Plumbing / Toilet Flushers
Sloan 115-1.28-CP-2-OFST Manual Flushometer
Quick guide for the Sloan 115-1.28-CP-2-OFST manual flushometer. Includes technical specifications, operating pressure requirements, and rough-in installation dimensions.
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Manual images
Click an image to enlargeQuick Guide
The Sloan 115-1.28-CP-2-OFST is a manual water closet flushometer designed for efficiency and durability. Before installation, ensure your water supply pressure is within the required range of 15-80 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 dual-filtered fixed bypass diaphragm and a polished chrome finish. It is engineered for water conservation, utilizing CID technology to control flush accuracy and a non-hold open handle to prevent excessive water usage.
Technical Specifications
- Flush Volume: 1.28 gpf (4.8 lpf)
- Valve Type: Diaphragm
- Valve Body Material: Semi-red Brass
- Fixture Type: Water Closet
- Fixture Connection: Top Spud
- Supply Pipe: 1 inch (25mm)
- Spud Coupling: 1.5 inch (38mm)
- Offset: 2 inches (51mm)
- Operating Pressure: 15-80 psi (103-552 kPa)
Installation Rough-in
The installation requires specific clearance and positioning. The rough-in dimension is 24 inches (610mm) from the center of the waste to the supply line. Ensure a minimum of 2-1/4 inches (57mm) clearance from the wall. The supply line connection is 1 inch I.P.S.
Features and Compliance
The unit is built for longevity with dezincification-resistant brass castings and a high chloramine-resistant PERMEX synthetic rubber diaphragm. It is ADA compliant and meets various certifications, including cUPC Green Certified, IAPMO, and EPA WaterSense listing when used with a compatible 1.28 gpf fixture.
Practical help
Before use
- Verify water supply pressure is between 15-80 psi (103-552 kPa).
- Ensure the fixture is a compatible water closet with a top spud connection.
- Confirm the 24-inch rough-in dimension matches your installation site.
- Check that the supply pipe is 1 inch (25mm).
- Ensure the installation area allows for the 2-inch offset.
Specs in practice
- 1.28 gpf (4.8 lpf)
- Gallons per flush; indicates the water volume used per cycle.
- 2-inch Offset
- The distance the flushometer pipe is offset from the center line.
Images and diagrams
- The rough-in drawing shows the 24-inch distance from the center of the waste to the supply line.
- The diagram indicates a 1-inch I.P.S. supply connection.
- The drawing illustrates the 2-1/4 inch minimum clearance required from the wall.
Model compatibility
- Requires a compatible water closet fixture.
- WaterSense compliant only when used with a 1.28 gpf (4.8 lpf) WaterSense fixture.
Manual page author
Michael Turner
Technical manual editor
Reviews PDF manuals for structure, safety notes, and practical product details so readers can find the right information quickly.