What's the practical working distance for the AL8-26's 26-power magnification?

The 26-power magnification is optimized for typical contractor applications at moderate working distances—generally 100 to 300 feet depending on lighting conditions and target clarity. Longer distances are possible but require higher-quality sighting targets; shorter distances offer the brightest, fastest readings for routine grading and layout work.

How does the automatic leveling system work, and does it require batteries or power?

The automatic compensation system uses internal optical and mechanical components to maintain a level line of sight without external power. No batteries are required for the leveling function, making the AL8-26 dependable on extended jobsites without access to charging infrastructure.

Is the AL8-26 sealed well enough for wet conditions, or should I protect it from rain?

The sealed optical housing resists moisture and dust exposure, but the AL8-26 is not fully waterproof—it's splash-resistant and designed to handle typical jobsite weather. Avoid submerging it or exposing it to heavy rain for extended periods, and store it dry at the end of each work day to preserve optical clarity.

Can I use the AL8-26 on steep grades, or will the automatic compensation fail on extreme slopes?

The automatic leveling system is designed for typical jobsite conditions with moderate to steep grades. Extreme angles (beyond manufacturer specifications) may exceed the compensation range; refer to the operator manual for specific tilt limits, or contact Express Tools support for clarification on your specific application.

What's the difference between the AL8-26 and manual optical levels, and is automatic compensation worth the price difference?

Automatic levels eliminate manual bubble adjustment, reducing setup time by 50% or more on slopes and uneven terrain while cutting operator error significantly. For crews running multiple daily setups or working on variable grades, the speed and accuracy gains typically justify the cost difference within the first few weeks of use.

Does the AL8-26 come with a tripod, or do I need to buy one separately?

The AL8-26 is the instrument only (SKU David White AL8-26 / 45-8926); tripod purchase is separate. Express Tools carries compatible professional tripods sized for automatic levels—contact our support team to confirm the right tripod for your setup.

Topcon 329390090 Pipe Laser Leg Set for 6-inch Pipe - Set of 4 each - for Topcon Pipe Lasers

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At a Glance

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

Topcon329390090SKU David White AL8-26 / 45-8926New

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Topcon 329390090 Pipe Laser Leg Set for 6-inch Pipe - Set of 4 each - for Topcon Pipe Lasers

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6-inch (nominal inside diameter) Range

Cover large layout jobs with a 6-inch (nominal inside diameter) working reach.

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Quick Answer

What is the Topcon 329390090?

The Topcon 329390090 Pipe Laser Leg Set for 6-inch Pipe - Set of 4 each - for Topcon Pipe Lasers is a Topcon professional jobsite instrument with 6-inch (nominal inside diameter) pipe diameter compatibility. It's available from Express Tools as an authorized Topcon dealer with same-day shipping on in-stock orders.

FIELD APPLICATIONS

What contractors use this accessories for

Foundation Layout and Elevation Verification

General contractors use the AL8-26 to establish consistent elevation references across foundation perimeters and verify finished floor heights before concrete placement. The automatic leveling eliminates setup delays when working on sloped sites or transitioning between multiple reference points.

Drainage and Grading Design Confirmation

Site supervisors and grading contractors rely on the AL8-26 to confirm drainage slopes and finished grade elevations before final grading operations. Clear 26-power sightings allow accurate slope readings at practical working distances without magnification-related brightness loss.

Concrete Crew Grade and Slope Verification

Concrete crews use the AL8-26 to establish and verify floor slabs, driveway grades, and parking lot drainage slopes before finishing. The automatic compensation system speeds up setup on uneven terrain, keeping crews moving without repeated manual adjustments.

Deck and Residential Construction Layout

Deck installers and residential builders use the AL8-26 to set consistent beam heights and verify elevated structure elevations across multiple support points. The sealed optics protect the instrument from moisture exposure common in outdoor residential framing.

Landscape and Site Elevation Management

Landscapers use the AL8-26 to establish finished site grades, verify drainage patterns, and confirm elevation changes across large outdoor areas. The automatic leveling feature is especially valuable on rolling terrain where manual levels would require constant recalibration.

PRODUCT OVERVIEW

Product Description

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

Related Guides

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.

Why This Equipment

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KIT CONTENTS

What's In The Box

David White AL8-26 Automatic Level 26 Power

Why Buy This?

Professional-grade equipment, authorized dealer pricing.

The tools contractors trust on municipal infrastructure, commercial projects, and high-tolerance earthwork aren't available at hardware stores — and they shouldn't be. This equipment is engineered for professionals, and buying it through an authorized dealer means you get full manufacturer support when it matters.

Express Tools carries only factory-fresh inventory from brands contractors specify by name. No gray-market product, no import-spec units, just authentic gear with legitimate firmware and calibration documentation.

Same-day shipping on in-stock items, expert support before and after the sale, and a 30-day return window on most products. If you have questions about specs, compatibility, or applications, call us — we know this equipment.

TECHNICAL SPECS

Specifications

Technical Specs

Manufacturer data and field-verified measurements.

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

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