Mueller Streamline K018150 Dwv Reducing Trap Adapter Pvc

Product Description

The MUELLER STREAMLINE K018150 is a DWV reducing trap adapter designed to connect drain, waste, and vent piping where a size transition is required at a trap outlet. It measures 1-1/2 inches nominal on the hub end and 1-1/4 inches nominal on the slip end, allowing a standard P-trap tailpiece to seat and seal without threading. Constructed from schedule-grade PVC, it is lightweight, corrosion-resistant, and suitable for residential and light commercial drain applications. Licensed plumbers and journeymen installers use this fitting during rough-in and finish plumbing work on sinks, lavatories, and similar fixtures where the drain body and trap sizes differ.

This adapter is used in residential and light commercial plumbing systems wherever a 1-1/2 inch hub connection must transition to a 1-1/4 inch slip trap outlet. Typical installations include kitchen sinks, bathroom lavatories, and utility basins where the drain stub-out or sanitary tee is a larger nominal size than the trap arm or P-trap assembly. The hub end accepts solvent-welded PVC pipe, while the slip end accepts an insert-and-tighten trap connection secured with a slip-joint nut.

Key Features

• Reduces from 1-1/2 inch hub to 1-1/4 inch slip in a single fitting
• Hub end designed for solvent-weld connection to schedule PVC DWV pipe
• Slip end accepts standard slip-joint trap nuts and washers
• PVC construction resists corrosion and chemical attack from household drain waste
• Domestic manufacture

Compatibility

Designed as an OEM-style replacement fitting for residential and light commercial PVC DWV drain systems requiring a 1-1/2 inch hub to 1-1/4 inch slip reducing trap adapter.

Installation Notes

Installation is performed by a licensed plumber in accordance with the applicable International Plumbing Code (IPC) or local adopted code. Shut off the water supply and clear the trap of standing water before beginning work. The hub end requires clean-cut, deburred pipe, a compatible PVC primer, and solvent cement applied per the cement manufacturer's instructions. Do not over-tighten the slip-joint nut on the slip end, as PVC threads and washers can deform under excessive torque.

Technical Specifications

• Nominal Size: 1-1/2 x 1-1/4 inches
• End Style: Hub x Slip
• Material: PVC
• Application: DWV (Drain, Waste, Vent)
• Origin: Domestic

Standard Information

• Brand: MUELLER STREAMLINE
• Manufacturer Part Number: K018150