Labline® Mechanical Joint System

Labline® Mechanical Joint


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Quick installation & high performance

Labline® systems provide quick and easy assembly through their reusable and reliable mechanical joints, that can be reconfigured if needed but do not require regular tightening or maintenance.

product overview

Joining the Labline® System is complete in just 30 seconds and once the nut is locked into place, the end-user is assured of many years of trouble-free service. There is no need for fusing, caulking, or welding joints. This mechanical joint system can be easily dismantled and re-used, making it ideal for modular designs and for systems that may require re-modeling in the future. Commonly used in applications such as:

  • Industrial plants
  • University Laboratories
  • Schools
  • Hospitals
  • Pharmaceuticals facilities
  • Chemical manufacturing


Labline® joints utilize an Elastolive seal and locking nut to create a quick and reliable leak-free joint.  Joints are complete in about 30 seconds, and once the nut is locked into place the joint is considered to be maintenance-free, which means no re-tightening.

  • The proven reliability and corrosion resistance of our specially formulated polypropylene for over 30 years
  • Can be disassembled and re-used
  • No-heat Elastolive and locking nut for high-integrity joints in seconds
  • Designed to prevent pipe pull-out and leaks due to misalignment, giving you unsurpassed versatility in designing your acid waste system
  • All plastic construction (no additional chemical resistance concerns)


The specification section covers the details you need for your project

Available in 1 ½” to 4” FRPP – Flame Retardant Polypropylene (Sch40 or Sch80, 10ft or 20ft Pipe)

  • Schedule 40 from 1 1⁄2″ to 4″ IPS
  • Schedule 80 from 1 1⁄2″ to 4″ IPS



The pipe shall be made from NSF listed Type 110 or 210, flame retardant polypropylene conforming to ASTM D4101, with a maximum average flame spread of zero seconds and a maximum extent of burning of 13 mm, in accordance with ASTM D635. Matched fittings shall be made from NSF-listed flame retardant polypropylene with an average maximum burn time of 80 seconds and maximum extent of burning of 20 mm in accordance with ASTM D635. If NFRPP pipe is specified, it shall be made from NSF 14 listed and CSA certified Schedule 40 PP as manufactured by IPEX. The pipe shall comply with ASTM F1412 and the material used shall comply with the material requirements of ASTM D4101.

Fittings shall be NSF listed, be of all-plastic construction, and be designed to lock into a machined groove on the mating piping. All fittings shall have integrally molded union connections. No metallic grab rings or clamps shall be allowed. Fittings containing EVA (ethylene vinyl acetate) are strictly prohibited. Couplings shall not be added to make mechanical joint fittings. Fittings shall be Labline or approved equivalent.

Connections between polypropylene pipe and matched fittings shall be made using the Labline Joint.

Installation and testing shall be in accordance with the contract drawings, the manufacturer’s recommendations, and the local plumbing codes. Testing with compressed air is prohibited. The entire system shall be installed free of stress and in proper alignment. Horizontal supports shall provide a wide bearing area and be free of burrs or sharp edges. Support spacings shall be in accordance with the manufacturer’s recommendations and local plumbing codes. Vertical piping shall have riser clamps on each floor. Pipe supports shall be installed so that horizontal piping is in uniform alignment and with a uniform slope of at least 1/8” per foot, or in accordance with the local plumbing codes.

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