridge out and bring it to a plumbing supply house. The cartridge is the single most distinctive part — Kohler uses proprietary geometries on most cartridges (the GP1011875, GP76851, and Mixer cartridge are the three most common), and a counter clerk who handles Kohler regularly can match it on sight. If you’d rather not pull the cartridge before you have a replacement in hand, photograph the handle base and trim ring; Kohler’s exterior styling is fairly distinctive and most experienced plumbers can name the family within 30 seconds.
What’s Actually Inside the Kohler Faucet Parts Replacement Catalog?
The catalog is organized in three layers: faucet family (e.g., Simplice), then specific model variant (e.g., K-647-CP polished chrome), then exploded service diagram showing every individual part with its own GP- or 1- prefixed part number. Each diagram lists roughly 15 to 40 individual components, but in practice you’ll only ever replace 5 or 6 of them.
Here’s what’s typically broken out in a Kohler service diagram:
- Cartridge or valve assembly — the most common wear part, controls flow and temperature
- O-rings and gaskets — fail every 5-10 years, cause base leaks
- Aerator and flow restrictor — calcium-clogged or stripped threads
- Spray head and hose (pull-down/pull-out models) — hose splits or magnetic dock weakens
- Handle, handle screw, and set screw — strip out from over-tightening
- Escutcheon, deck plate, and mounting hardware
- Diverter (on faucets with sprayers or pot fillers)
- Check valves on pull-down models to prevent backflow
Kohler differentiates between “service parts” (sold individually for repair) and “trim kits” (sold as cosmetic upgrade bundles). For repair, you almost always want service parts — they’re cheaper and ship faster. The Kohler faucet parts replacement catalog flags warranty-covered items with a small icon next to the part number; if you see that flag and your faucet is under 5 years old, call before you buy.
Which Kohler Faucet Parts Fail Most Often, and Which Should I Stock?
Ceramic disc cartridges, aerators, and O-rings account for roughly 80% of Kohler faucet repairs in my experience. If your home has multiple Kohler faucets, keep one universal O-ring kit, one aerator (with the wrench), and the specific cartridge for your most-used kitchen faucet in a drawer — you’ll save a Saturday trip every couple of years.
Here’s a comparison of the most common Kohler service parts, what they cost, and how often they actually fail:
| Part | Kohler Part Family | Typical Lifespan | Approx. Replacement Cost | DIY Difficulty |
|---|---|---|---|---|
| Ceramic disc cartridge (kitchen, single-handle) | GP1011875 / GP76851 | 8–15 years | $25–$55 | Easy (15 min) |
| Mixer cartridge (lavatory) | GP1059291 / 1006669 | 10–15 years | $30–$60 | Easy (15 min) |
| Rite-Temp pressure-balance valve (shower) | GP500520 | 10–20 years | $40–$90 | Moderate (45 min) |
| O-ring repair kit | GP30420 / GP1059293 | 5–10 years | $8–$15 | Easy (10 min) |
| Aerator (kitchen) | 1233520 (varies by finish) | 3–7 years | $10–$25 | Very easy (5 min) |
| Pull-down spray hose | 1045764 / 1052308 | 5–10 years | $25–$70 | Easy (20 min) |
| Handle set screw + Allen key | varies (1011723) | 15+ years | $3–$8 | Very easy (5 min) |
One thing worth noting: hard water dramatically shortens cartridge and aerator life. If your home has water hardness above 7 grains per gallon, expect to replace the aerator every 2-3 years and the cartridge about 30% sooner than the table above suggests. A whole-house water softener or even a faucet-mounted filter on your worst-affected sink can double those numbers. We’ve written about cleaning limescale off faucet bases in detail — the same buildup that clouds your chrome is silently grinding away at your cartridge ceramic.
How do I know if my cartridge is actually the problem and not just an O-ring?
Two quick tests. First, if water drips from the spout when the handle is fully off, it’s the cartridge — O-rings can’t cause spout drip on a ceramic-disc faucet. Second, if water leaks from around the base of the handle or the spout swivel when you turn it on, it’s almost always an O-ring. Cartridge replacements are slightly more involved (you’ll need to depressurize the supply lines), but both repairs take well under an hour. Our step-by-step O-ring repair guide walks through the process for any single- or double-handle faucet.
How Do I Order Kohler Parts Step-by-Step From the Catalog?
