Ames ABC "Latchless" Couplers are well suited to laying pipe on uneven ground, or where gradual twists and turns are needed in the line.  

Ames Male & Female Couplers

Ames steel couplers are pressed into and banded onto aluminum pipe.  The male coupler is pushed into the female and held in place with a spring.

Ames Gaskets & Springs

The Ames Spring compresses and holds the male coupler while the gasket seals the connection.