Clear-Lock Coupler: Clear midsection gives added visibility during installation, removing all guesswork from the process. Visual confirmation of the pipe within the coupler ensures that it has been properly seated at the center stop. Slightly shorter than the original Push-Lock, the Clear-Lock is ideal for pull boxes, vaults or other limited access areas. Non-metallic construction provides excellent corrosion resistance in buried or encased applications and also has desirable dielectric properties. Simple, one person 'push-on' assembly; self-locking ring design is re-enterable. Pre-lubricated O-ring provides watertight and airtight seal; suitable for both cable pulling and jetting applications.