Mueller Streamline 6394 Pvc Dwv Trap Adapter 1-1/2 X 1-1/4

Product Description

The MUELLER STREAMLINE 6394 is a reducing PVC DWV trap adapter fitting designed for drain, waste, and vent applications where a 1-1/2 inch hub inlet connects to a 1-1/4 inch slip joint outlet. Constructed from Schedule-rated PVC meeting ASTM D2665, F1498, D331, and D1784, this fitting delivers reliable chemical and corrosion resistance in residential and light commercial drain systems. The smooth interior wall profile minimizes scaling and supports consistent flow. A chrome nut and washer are included for a finished appearance at the slip joint connection, making it a direct-fit solution for P-trap installations beneath sinks and lavatories. Licensed plumbers and journeyman plumbers are the primary installers.

This adapter is suited for residential sink, lavatory, and similar fixture drain connections where a hub-to-slip-joint transition is required. Its reducing configuration handles the common size step-down from a 1-1/2 inch drain stub-out or trap arm to a 1-1/4 inch P-trap tube. The DWV rating makes it appropriate for non-pressure gravity-drain piping systems. The fitting also carries suitability for chemical-resistant drain applications consistent with its NSF 14 and UPC listings.

Key Features

• Reducing trap adapter: 1-1/2 inches hub inlet to 1-1/4 inches slip joint outlet
• PVC construction resistant to corrosion and common drain chemicals
• Smooth interior walls reduce scaling and support unrestricted flow
• Includes chrome nut and washer for a clean, finished slip joint connection
• Meets NSF 14 and UPC standards for DWV applications
• Manufactured to ASTM D2665, F1498, D331, and D1784 dimensional and material specifications

Compatibility

Designed as an OEM-style replacement or new-installation fitting for residential and light commercial PVC DWV trap assemblies requiring a 1-1/2 inch hub to 1-1/4 inch slip joint reducing connection.

Installation Notes

Installation is performed by a licensed plumber following applicable IPC or local plumbing code requirements. Shut off the water supply and clear the trap arm before removing the existing fitting. Use appropriate PVC primer and solvent cement on the hub end per the cement manufacturer and ASTM guidelines. Do not overtighten the chrome slip-joint nut, as PVC trap tubes can crack under excess compression force.

Technical Specifications

• Fitting Type: Trap Adapter, Female, Reducing
• Size A (Hub): 1-1/2 inches
• Size B (Slip Joint): 1-1/4 inches
• End Connection: Hub x Slip Joint
• Material: PVC
• Material Specification: ASTM D2665, F1498, D331, D1784
• Application: DWV, Chemical Resistant, Corrosion Resistant
• Included Hardware: Chrome Nut and Washer
• Applicable Standards: NSF 14, UPC

Standard Information

• Brand: MUELLER STREAMLINE
• Manufacturer Part Number: 6394