Coupling gasket with friction-fit range reducer

A seal for a pipe coupling, the seal comprising:

• an outer gasket defining a radially inner surface, the radially inner surface defining a plurality of grooves;
• an inner gasket separably joined to the outer gasket, the inner gasket defining a radially outer surface, the radially outer surface defining a plurality of ridges, each of the plurality of ridges extending radially outward relative to an axis of the inner gasket;
• and
• an O-ring;
• wherein the radially outer surface of the inner gasket contacts the radially inner surface of the outer gasket.

A method of using a pipe coupling, the method comprising:

• comparing an inner diameter of a seal of the pipe coupling to an outer diameter of a pipe element to which the pipe coupling is to be assembled, the seal disposed within a split ring of the pipe coupling, the split ring configured to compress the seal radially inward in a compressed state of the pipe coupling, the seal comprising:
• an outer gasket defining a radially outer surface and a radially inner surface, the radially inner surface of the outer gasket defining a plurality of grooves;
• and
• an inner gasket separably joined to the outer gasket, the inner gasket defining a radially outer surface, the radially outer surface of the inner gasket defining a plurality of ridges, the radially outer surface of the inner gasket contacting the radially inner surface of the outer gasket;
• and
• an O-ring;
• and
• removing the inner gasket from the seal.