Well Casing is the tubular structure placed in a drilled hole to maintain the well opening. Lining the borehole, well casing prevents formation collapse and confines the ground water to its zone underground and prevents contaminants from mixing with the water.
CertainTeed Certa-Lok™ PVC well casing
is the industry leading choice for lining as well as monitoring potable drinking water wells. Certa-Lok™ well casing utilizes CertainTeed’s field-proven spline-locking design to form a full strength joint instantly in all weather conditions. It does not require the use of solvents, arc welding or reinforcement screw attachments.
Certa-Lok™ well casing pipe provides a restrained joint by utilizing precision-machined grooves on the pipe and in the coupling/integral bell which, when aligned, allow a spline to be inserted, resulting in a fully circumferential restrained joint that locks the well casing pipes together. A flexible elastomeric seal (O-ring) in the coupling and/or integral bell provides a hydraulic seal.
There are several reasons why PVC is now used as the preferred well casing material for smaller diameter residential systems and large public water supply systems.
- Long Life: PVC is completely immune to electrolytic and galvanic corrosion, so it won’t rust or rot like most metal pipe. PVC water inlet screens are also inherently more resistant than conventional steel products to clogging and encrustation, which means the amount of water a well can deliver, will not be significantly reduced over time.
- PVC’s excellent chemical resistance makes it immune to virtually all chemicals normally found in wells, including chlorine-based disinfectants and the highly corrosive acids used for well rehabilitation.
- NSF approved as safe for use with potable water.
When you combine these features with the added benefits of economy, strength and reliability, it’s easy to see why Certa-Lok PVC well casing
has become the material of choice among modern well drillers.