It is an objective of the present invention to provide lawn irrigation sprinkler heads that include a self-sealing feature should the head become damaged or destroyed.  It is a further objective to provide such sprinkler heads that function to prevent leaks without human interaction.  It is a still further objective of the invention to provide sprinkler heads that will permit other sprinkler heads on a circuit to function with the loss of one or more heads on a circuit.  It is yet a further objective to provide self-sealing sprinkler heads that are reliable and relatively maintenance free.  Finally, it is an objective of the present invention to provide such sprinkler heads that are durable, inexpensive and easily installed.

            While some of the objectives of the present invention are disclosed in the prior art, none of the inventions found include all of the requirements identified.