Often referred to as fernco fittings after the name of a major manufacturer flexible neoprene and elastomeric pvc couplings are available in dozens of sizes and configurations.
Pvc rubber coupling underground.
They re designed for nonpressure drain waste and vent applications.
A slip coupler has no centre stop when lubricated it can be easily.
Flexible transition couplings for underground piping systems.
Flexible rubber couplings are for use underground.
Polyvinyl chloride or pvc pipe is used for both sewer and vent pipelines.
Made of tough elastomeric polyvinyl chloride pvc the flexible couplings are strong resilient and unaffected by soil conditions.
You should not replace a shielded no hub coupling with a flexible rubber coupling if it is an above ground installation or repair.
Fernco 3 in x 3 43 in dia shielded specialty coupling pvc fitting.
So as it turns out these fittings are indeed rated for direct burial.
A mike casey a licensed plumbing contractor and co author of code check plumbing responds.
Item 792029 model p3000 33.
They are also resistant to chemicals ultraviolet rays fungus growth and normal sewer gases due to the inert nature and physical properties of the pvc material.
Double socket with integral rubber seals allows insertion of plain ended pipe or fittings.
Pvc underground drainage slip coupler.
For home use it comes in diameters ranging from 1 1 2 to 4 inches lengths are generally 8 or 12 feet long.
The pipe sections are tough and durable and they join together using couplings primer and cement.