Olyflow Scupper RetroDrain

The SCUPRD3, SCUPRD4, SCUPRD5, and SCUPRD6 models are part of OMG’s Scupper Thru-Wall RetroDrain product line. Designed to replace existing through-wall or side-wall drains in re-roofing applications, these drains provide a secure and watertight solution without requiring removal of existing plumbing. They feature a durable aluminum body, stainless steel hardware, a large pre-punched flange for flashing integration, and the proven U-Flow mechanical seal to connect securely to PVC or cast iron leader pipes.

Key Features

• available in 3-, 4-, 5-, and 6-inch sizes

• U-Flow mechanical seal ensures watertight connection and prevents backflow

• aluminum body with stainless steel clamping components for long-lasting performance

• large 16 × 10 × 10-inch flange simplifies flashing integration

• aluminum strainer dome with wing-nut attachment for easy maintenance

• item numbers: SCUPRD3, SCUPRD4, SCUPRD5, SCUPRD6
• drain body thickness: 0.080-inch aluminum
• flange dimensions: 16 × 10 × 10 inches
• strainer dome thickness: 0.060-inch aluminum
• clamp ring thickness: 0.125-inch stainless steel
• stem / clamp ring length: 10 inches
• seal type: U-Flow mechanical seal
• packaging quantity: 1 per box
• unit weight: approximately 32 lbs

• Remove the existing scupper drain components and clean the wall or flashing area.
• Prepare the existing leader pipe by cleaning to ensure a proper seat for the U-Flow seal.
• Insert the RetroDrain stem into the existing leader, aligning the flange over the flashing area.
• Tighten the U-Flow seal screws evenly with the proper tool until watertight.
• Fasten the flange to the wall and deck with appropriate fasteners.
• Install the stainless steel clamping ring over flashing and secure with supplied hardware.
• Attach the strainer dome with wing nuts, ensuring proper fit and alignment.

Q: What sizes are available in the Scupper Thru-Wall RetroDrain line?
A: Four sizes are available: 3-inch, 4-inch, 5-inch, and 6-inch.

Q: What is the function of the U-Flow seal?
A: It creates a watertight mechanical connection to existing piping and prevents backflow.

Q: What materials are used in these drains?
A: The drain body is 0.080-inch aluminum, the strainer dome is 0.060-inch aluminum, and the clamp ring is stainless steel.

Q: What is the size of the flange?
A: The flange measures 16 × 10 × 10 inches and is pre-punched for easy installation.

Q: How heavy is each drain?
A: Each unit weighs approximately 32 lbs.