ST-49 Sewer Nozzle – 3/8" NPT, Size #12.0 (1F-4B)

Model / Part Number: 123 065 186
Category: Pressure Washer Accessories → Sewer & Drain Jetter Nozzles
Type: Heavy-Duty Fixed Sewer Nozzle – 1 Forward / 4 Back (1F-4B)

The ST-49 Sewer Nozzle (3/8″ NPT, Size #12.0) is a high-flow, professional-grade sewer jetting nozzle engineered for large-diameter pipe cleaning. Built with 1 forward jet and 4 rear-facing jets (30° angle), this configuration provides powerful clog penetration, maximum thrust, and aggressive debris flushing.

Jet Configuration (1F-4B)

• 1 Front Jet – Penetrates fully clogged or frozen pipes

• 4 Rear Jets (30°) – Deliver maximum propulsion while flushing debris from pipe walls

• Self-Propelling Design – Rear jet thrust pulls the hose through the line

This setup provides stronger propulsion and wider wall coverage than standard 1F-3B models.

Technical Specifications

• Model: ST-49

• Part Number: 123065186

• Inlet: 3/8″ Female (NPT)

• Orifice Size: #12.0

• Jet Pattern: 1 Forward / 4 Back

• Maximum Pressure: 4,200 PSI

• Material: Stainless Steel

• Outside Diameter (O.D.): 0.92″

• Weight: 1.30 oz

• Recommended Pipe Size: 4″–8″ diameter lines

Key Features

• ST-49 3/8″ sewer jetter nozzle

• #12.0 high-flow drain cleaning tip

• 1F-4B jet configuration

• Stainless steel construction

• German-engineered components

• Rated up to 4,200 PSI

• Designed for 4″ to 8″ sewer pipes

• High-thrust commercial drain cleaning nozzle

Ideal Applications

• Municipal sewer cleaning

• Large commercial drain systems

• Frozen pipeline clearing

• Heavy grease, sludge, and scale removal

• 4″–8″ diameter sewer lines

Why Choose the #12.0 Orifice?

The #12.0 orifice is designed for very high GPM jetting systems, delivering exceptional flow and propulsion for large-diameter pipe cleaning.

⚠ Important: Always match the #12.0 orifice to your machine’s GPM rating to maintain correct operating PSI and avoid pump strain.