HDPE Manhole Rings

The “Ladtech System” offers a solution to the age-old problems associated with concrete manhole adjusting rings.

  • Mortarless and watertight assembly eliminates Inflow and Infiltration.
  • Corrosion proof, impervious to Hydrogen Sulfide gas and salt.
  • Durable, built for heavy traffic (H25 Traffic Rated), 100-year life expectancy.
  • Easy and cost effective and precision fit assembly with a wide range of slopes, and sizes.
  • Environmentally friendly made in the USA from 100% recycled HDPE.
Ladtech, Inc. specializes in manufacturing fully recycled high density polyethylene manhole adjusting or grade rings that eliminate deterioration problems associated with concrete, brick and rubber rings.

Ladtech has revolutionized the underground industry by reinventing the manhole adjusting ring – offering a solution to the age-old problems associated with concrete manhole adjusting rings. Imagine a new product that is engineered & designed to replace all existing products, where the new system is more economical, easier to use, functions better, requires less maintenance work and to top it all off, is made from recycled waste material.

The “Ladtech System” has been installed in manhole chimney sections since 1994 from as far as Ketchikan Alaska to the Bahamas, showing absolutely zero signs of breakage and degradation. Find out for yourself and use a superior product on your next project!

Mortarless Assembly

  • No mortar to mix and dispose of – or deteriorate causing leakage.
  • Easier and less costly to assemble – assures quality.
  • Less equipment needed to assemble.
  • Less chance for assembly failure & rework.

UV & Heat Resistant / Cold Temperature Performance

  • Durability around hot asphalt products
  • Lower actual life-cycle cost.
  • Material will not deform under load when cooled.
  • Stores outdoors for a reasonable period with no UV deterioration.
  • Longer product life

Independent Testing of Product

  • Verified product to perform in application
  • Validity of tests using ASTM D-4976, ASSHTO HS-20 and other standards
  • Demonstration of manufacture confidence in product
  • Sales tool for contractors and specifying engineers

Specifiable and Inspectable

  • Product can be identified and specified by name, material, performance.
  • Allows specifying engineer a way to control assembly and installation.
  • A control factor can be applied to the weakest area of an assembly.
  • Specific installation procedures assure a quality assembly.

Cost Effective

  • Actual installed cost is an advantage over a concrete ring and mortar.
  • Saves city/county/state life-cycle cost.
  • Contractor saves on installation cost.
  • No Additional cost for rehabilitation work.

Guarantee / Warranty

  • Quality Control with material & manufacturing assures performance.
  • Ladtech confidence with unprecedented warranty.
  • Broken rings are replaced at no cost.
  • Extra rings are reusable on other jobs.
  • Contractor does not have to back product.
  • Sales tool for contractor and specifying engineer.

The Ladtech® HDPE ring is designed and has been tested to withstand the wheel-loading requirements of AASHTO HS20 & HS25 and will not deteriorate or degrade when exposed to the harsh hydrogen- sulfide environment found in most sewer systems. The LADTECH SYSTEM® is cost-effective to install rather than traditional concrete adjustment rings.


For Any Reason Return Policy

  • The distributors of the HDPE Ladtech Adjusting Rings (the “Rings”) are authorized to replace any Ring, which is damaged in any way, due to material defect, or handling by the manufacturer, distributor, contractor or municipality. Simply return the Rings to your distributor for replacement rings.

Full Five Year Limited Warranty

  • Ladtech, Inc. (“Ladtech”) warrants that the Rings are new, of merchantable quality and free from material defects in workmanship under normal use for a 5-year period from the date of installation; provided, that such Rings were installed in accordance with Ladtech’s specifications (the “Warranty”). The Warranty shall only be applicable if Ladtech is given prompt written notice specifying the nature of the warranty claim. Warranty claims must be asserted by contacting Ladtech at (651) 415-1252.
  • Upon confirmation by Ladtech of a breach of the Warranty, the exclusive remedy to you shall be for Ladtech to replace the defective Ring and pay for the reasonable cost of installing the replacement Ring. The Warranty does not extend to any Ring subjected to misuse, accident or alteration.
  • Ladtech shall under no circumstances be liable for special, incidental, consequential or exemplary damages of any nature whatsoever, however occasioned (whether by negligence or otherwise), including, but not limited to, business interruption of any nature or loss of profits, even if Ladtech shall have been advised of the possibility of such damages.

Plus Five Year Replacement Policy

  • After the expiration of the Warranty and for a period of 5-years thereafter, upon a breach of the Warranty, Ladtech will replace the defective Ring, but not pay the installation cost for such replacement Ring.

As the Contractor, what can I expect from LADTECH® HDPE Rings?

  • Ease of installation – LADTECH® HDPE Adjusting Rings are lightweight, (approx. 6 lbs per ring), which reduces handling and transportation costs. Utilize pickup trucks for transportation instead of larger, more costly equipment.
  • Eliminate the mixing of mortar – Reduce your overhead by eliminating your concrete mixer and trailers full of sand, mortar mix, and water. Instead, simply apply an approved sealant between each ring, (check with your local ring distributor for details).
  • Reduce jobsite liability since there’s no need to wait for mortar to harden, the excavated holes can be filled and compacted as soon as casting is placed.
  • Broken and wasted rings are a concern of the past – The distributors of LADTECH® HDPE Adjusting Rings are authorized to replace any ring which is damaged in any way, due to material defect or handling by the manufacturer, distributor, contractor or municipality. Simply return the ring to your distributor for credit or new rings.

As a Municipality or the Designing Engineer, what can I expect from LADTECH® HDPE Rings?

  • Water tight joints, eliminating wastewater treatment costs associated with treating groundwater from infiltration between broken / cracked / deteriorated concrete adjusting rings.
  • A mortarless system above the MH cone or top slab. The concern of inconsistent mortar mix from job to job, day to day or even batch to batch is eliminated. Sealing is quickly and easily accomplished with one of several products.
  • The settlement of road surfaces around castings and MH rings due to deteriorated mortar and concrete rings, requiring costly rehabilitation projects, will become a concern of the past. Since the rings are not bonded together by mortar, the mortar can not deteriorate, and the migration of fine soils through the cracked concrete rings will no longer contribute to road surface breakup.
  • Plastic adjusting rings are inert to internal corrosion due to sulfuric acid, created from hydrogen sulfide gases and moisture common to sanitary sewers. The concerns of sulfuric acid attacking adjusting rings over time can now be forgotten. HS 25 loading – The LADTECH® HDPE Adjusting Rings are designed and tested to withstand loading in excess of HS 25.
  • Recycling makes sense! Help recycle the post consumer curbside waste within your community. LADTECH® HDPE Adjusting Rings are made of everyday consumer plastic products. Utilize an environmentally friendly product and improve your infrastructure at the same time.
  • Full Five Year Limited Warranty, Plus A Five Year Replacement Policy – LADTECH, Inc.® warrants the Adjusting ring for FIVE years against defects in materials in the adjusting ring from the date of installation plus a 5 year replacement policy! Will your current adjusting ring supplier warrant their material?