Oatey 91bd20bn1 Double Slip Joint Extension Tube

Product Description

The OATEY 91bd20bn1 is a double slip joint extension tube designed for tubular drain applications in residential and light commercial plumbing. Manufactured from 20-gauge brass, this extension tube provides a durable, corrosion-resistant connection in drain line assemblies beneath sinks and lavatories. At 1-1/4 inches in diameter, it fits standard slip joint drain configurations and is installed by licensed plumbers and experienced DIYers working on fixture drain rough-in or replacement projects. The brass construction ensures longevity in wet environments where plastic alternatives may degrade over time.

This extension tube is suited for use in sink and lavatory drain assemblies where additional length is needed between the fixture drain outlet and the trap or trap arm. Typical applications include kitchen sinks, bathroom lavatories, and utility sinks using 1-1/4 inch tubular drain components. It is commonly used during new fixture installation, drain reconfiguration, or replacement of corroded or damaged extension sections in existing drain assemblies.

Key Features

• Double slip joint design allows adjustment and easy disassembly without cutting pipe
• 20-gauge brass construction resists corrosion in continuous-wet drain environments
• 1-1/4 inch diameter fits standard tubular drain slip joint fittings
• Suitable for residential sink and lavatory drain applications

Compatibility

Designed as an OEM-style replacement for standard 1-1/4 inch slip joint tubular drain assemblies in residential and light commercial plumbing systems.

Installation Notes

Installation is performed by a licensed plumber or qualified tradesperson. Shut off the water supply and clear the drain line before beginning work. Slip joint connections should be hand-tightened and then snugged with slip joint pliers — avoid over-tightening brass fittings, which can distort the slip joint nut or tube. Drain work must comply with applicable local plumbing codes and the International Plumbing Code where adopted.

Technical Specifications

• Diameter: 1-1/4 inches
• Material: Brass
• Gauge: 20-gauge
• Connection Type: Double Slip Joint
• Application: Tubular Drain

Standard Information

• Brand: OATEY
• Manufacturer Part Number: 91bd20bn1