The well cap is the cover on top of the well casing that sticks out of the ground. It serves many purposes. Most caps, which are usually aluminum, include a vented screen so that the pressure difference between the inside and outside of the well casing may be equalized when water is pumped from the well. However, the cap’s main function is to keep contaminants out of the water supply.
Canpipe stocks well caps starting with 2 ⅜” to 8 ¾” O.D in both aluminum and cast iron.
Canpipe also carries more economical aluminum locking well caps which are ideal for monitoring wells.