Plumbing / Toilet Flushers
Sloan Royal 111-1.28-CP Manual Flushometer
Quick guide for the Sloan Royal 111-1.28-CP manual flushometer. Includes technical specifications, operating pressure requirements, rough-in dimensions, and key features.
Table of contents
Manual images
Click an image to enlargeQuick guide from the manual
The Sloan Royal 111-1.28-CP is a manual diaphragm flushometer designed for water closets. Before installation, ensure your water supply system provides a flowing pressure between 15 and 80 psi (103-552 kPa). This unit is designed for fixtures with a top spud connection and requires a 1-inch supply pipe.
Product overview
This flushometer features a polished chrome finish and is built with high-copper, low-zinc brass castings for dezincification resistance. It utilizes CID technology for flush accuracy and includes a PERMEX synthetic rubber diaphragm with a dual-filtered fixed bypass.
Technical specifications
- Flush Volume: 1.28 gpf (4.8 lpf)
- Valve Type: Diaphragm
- Fixture Connection: Top Spud
- Supply Pipe: 1 inch (25mm)
- Spud Coupling: 1.5 inches (38mm)
- Rough-in Dimension: 11.5 inches (292mm)
Operating requirements
The valve requires a flowing pressure of 15-80 psi (103-552 kPa) to operate correctly. Specific fixtures may require higher minimum flowing pressure; always consult the fixture manufacturer's requirements.
Features
- ADA Compliant: Features a non-hold open handle to prevent exceeding the intended flush volume.
- Vandal-Resistant: Equipped with a vandal-resistant stop cap.
- Durability: Constructed with semi-red brass for the valve body, cover, tailpiece, and control stop.
Rough-in dimensions
The installation requires a specific rough-in dimension of 11.5 inches (292mm) from the centerline of the fixture to the supply pipe. Ensure the supply line is 1 inch I.P.S.
Practical help
Common problems
Insufficient flush volume
Check if water pressure is within the required 15-80 psi range.
Valve not operating
Verify supply pipe size is 1 inch and connection type is correct for the fixture.
Before use
- Verify water supply pressure is between 15-80 psi (103-552 kPa).
- Ensure fixture is a water closet with a top spud connection.
- Confirm supply pipe size is 1 inch (25mm).
- Check that the rough-in dimension is 11.5 inches (292mm).
Specs in practice
- Flush Volume
- 1.28 gpf (4.8 lpf) - The amount of water used per flush.
- Operating Pressure
- 15-80 psi - Required flowing pressure for proper valve function.
- Rough-in Dimension
- 11.5 inches - Distance from the centerline of the fixture to the supply pipe.
Images and diagrams
- The rough-in drawing illustrates the required distance from the finished wall and floor to the fixture connection and supply pipe.
Model compatibility
- Compatible with WaterSense fixtures when used with a 1.28 gpf flushometer.
- Designed for water closets with top spud connections.
Manual page author
Emily Carter
User documentation editor
Prepares concise manual descriptions and highlights the most useful setup, operation, and maintenance information for readers.