How to Identify Your Shower Valve and Cartridge (Moen, Delta, Kohler) [2026]

Knowing how to identify your shower valve and cartridge before you buy anything is the difference between a 20-minute repair and two hardware-store trips. The wrong cartridge almost fits — wrong seal, wrong stem, same frustrating result. Most homeowners don’t know their shower valve brand until the shower starts dripping or won’t regulate temperature. By then, they need the right part fast.

Almost every residential shower valve was made by one of five brands: Moen, Delta, Kohler, Pfister, or American Standard. Each uses a cartridge that is not cross-compatible with the others — and within each brand, different valve generations use different cartridges. This guide walks through seven inspection points (starting with the visible trim, working inward), brand-specific visual cues once the cartridge is out, manufacturer lookup tools for each brand, and a clear decision tree for when nothing is marked.

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How to Identify Your Shower Valve: Start With What’s Visible

The fastest identification path doesn’t require shutting off the water. Start with the outside trim — the escutcheon plate, handle cap, and handle face — because the brand clue you need is usually there before any disassembly.

Every major manufacturer has built their parts workflow around the model number: Delta routes homeowners to the product detail page listing parts once the model is known; Kohler says identify the product, view the parts diagram, select the genuine part; Pfister routes through the packaging, instruction manual, filtered product search, or parts diagram before selecting a cartridge. The consistent message is that one visible model number or brand name saves more time than any workaround.

If the brand name is readable on the trim, go directly to that brand’s lookup tool (links in the section below). If it isn’t visible, work through the seven locations below in order — each one is faster than the next.

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The 7 Places to Find Brand and Model Markings

Place 1 — Handle face, handle cap, or handle button. Many shower trims carry a brand mark on the handle assembly even when the escutcheon plate is plain. Delta’s parts path treats handle issues separately from cartridges, which is a signal that the handle is worth photographing before removal. Pfister navigation separates “Handle Options” from “Tub & Shower Trim Kits,” so a Pfister handle style can identify the trim family even when the in-wall valve still needs its own confirmation.

Place 2 — The escutcheon plate. Inspect the lower rim, the area around temperature markings, and any etched symbol near the handle opening. A fixture may carry only a small emblem — a circle with lines, a stylized letter — rather than a printed brand name. Treat any symbol as evidence, photograph it straight-on before polishing or disassembly, and search the description (“circle two lines shower faucet brand”) to find the manufacturer.

Place 3 — Under the escutcheon after removing handle and trim plate. Rough-in valves and trim adapters may expose cast marks, screw patterns, retaining clip designs, or cartridge-retaining hardware that identify the brand and generation. Kohler says model information can be stamped directly on the product, and Pfister says after identifying the faucet, the homeowner should open “Installation & Support” and use the parts diagram to select the cartridge.

Place 4 — Cartridge stem and body. This requires shutting off the water and removing the handle — it’s a later step, but the cartridge body often carries the most reliable ID. Moen’s 1222, 1225, and 1213 cartridges each bear their official model number. Delta’s RP46074 body carries the part number in stamped form. Kohler GP-series cartridges often have the KOHLER brand, a “COLD” orientation mark, and the part number all molded into the plastic body.

Place 5 — Original paperwork, packaging, or spec sheet. Kohler explicitly lists product packaging, literature, specification sheets, and stamped product markings as model-number sources. Pfister says the product model number is usually an eight-character code such as F-529-7AYY, displayed on the product package and instruction manual below the product name. If you have the original documentation, this is the most reliable method — no disassembly required.

Place 6 — Matching fixtures in the same bathroom. If the shower was installed as part of a coordinated bath suite, a sink faucet or tub spout from the same collection can confirm the brand — though not the shower valve’s specific generation or cartridge number. Use it as a brand clue, then verify with the valve’s own markings.

Place 7 — Cartridge packaging from a previous repair. Old receipts and cartridge packaging carry model numbers and retailer SKUs. The Home Depot listing for the Delta RP46074 shows the internet number, model number, and store SKU together — any one of those can reorder the same part. Note that some Pfister cartridges have been discontinued and superseded — the 974-0420 was replaced by a new part number — so an old package may require a cross-reference to confirm the current replacement.

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Visual ID by Brand — What Each Shower Cartridge Looks Like

Once you have eyes on the cartridge, these visual signatures distinguish the major families before you even read a label.

