An adjustable coupler is disclosed for interconnecting leaching chambers to create a serpentine pathway for a leaching field. A coupler can connect a first leaching chamber and a second leaching chamber. The coupler can comprise a mating feature and an adjustment feature.The mating feature can be used to mate the coupler between the first leaching chamber and the second leaching chamber. The mating feature can include a swivel connector matable to an end of one of the chambers.The adjustment feature can adjust the angle between the first chamber and the second chamber between a range of angles. The adjustment feature can include a swivel connector. The range of angles can be particularly chosen to be about 45.degree.. More particularly, the range of angles can be about 22.5.degree. in either the clockwise or counter-clockwise direction.