Item 792029 model p3000 33.
Pvc rubber coupling underground.
Pvc underground drainage slip coupler.
Flexible transition couplings for underground piping systems.
No hub or shielded couplings can be used above or below ground because the shield provides extra strength to the coupling.
A slip coupler has no centre stop when lubricated it can be easily.
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.
A mike casey a licensed plumbing contractor and co author of code check plumbing responds.
Fernco 3 in x 3 43 in dia shielded specialty coupling pvc fitting.
For home use it comes in diameters ranging from 1 1 2 to 4 inches lengths are generally 8 or 12 feet long.
1 1 these specifications describe the properties of devices or assemblies suitable for use as flexible transition couplings hereinafter referred to as couplings for underground drainage and sewer piping systems.
You should not replace a shielded no hub coupling with a flexible rubber coupling if it is an above ground installation or repair.
So as it turns out these fittings are indeed rated for direct burial.
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.
Made of tough elastomeric polyvinyl chloride pvc the flexible couplings are strong resilient and unaffected by soil conditions.
They re designed for nonpressure drain waste and vent applications.
Flexible rubber couplings are for use underground.
The pipe sections are tough and durable and they join together using couplings primer and cement.