121395195 ST-49 Sewer Nozzle – 1/4" NPT, Size #8.0 (1F-3B)

Model / Part Number: 121395195
Category: Pressure Washer Accessories → Sewer & Drain Jetter Nozzles
Type: Self-Propelling Fixed Sewer Nozzle – 1 Forward / 3 Back (1F-3B)

The 121395195 ST-49 Sewer Nozzle (1/4″ NPT, Size #8.0) is a heavy-duty, self-propelling sewer cleaning nozzle engineered for high-flow pressure washer jetting systems. Designed with 1 forward jet and 3 rear-facing jets, this nozzle uses back pressure to propel itself through sewer lines while blasting debris from pipe walls.

How It Works

These nozzles are specifically designed to propel themselves through pipes.
The rear-facing jets create thrust, pulling the hose forward, while the forward jet penetrates clogs and compacted debris.

• 1 Forward Port – Breaks through blockages

• 3 Rear Ports – Provide propulsion and flushing action

• Back Pressure Driven – Uses water flow to power forward movement

Technical Specifications

• Model: ST-49

• Part Number: 121395195

• Inlet: 1/4″ FPT

• Jet Configuration: 1F-3B

• Maximum Pressure: 4200 PSI

• Orifice Size: #8.0 (verify sizing to match machine GPM)

• Outside Diameter: 0.730″

• Material: Corrosion-resistant stainless steel

• Weight: 0.08 lbs

Key Features

• ST-49 1/4″ sewer jetter nozzle

• #8.0 orifice high-flow drain cleaning nozzle

• 1 forward / 3 back jet configuration

• Self-propelling sewer nozzle design

• Stainless steel construction

• Rated to 4200 PSI

• Professional pressure washer drain cleaning accessory

Ideal Applications

• Large-diameter sewer lines

• Commercial drain cleaning

• Heavy grease, sludge, and debris removal

• Long pipe runs requiring strong propulsion

• High-GPM jetting systems

Why Choose the #8.0 Orifice?

The #8.0 orifice is intended for high-flow machines that require greater water volume to maintain pressure and thrust. It is ideal for larger sewer lines and commercial cleaning applications.

⚠ Important: Always confirm orifice size (#8.0 vs 12.0 listed in specs) and match it to your pressure washer’s GPM to maintain correct PSI and prevent pump damage.