123065187 ST-49 Sewer Nozzle – 3/8" NPT, Size #5.5 (1F-3B)

Model / Part Number: 123 065 187
Category: Pressure Washer Accessories → Sewer & Drain Jetter Nozzles
Type: Fixed Sewer & Tube Cleaning Nozzle – 1 Forward / 3 Back (1F-3B)

The 123 065 187 ST-49 Sewer Nozzle (3/8″ NPT, Size #5.5) is a high-flow fixed jetter nozzle designed for professional sewer and drain cleaning applications. Featuring a 1 forward jet and 3 rear-facing jets, this configuration delivers strong clog penetration while maintaining powerful hose propulsion and effective pipe wall flushing.

Jet Configuration (1F-3B)

• 1 Forward Jet – Penetrates grease, sludge, ice, and compacted debris

• 3 Rear Jets – Propel the hose forward and flush loosened material

• Self-Propelling Design – Back pressure drives the nozzle through the line

This balanced configuration makes it ideal for both blockage removal and general sewer line cleaning.

Technical Specifications

• Model: ST-49

• Part Number: 123 065 187

• Inlet Connection: 3/8″ NPT

• Orifice Size: #5.5

• Jet Pattern: 1 Forward / 3 Back

• Maximum Pressure: 4200 PSI

• Application: Sewer & drain cleaning

Key Features

• ST-49 3/8″ sewer jetter nozzle

• #5.5 orifice drain cleaning tip

• 1F-3B jet configuration

• High-flow 3/8″ NPT sewer nozzle

• Self-propelling drain cleaning design

• Rated up to 4200 PSI

• Professional pressure washer jetting accessory

Ideal Applications

• Commercial sewer cleaning

• Larger diameter drain lines

• High-GPM pressure washer systems

• Heavy grease and sludge removal

• Preventative sewer maintenance

Why Choose the #5.5 Orifice?

The #5.5 orifice supports moderate to higher GPM machines and provides increased thrust compared to smaller nozzle sizes, making it suitable for more demanding cleaning applications.

⚠ Important: Always match the #5.5 orifice size to your machine’s GPM to maintain proper PSI and protect your pump.