The fastest path: go to kohler.com, click “Customer Care” then “Find Service Parts,” type your K-number into the search box, and click the exploded diagram. Hover over the part you need to see the part number, then click “Add to Cart.” For older or discontinued models, scroll past the search results to “Discontinued Products” and search again — most parts going back to the mid-1990s are still stocked.
Here’s the workflow I use on service calls:
- Identify the model number (K-prefix) using the four locations listed above.
- Confirm finish code — Kohler appends a 2-character code to the K-number for finish (-CP polished chrome, -VS vibrant stainless, -BN brushed nickel, -2BZ oil-rubbed bronze). Aerators and trim must match.
- Open the exploded diagram on Kohler’s site and identify the specific numbered call-out for the part you need.
- Cross-reference the GP- or 1- part number on a second source (Amazon, Build.com, plumbing supply house) to compare price and shipping speed — Kohler direct is reliable but often slower.
- Check warranty status — Kohler offers a lifetime limited warranty on most residential faucets covering finish and function. If yours qualifies, the part may ship free.
- Order one backup O-ring kit with any cartridge purchase. The seals around the cartridge body are not always included.
If you’re staring at a faucet that pre-dates Kohler’s online catalog (typically pre-1998), you can still call Kohler’s customer service line directly with a description and they’ll often mail you a paper schematic. Their phone reps have access to archival diagrams that aren’t on the public website.
What About Kohler Faucet Parts From Third-Party Sellers — Are They Safe?
Genuine Kohler parts from authorized sellers are safe and often cheaper than ordering direct. Aftermarket “compatible” parts are a gamble — they fit dimensionally about 70% of the time, but the ceramic quality and O-ring durometer often differ enough that they fail in 2-3 years instead of 10. For cartridges specifically, I always recommend OEM. For aerators and O-rings, aftermarket is usually fine.
The authorized aftermarket sellers I trust are Build.com, Ferguson, SupplyHouse, and Amazon’s “Sold by Kohler” listings (look for the explicit Kohler seller name, not a third-party reseller using Kohler imagery). Avoid no-name eBay cartridge listings priced 60% below retail — those are almost always counterfeit Chinese ceramic discs with a fraction of the cycle life.
If you’re comparing OEM faucet quality to budget alternatives more broadly, our breakdown of imported vs local faucets and the related hidden problems with low-quality faucets covers what to expect from the cheaper end of the market — and why a $12 counterfeit cartridge can end up costing you a $400 water-damage repair.
Can I use a non-Kohler cartridge in a Kohler faucet?
Sometimes — but only with specific universal-fit cartridges from Danco, BrassCraft, or LASCO that explicitly list your Kohler model number as compatible. Even then, expect a slightly different handle “feel” (the indexing splines on the stem may rotate a few degrees differently, which changes the handle position relative to hot/cold). If you only have one Kohler faucet and don’t care about resale uniformity, this can save you 40%. If you have a matched kitchen and bar suite, stay OEM.
What If My Faucet Is From the Wowow or Another Brand — Can I Still Use the Kohler Catalog Approach?
The model-number-to-exploded-diagram workflow works for nearly every reputable faucet brand, including ours. Most brands publish service diagrams under a “Care” or “Support” section on their site. The trick is knowing which part is universal and which is proprietary: aerators, supply lines, and most O-rings are largely interchangeable across brands of the same era; cartridges, valve bodies, and finish trim are almost always brand-specific.
When you can’t find your model online, the universal-parts approach saves the day. A standard 15/16″-27 male aerator thread or 55/64″-27 female thread will fit roughly 85% of kitchen faucets sold in North America since 2000. Universal ceramic disc cartridges with adjustable splines fit a smaller but still meaningful slice. For shower repairs, however, branded cartridges are essentially mandatory — pressure-balance valves are tuned to specific cartridge geometries for scald protection, and ANSI A112.18.1 certification depends on using the manufacturer’s matched part.
A few related repair scenarios we cover in depth: tightening a loose bathroom faucet handle is often a 30-second set-screw fix rather than a full cartridge replacement, and a new faucet that still leaks usually points to a missed gasket during installation rather than a defective part.
How Long Should a Kohler Faucet Last Before I’m Replacing Parts Constantly?
