On Apr 6, 4:56*pm, wrote:
On Wed, 6 Apr 2011 08:30:09 -0700 (PDT), JIMMIE

OK I went ahead and goggled. Coupling should have a shear shield when
buried . This is a stainless steel band that wraps around the coupling
From the looks of things this come with the coupling and is not an add-
on.


Called an MJ (Mechanical Joint)

That's a really odd term as all flexible coupling joints are
mechanical joints. The only term I've ever heard used for a shielded
flexible coupling is shielded flexible coupling.

http://www.fernco.com/plumbing/shielded-couplings
http://www.grainger.com/Grainger/fle.../N-a85Z1z0ytb9
and that's the ASTM term as well:
http://www.astm.org/Standards/C1541.htm

R