The Topcon 329390090 is the factory OEM replacement leg set designed specifically for Topcon pipe lasers operating inside 6-inch diameter pipe. This set of four precision-engineered legs positions your pipe laser at the exact center height required to project a true, grade-accurate reference beam — giving your grade checkers and laser receivers consistent, reliable readings on every run. Whether you're laying sewer mains, storm drain lines, or utility conduit, having the right legs for your pipe diameter is not optional — it's fundamental to a quality installation.
Product Overview & Jobsite Applications
Pipe lasers are only as accurate as their setup. The legs that support the instrument inside the pipe determine whether the beam exits at true centerline — or introduces systematic error into every grade reading downstream. Topcon engineers the 329390090 leg set to precise tolerances matched to 6-inch pipe ID dimensions, so the instrument sits stable, centered, and aligned without shimming, improvising, or guesswork. These legs are the correct factory solution for crews running Topcon pipe lasers on municipal sewer projects, residential storm drain installations, commercial site utilities, and DOT-specified pipeline work.
Key Specifications
- Part Number: 329390090
- Manufacturer: Topcon Positioning Systems
- Pipe Diameter Compatibility: 6-inch (nominal inside diameter)
- Quantity: Set of 4 legs
- Part Type: OEM factory replacement accessory
- Compatibility: Designed for Topcon pipe laser models — confirm compatibility with your specific unit
- Application: Pipe laser centering and elevation support inside 6-inch pipe
What's in the Kit
- 4x OEM Topcon pipe laser support legs sized for 6-inch pipe
- Factory-matched geometry for accurate beam centerline positioning
- Durable construction suited for field use in wet, muddy, and confined-space conditions
- Direct factory replacement — no modification or adaptation required
Job Applications
Municipal Sewer Main Installation: Lay sanitary sewer mains to specified grade with confidence. The 329390090 legs keep the beam centered in 6-inch vitrified clay, PVC, or ductile iron pipe so your grade man gets accurate readings from the first joint to the last.
Storm Drain & Drainage Infrastructure: Precise grade control on 6-inch storm drain laterals and trunk lines reduces rework and inspection failures. Correct legs eliminate guesswork about beam height.
Utility Conduit Runs: Electrical and telecommunications conduit installations in 6-inch pipe benefit from laser-guided grade control, especially on long runs or those with critical fall requirements.
Residential & Light Commercial Site Work: On tighter sites where 6-inch pipe is the standard for gravity laterals and service connections, having OEM legs on hand keeps the crew moving without improvised setups that introduce error.
Compatible Accessories
- Topcon Pipe Laser Leg Sets — Other Pipe Sizes
- Topcon TP-L5 Pipe Laser
- Topcon TP-L6 Pipe Laser
- Pipe Laser Targets and Grade Rods
- Laser Receiver for Pipe Laser Grade Checking
Related Guides
- How to Set Up a Pipe Laser for Accurate Grade Control
- Choosing the Right Pipe Laser Legs for Your Pipe Size
- Pipe Laser Troubleshooting: Common Setup Errors and Fixes
- Topcon Pipe Laser Accessories Buyer's Guide
Frequently Asked Questions
- What pipe diameter does the Topcon 329390090 leg set fit?
- The 329390090 leg set is engineered specifically for 6-inch nominal diameter pipe. Using legs designed for the wrong pipe size will misplace the beam centerline and introduce grade error. Always match leg set to pipe diameter.
- How many legs come in this set?
- This is a complete set of 4 legs. Four legs provide stable, symmetric support inside the pipe to keep the instrument level and centered for accurate beam projection.
- Are these OEM Topcon parts or aftermarket?
- These are genuine OEM Topcon factory replacement parts, part number 329390090. OEM legs ensure the dimensional tolerances match your Topcon pipe laser exactly — no fitting issues or accuracy compromises from generic alternatives.
- Which Topcon pipe laser models use the 329390090 legs?
- The 329390090 legs are designed for Topcon pipe lasers used with 6-inch pipe. Compatibility depends on your specific model. Contact Express Tools or refer to your Topcon instrument documentation to confirm fitment before ordering.
Frequently Asked Questions
What pipe diameter does the Topcon 329390090 leg set fit?
The Topcon 329390090 leg set is engineered specifically for 6-inch nominal inside diameter pipe. Using legs sized for the wrong pipe diameter will offset the beam from true centerline and introduce systematic grade error into your installation. Always match the leg set to your actual pipe diameter.
How many legs come in this set?
This listing is for a complete set of 4 legs. Four legs provide symmetric, stable support inside the pipe, keeping the pipe laser properly centered and level for accurate line and grade projection across the full run.
Are these OEM Topcon parts or aftermarket replacements?
These are genuine OEM Topcon factory replacement parts under part number 329390090. OEM components are manufactured to Topcon's exact dimensional specifications, ensuring proper fit, stable support, and no compromise to your instrument's accuracy in the field.
Which Topcon pipe laser models are compatible with the 329390090 leg set?
The 329390090 legs are designed for use with Topcon pipe lasers operating in 6-inch pipe. Specific model compatibility varies. Consult your Topcon instrument user manual or contact Express Tools directly to confirm that 329390090 is the correct leg set for your particular pipe laser model before ordering.