Moen has three primary shower cartridges that look distinctly different from one another. The Moen 1222 Posi-Temp is a shorter white plastic single-handle cartridge with a brass stem and a black side seal area. The Moen 1225 is a longer, white cylindrical body — noticeably taller than the 1222 — with black sealing bands along the body and a brass stem. The Moen 1213 M-CORE is the standout: a blue cartridge body, gray housing pieces, and a brass-colored stem. M-CORE is a different valve system designed for faster installation, so M-CORE trim should not be assumed to use the same cartridges as older Posi-Temp or one-handle Moen valves.

Delta: The RP46074 is the MultiChoice Universal 13/14 Series cartridge — a gray-and-white body with two lower inlet legs and a brass stem. It’s used in MultiChoice 13/14 Series tub/shower valves produced after March 2006. The cartridge includes an integrated rotational limit stop, which controls the temperature range and is another confirming feature when the body is out in your hand.

Kohler: The Rite-Temp thermostatic K-28305-NA is black and orange — difficult to confuse with anything else. Kohler GP-series cartridges (like the GP800820) typically have a molded KOHLER brand mark, “COLD” orientation text, and the part number all on the cartridge body. Photograph the cartridge body before reinstalling; those molded markings are the key lookup evidence for Kohler parts.

Pfister: The 974-0420 is gray with a large threaded upper cylinder and a four-ear flange, fitting the 0X8, JX8, VB8, and JV8 deep casting valve families. Pfister lists a high-temperature limit stop and Pforever Seal as features — those functional details can help confirm a Pfister pressure-balance cartridge after removal. If you have a removed cartridge with no markings, Pfister’s support page says users can search directly by appearance using thumbnail images and dimensions for comparison.

American Standard: The M952100-0070A has a white body, gray base, and green inlet seals. It fits R110, R120, R115, and R125 rough-in valves — which means you need to confirm the rough-in valve family, not just the cartridge appearance, to order the correct part. The rough-in valve family is the key lookup field for American Standard shower systems.

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Manufacturer Lookup Tools by Brand

Each manufacturer’s workflow is slightly different. Here’s what each tool does well and where it falls short.

Delta — Find Parts and Identify Your Product: Accepts a known product model number and routes directly to the product detail page listing that product’s parts. Also offers common-parts-by-issue navigation for homeowners who don’t have the model number. Limitation: without the model number, you navigate by symptom or category, which can surface multiple possible cartridge matches.

Moen — Faucet Finder / Identifier: Supports photo-based faucet identification and links to “Identify My Product,” “Find Your Faucet,” and cartridge-replacement paths. Limitation: the tool is primarily oriented toward faucet (not shower valve) identification; a shower valve ID may still require cartridge photos or direct contact with Moen support.

Kohler — Service & Replacement Parts + KOHLER Scout: Offers a full “Find a Service Part” workflow plus KOHLER Scout — a beta photo ID tool that accepts an uploaded photo and attempts to identify the product model number. Limitation: Scout is marked beta, so treat its result as a starting point and confirm against the parts diagram before ordering.

Pfister — Parts & Support: Accepts a known product model number for parts and support information; also offers category filters by faucet type, finish, price, and style when the model number is unknown. Limitation: the support FAQ routes from faucet identification to “Installation & Support” and the parts diagram, so cartridge ID may take several steps.

American Standard — Parts Store: Organizes parts by category — toilet parts, bathroom faucet parts, bathtub parts, shower system parts, kitchen faucet parts. Limitation: shower cartridges must be matched to rough-in valve families, so browsing by category alone is not sufficient without the rough-in model number.

Before you order, use our free Repair Finder to cross-check your identified part number against confirmed compatible replacements — it’s the fastest way to avoid a wrong-cartridge purchase once you have a candidate model number.

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Serial Numbers and Date Codes: What’s Actually Useful

Manufacturer pages for shower valves don’t publish a universal serial-number decoder. Delta, Kohler, Pfister, and Moen all route homeowners through model number, product photo, category filters, or parts diagrams — not a standardized serial format. Don’t build your identification strategy around an assumed format like “Moen YY-MM-XXXX” or “Delta YYYY production-week” — those require manufacturer confirmation to use reliably.

The defensible approach is to record every visible code exactly as printed, then search it with the brand name and product type. If a code doesn’t match a known model number directly, the safer query is “[brand guess] shower cartridge [code] photo” combined with the manufacturer’s support contact path.

