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Yelomine Pipe

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Certa-Lok Yelomine

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The unique Certa-Lok Yelomine joining system and physical properties limit possible applications to only the imagination and ingenuity.

Certa-Lok Yelomine pipe and fittings are available in 50mm through 400mm diameters, inpressure classes of 7 bar to 24 bar Certa-Lok Yelomine is manufactured with IPS outside diameters and is available in 6m laying lengths.

CertainTeed Certa-Lok Yelomine is manufactured from a specially formulated PVC compound that contains impact modifiers and UV (Ultraviolet) inhibitors. These modifiers and inhibitors provide higher impact strength over an extended period of time and allow Certa-Lok Yelomine to be used in above-ground, exposed applications as well as underground or buried applications.

The inherent properties of PVC provide a product that will not rust or corrode, and is extremely resistant to harsh environments, acids and most chemicals.

Certa-Lok Yelomine pipe, couplings and fittings provide a restrained joint by utilizing precision-machined grooves on the pipe and inthe coupling which, when aligned, allow a spline to be inserted, resulting in a fully circumferential restrained joint that locks the pipe and coupling together.

A flexible elastomeric seal (O-ring) in the coupling provides a hydraulic pressure seal.

The Certa-Lok Yelomine joints can be easily disassembled, allowing for system changes, extension, movement or reuse of the entire system.

Non-Corrosive/Chemical Resistant

Certa-Lok Yelomine is an excellent product for harsh environments. The inherent properties of PVC provide a product that is a non-conductor, which will not rust or corrode. Certa-Lok Yelomine is a product that does not require any cathodic protection, coating, wraps or other corrosion protection. PVC is extremely resistant to acids and most chemicals, and is unaffected by "hot" (aggresive) soils. Certa-Lok Yelomine has an outstanding resistance to scale and scale build up. And, if necessary, it can be cleaned by pigging the line.

Special splines and O-rings may be required in either extremely acidic applications or hydrocarbon environments.

High Flow Rate

Certa-Lok Yelomine offers a smooth, non-wettable interior surface that accounts for a Hazen-Williams flow coefficient of C=150.

Light Weight

Two inch Certa-Lok Yelomine weighs less than 1.50kg per metre, 12" diameter weighs only 15kg per metre. This means most pipe sizes can be easily handled manually, even in 6.1m lengths, thus eliminating the need for heavy lifting equipment and providing the ability to get into those hard-to-reach areas, like those found in coal mines and tunnels.


Certa-Lok Yelomine can bend easily around many obstructions, typically reducing the number of fittings required. When assembled couplings (joints) are not affected by standard pipe line bending, the pipe must not be bent to a lesser (tighter) radius than shown to the right.

Joint Assembly

Certa-Lok Yelomine PVC Restrained Joint


Clean interior of coupling and pipe spigot. Use a clean rag or paper towel to remove all foreign material. Make sure gaskets are clean and evenly seated in the gasket groove.


Align the Pipe and coupling and push the pipe into the coupling. When the pipe end seats against the stop in the coupling, spline grooves are automatically aligned for spline insertion.

The spline is then inserted throught the spline insertion hole in the coupling and into the aligned grooves, until it has traveled a full 360ยบ and is seated against itself.

The spline securely locks the coupling to the pipe. The gasket in the coupling is designed to provide a hydraulic seal. Note: If needed, the joint can be disassembled and re-used to allow for system changes, extension or removal for re-use.


Suitable for:

  • Above-Ground Pressure Lines
  • Buried Pressure Lines
  • Bridge Crossings
  • River & Creek Crossings
  • Drip Irrigation
  • Solid Set Irrigation
  • Slurry Lines
  • Supply Lines (Permanent)
  • Supply Lines (Temporary)
  • Temporary Bypass
  • Industrial Piping
  • Process Piping
  • Acid Waste
  • Tough Terrain
  • Aeration Supply Lines
  • Boat Dock Water & Sewer Lines
  • Sewer Force Mains
  • Unstable Soil Applications
  • Oil Field Lead Lines
  • Oil Field Salt Water Disposal
  • Bridge & Highway Drainage
  • Center Pivot Sprinkler Lines
  • Fire Protection Lines
  • Temporary Potable Water & Fire
  • Supply Lines for Recreation Areas
  • Leachate Collection
  • Methane Gas Collection
  • Road Crossings
  • In-situ Mining Wells
  • Heap-Leach Mining
  • Vacuum Lines
  • Dewatering Systems
  • Effluent and Reclaimed Water Lines
  • Emergency Water Systems