WAC 173-160-211. What are the recommended well diameters?

TABLE 3 Recommended Well Diameters Anticipated Well Yield in gpm Nominal Size of Pump Bowls in inches Optimum Size of Well Casing in inches Less than 100 4 6 ID 75 to 175 5 8 ID 150 to 350 6 10 ID 300 to 700 8 12 ID 500 to 1000 10 14 OD 800 to 1800 12 16 OD 1200 to 3000 14 20 OD 2000 to 3800 16 24 OD 3000 to 6000 20 30 OD Anticipated Well Yield in gpm Nominal Size of Pump Bowls in inches Optimum Size of Well Casing in inches Less than 100 4 6 ID 75 to 175 5 8 ID 150 to 350 6 10 ID 300 to 700 8 12 ID 500 to 1000 10 14 OD 800 to 1800 12 16 OD 1200 to 3000 14 20 OD 2000 to 3800 16 24 OD 3000 to 6000 20 30 OD