A Kohler kitchen or bathroom faucet should run 15-25 years with one cartridge swap and 2-3 aerator cleanings or replacements. If you’re replacing parts more than once every 5 years on a single faucet, something is wrong — either water quality (hardness, sediment, low pH), installation (over-tightened mounting, kinked supply lines), or you’ve got a counterfeit unit. Genuine Kohler residential faucets meet ASME A112.18.1/CSA B125.1 standards and are typically tested to 500,000 cycle minimum on the cartridge.
The lifetime limited warranty on most Kohler residential faucets covers leaks, drips, and finish defects for as long as you own the home. It doesn’t cover wear-out parts like aerators or labor, but it absolutely covers cartridges that fail prematurely. Keep your proof of purchase or installation date — Kohler will often honor the warranty just with a phone call if you can describe when and where you bought it.
FAQ
Where exactly is the model number on a Kohler kitchen faucet?
Most commonly under the spout, etched into the brass collar where the spout meets the deck. If it’s worn off, check the original box, the installation card (often inside the cabinet door), the warranty registration email, or the underside of the deck plate. The format is “K-” followed by 3-5 digits and sometimes a finish suffix like “-CP” or “-VS.”
Does Kohler still sell parts for faucets from the 1990s and 2000s?
Yes, for the vast majority of models. Kohler maintains one of the longest service-parts windows in the industry — typically 25+ years for residential faucets. Search the “Discontinued Products” section of their customer care site, or call them directly with your old model number. Even when a specific part is out of stock, they usually have a documented superseding part number that fits.
Can I replace a Kohler cartridge myself or do I need a plumber?
You can absolutely do it yourself on most single-handle kitchen and bathroom faucets — the job takes 15 to 30 minutes with basic tools (Allen key, adjustable wrench, needle-nose pliers). Shut off both supply valves under the sink first, drain the line by opening the faucet, then remove the handle screw, lift the handle, unscrew the retaining nut or remove the retaining clip, and pull the cartridge straight up. For shower valves, a plumber may be worth the cost because access is tighter and a wrong move can damage the in-wall valve body.
Why does my new Kohler cartridge still drip?
Three usual culprits. First, the retaining nut isn’t fully seated — re-tighten by hand plus a quarter turn with a wrench. Second, a piece of debris (mineral fragment or pipe scale) is caught on the ceramic disc — pull the cartridge, rinse it, reinstall. Third, you got a counterfeit or defective cartridge — verify the seller and consider returning. If everything looks correct and it still drips, run a flush: remove the cartridge, turn on the supply briefly to blow out any pipe debris, then reinstall.
Are Kohler shower valve cartridges interchangeable across different shower trims?
Within the same valve family, yes. Kohler’s Rite-Temp pressure-balance valve uses the same GP500520 cartridge across dozens of trim styles, so you can repair a 20-year-old Devonshire shower with the exact same cartridge as a brand-new Artifacts. The trim (handle, escutcheon, showerhead) is cosmetic and totally separate. Other Kohler valve families (HiFlow, MasterShower, thermostatic) use their own specific cartridges — check your valve body, not just the trim.
What’s the difference between a Kohler “service part” and a “trim kit”?
A service part is an individual repair component (single cartridge, single O-ring, single aerator) sold to fix a broken faucet. A trim kit is a cosmetic upgrade — a new handle, escutcheon, and showerhead set in a different finish, designed to refresh an existing valve body without re-piping. For repair, you want service parts. For a remodel where the in-wall plumbing is staying but you want a new look, trim kits are the answer.
How much should I budget for a complete Kohler faucet rebuild?
For a kitchen faucet rebuild including new cartridge, full O-ring kit, fresh aerator, and a new pull-down spray hose, expect $80-$180 in parts. For a bathroom lavatory faucet, $40-$90. For a shower including Rite-Temp cartridge and new trim seals, $60-$130. These numbers assume genuine Kohler OEM parts purchased through authorized sellers. Add roughly $150-$300 for professional labor if you’re not doing it yourself.
About the Author: This guide was prepared by the Wowow Faucet technical content team, which includes licensed plumbers and product engineers with combined experience servicing residential plumbing fixtures across North American homes for over 15 years. We test cartridges, finishes, and valve assemblies against ASME A112.18.1/CSA B125.1 and NSF/ANSI 61 standards in our own QA lab, and our retail faucets ship with a limited lifetime warranty on cartridges and finishes. While this article focuses on identifying Kohler-brand parts, the same identification, ordering, and repair principles apply across major faucet brands — including our own Wowow lineup, where we maintain a full searchable parts diagram for every model sold since 2018.