Date codes are more useful than serial formats because they map directly to cartridge generations. Delta states that the RP46074 applies to MultiChoice 13/14 Series valves produced after March 2006 — so if your valve predates that cutoff, you’re working with a different generation. Kohler product photos sometimes show a date-like molded marking on the cartridge body; preserve that in your photos because it may help Kohler customer support distinguish between cartridge revisions.

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When You Can’t Find the Brand — and When to Stop Searching

If all visible markings are gone, take three photo sets before buying anything: the full trim from straight-on, close-ups of the handle and escutcheon, and close-ups of the cartridge and valve body after safe disassembly. Moen’s Faucet Finder and Kohler Scout both accept uploaded photos for identification.

For cross-brand matching without a confirmed brand, Danco’s cartridge catalog filters by fit brand — American Standard, Delta, Kohler, Moen, Pfister, Symmons, Valley, and others — and its StemFinder tool can match by dimensions and broach shape. Danco is useful for confirming a brand-matched part, but it is not a substitute for knowing the brand first.

Replace the whole trim or valve — don’t keep hunting — when: the brand cannot be established after all seven inspection points, the cartridge is discontinued without a confirmed replacement path (as happened with Pfister’s 974-0420), the valve body is physically damaged, or the rough-in valve family can’t be confirmed (which creates American Standard mismatch risk).

Call a plumber for identification when: the cartridge cannot be accessed without shutting off the main water supply and your main shutoff is unreliable, the handle set screw is stripped, the cartridge is stuck, or the valve is behind finished tile. A 30-minute to one-hour identification visit typically runs $75–$150 in labor before local trip fees — based on plumber rate data from Fixr ($75–$150/hr average) and HomeGuide ($125–$350 for small jobs). That’s cheaper than two wrong cartridges and a third trip to the hardware store.

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How to Identify Shower Valve and Cartridge: Quick Decision Tree

Work through these in order. Each step assumes the prior step gave no result.

1. Is there a visible brand name or logo on the handle, handle cap, or escutcheon? — Yes → Go directly to that brand’s lookup tool (links above) with any model number or product code you can read — No → Photograph the trim from straight-on and proceed to step 2

2. Does the cartridge body — after removing the handle — match a visual profile above? — Yes → Match to the brand’s official cartridge page to confirm the part number before ordering — No → Upload your photo to Moen’s Faucet Finder, Kohler Scout, or contact Pfister/Delta/American Standard support directly

3. Is there any code stamped or molded on the cartridge or valve body? — Yes → Search “[your brand guess] shower cartridge [code]” and cross-check on the manufacturer’s support page — No → Use Danco’s StemFinder or fit-brand cartridge filters to narrow by dimensions and broach shape

4. Do you have original paperwork, a purchase receipt, or old cartridge packaging? — Yes → The model number printed there is the most reliable lookup key — use it with the manufacturer’s search tool — No → If still unresolved after steps 1–3, call the manufacturer support line with your photos; a plumber can expose the valve in 30 minutes if that’s what it takes

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What to Do Next

Once you’ve confirmed the brand and cartridge model, the repair path is specific. A Moen 1225 replacement involves a different pull force and retention clip approach than a Delta RP46074 swap — following the wrong procedure on the wrong cartridge damages the valve seat.

If you’re also trying to identify a kitchen or bathroom sink faucet rather than a shower valve, the same seven-location method applies to sink fixtures — see How to Identify Your Faucet Brand and Model for the sink-specific version. If your identified cartridge is leaking or the shower is dripping even after identification, Why Is My Faucet Leaking? walks through the diagnostic logic that follows.

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Sources

• Delta Find Parts and Identify Your Product
• Delta RP46074 MultiChoice Universal 13/14 Series Cartridge
• Moen 1222 Posi-Temp Cartridge
• Moen 1225 One-Handle Replacement Cartridge
• Moen 1213 M-CORE Cartridge
• Moen Faucet Finder / Identifier
• Kohler Service & Replacement Parts
• Kohler K-28305-NA Rite-Temp Thermostatic Cartridge
• Pfister Parts & Support
• Pfister 974-0420 Cartridge for 0X8/JX8/VB8/JV8 Deep Casting Valves
• American Standard M952100-0070A Pressure-Balance Valve Cartridge
• Danco Cartridge Catalog — Fit-Brand Filters
• Home Depot Delta RP46074 Listing
• Fixr Plumber Cost Guide
• HomeGuide Plumber Cost Guide

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Educational content only. Not a substitute for licensed professional advice. Local plumbing codes vary by jurisdiction. Use of any guidance from this guide is at your own risk.

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