Quick Answer
SHALLOW WELL CASING MATERIAL SELECTION REQUIRES CAREFUL CONSIDERATION OF STRENGTH, CHEMICAL RESISTANCE, AND CORROSION PROTECTION TO ENSURE LONG-LASTING PERFORMANCE AND WATER QUALITY.
Material Options
For shallow wells, the most suitable materials for casing are high-density polyethylene (HDPE), PVC, and fiberglass. HDPE is the most popular choice due to its high strength, resistance to abrasion, and chemical stability. When selecting HDPE casing, consider a minimum wall thickness of 1.9 inches (48.3 mm) to ensure structural integrity.
Corrosion Protection and Chemical Resistance
Fiberglass and PVC can be used in corrosive environments or where chemical resistance is a concern. Fiberglass is ideal for wells with high pH or alkalinity levels, while PVC is more resistant to acidic conditions. To ensure chemical resistance, consider applying a protective coating or liner to the casing, such as a polypropylene or fluoropolymer coating. Apply a minimum of 1/4 inch (6.4 mm) of coating to the inside of the casing.
Well Depth and Diameter Considerations
For shallow wells, a casing diameter of 4-6 inches (10.2-15.2 cm) is typically sufficient. However, for deeper wells or larger diameters, a larger casing may be required. Consider the yield strength of the material when selecting the casing size. A general rule of thumb is to select a casing with a yield strength of at least 2,000 psi (13.8 MPa) for shallow wells. Always consult the manufacturer’s specifications and follow local regulations for well casing installation.
Find more answers
Browse the full Q&A library by topic, or jump back to the topic this question belongs to.