Delta identification hub
Delta faucet and shower part identification
A practical route through Delta model, MultiChoice valve, cartridge, and Diamond Seal Technology clues.
Direct answer
Use the faucet model or Delta parts diagram first; for showers, identify the valve generation and control function before comparing cartridge numbers.
Fit facts
What identifies this match
Use these details together. One matching feature does not establish compatibility.
- Model format
- Delta model numbers often include letters, digits, and suffixes that describe configuration or finish
- Shower platform
- MultiChoice Universal is a rough-in platform used with multiple Delta trim series
- Generation clue
- Older and newer pressure-balance cartridges can look related while having different applications
- Faucet technology
- Diamond Seal Technology faucets use model-specific DIAMOND valve assemblies
- Control clue
- 13/14, 17, and 17T trim series represent different control functions
- Best evidence
- The current official product parts diagram and removed-part measurements
Start with Delta's model record
Use the number on the box, receipt, installation sheet, or product page to reach Delta's parts diagram. Preserve every suffix because similar collection names may cover different handle layouts or finishes.
Interpret part-number clues
Delta replacement parts commonly carry an RP prefix. An RP number is meaningful evidence only when Delta lists it for the faucet or valve being serviced; a matching color or shape is not an application record.
Map shower controls to the valve
Identify whether the trim is a 13/14 Series, 17 Series, or 17T thermostatic control and whether the rough-in is MultiChoice. The trim's control behavior and official compatibility statement matter more than its exterior silhouette.
Watch the production boundary
Delta shower valves and cartridges have changed across production periods. When documentation gives a date boundary, compare installation date, original valve features, and the cartridge removed from the wall before selecting a replacement.
Distinguish faucet contexts
A DIAMOND valve from a kitchen faucet should not be inferred from a shower cartridge, and widespread bath faucets follow another parts path. Record fixture type, handle count, spout arrangement, and any Touch2O electronics before searching.
Decision path
Find the model, review its Delta parts diagram, identify the RP number, then compare the original part's stem, ports, seals, and dimensions. If the model is unknown, work from control behavior and physical evidence while treating visual matches as candidates only.
Independent reference
FaucetClarity is independent and is not affiliated with or endorsed by Delta Faucet Company. Brand and part references identify potential service applications; the manufacturer's current documentation controls the purchase decision.
Questions
Before you remove or replace the part
What does RP mean on a Delta part?
It is used in Delta replacement-part identifiers; confirm the complete RP number in the product's official parts list.
Does every MultiChoice trim use the same cartridge?
No. The selected trim series and control function determine the compatible cartridge assembly.
Can a collection name identify the valve?
Not reliably. Collections describe styling across products; use model, series, rough-in, and parts documentation.
Reference trail