Plumbing / Sinks Faucets
Parts List for Delta Faucet 19978-DST, 9178-DST & 9678-DST
Access the official parts list and exploded view diagram for Delta Faucet models 19978-DST, 9178-DST, and 9678-DST. Use this guide to identify replacement components such as sprayers, hoses, valves, and mounting hardware.
Table of contents
Quick guide from the manual
This document provides a comprehensive parts list and exploded view diagram for Delta Faucet models 19978-DST, 9178-DST, and 9678-DST. It is intended to help users identify specific components for maintenance, repair, or replacement. Always refer to the RP (Replacement Part) numbers listed in the diagram when ordering parts.
Parts Identification
The exploded view diagram illustrates the assembly of the faucet, showing how individual components fit together. Each part is labeled with a unique RP number. When ordering, ensure you verify the specific finish of your faucet, as some parts may vary by finish.
Key Components
- Sprayer & Hose Assembly: Includes options like RP51480 and RP90841 (ShieldSpray).
- Valve Assembly: Identified as RP50587.
- Mounting Hardware: Includes the mounting bracket and nut (RP51685) and various gaskets (RP51243, RP50788).
- Dispenser Assembly: Identified as RP50813, including the pump and bottle (RP47888).
- Aerators: Various aerator and wrench kits (RP90248, RP50815).
Maintenance and Troubleshooting
If you encounter issues such as low water flow or leaks, use the diagram to locate the relevant part. For low flow, check the aerator for debris. For leaks at the base, inspect the gaskets and mounting hardware. Ensure the weight assembly (RP49149) is correctly positioned on the hose to facilitate proper sprayer retraction.
Practical help
Common problems
Low water flow
Inspect the aerator (RP90248 or RP50815) for mineral buildup or debris and clean or replace as necessary.
Leaking at the faucet base
Check the condition of the gaskets (RP51243) and ensure the mounting bracket and nut (RP51685) are tightened correctly.
Sprayer not retracting properly
Verify that the steel weight assembly (RP49149) is securely attached to the hose and positioned to allow free movement.
Before use
- Identify your specific faucet model number (19978-DST, 9178-DST, or 9678-DST).
- Locate the corresponding part number on the exploded diagram.
- Check if your specific part requires a finish code when ordering.
- Ensure you have the necessary tools, such as the included wrench (RP60924), for maintenance.
Specs in practice
- 3/8-24 UNEF to 1/2-20 UN
- Adapter specifications for connecting the faucet supply lines to standard plumbing connections.
Images and diagrams
- The diagram provides an exploded view of the faucet assembly.
- Lines indicate the connection points for each component.
- Part numbers are clearly labeled next to each item for easy identification.
Model compatibility
- Ensure the adapter (RP63263) matches your plumbing connection type (3/8-24 UNEF to 1/2-20 UN or 1/2-14 NPSM).
Manual page author
Emily Carter
User documentation editor
Prepares concise manual descriptions and highlights the most useful setup, operation, and maintenance information for readers.