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WEST VIRGINIA (WV) SEPTIC INSTALLER EXAMINATION FINAL EXAM 2026 COMPLETE
QUESTIONS AND VERIFIED SOLUTIONS LATEST UPDATE THIS YEAR
Exam coverage for WV Septic Installer Practice
Exam 1 includes the core onsite wastewater and
septic system knowledge commonly required for
installer preparation in West Virginia. It focuses
on site evaluation, soil and percolation concepts,
septic tank components, drainfield design basics,
pipe layout, setbacks, installation procedures,
system sizing, and troubleshooting of common
failures. The exam also evaluates understanding
of safety practices, permits, inspections,
environmental protection, maintenance
principles, and compliance with applicable West
Virginia onsite wastewater rules and local
requirements. Emphasis is placed on proper
installation methods, protecting groundwater and
public health, reading site/plan information, and
applying code-compliant septic system practices
in the field.
, 2|Page
1. For each bedroom beyond 4, how many gallons must be added to the minimum septic tank
size? - ANSWERS -250 gallons
2. What is the minimum septic tank size required for a single-family dwelling with up to 4
bedrooms in WV? - ANSWERS -1,000 gallons
3. True or False: Metal septic tanks are approved for use in West Virginia. - ANSWERS -False
4. What is the required minimum clearance between a septic tank and a private water well? -
ANSWERS -50 feet
5. True or False: A soil absorption system may be installed under a driveway or parking lot. -
ANSWERS -False
6. What is the minimum trench depth allowed for a standard soil absorption system? -
ANSWERS -18 inches
7. What is the maximum trench depth for a standard soil absorption system? - ANSWERS -36
inches
8. How many inches of gravel must be placed beneath the distribution pipe in a trench? -
ANSWERS -6 inches
9. How many inches of gravel must be placed above the distribution pipe? - ANSWERS -2 inches
10. True or False: The invert of the septic tank inlet must be at least 2 inches higher than the
outlet invert. - ANSWERS -True
11. Which type of distribution system is required on sloping ground? - 2 | P a g e S -Serial
distribution
12. At what slope percentage are soil absorption systems prohibited? - ANSWERS -More than
25%
WEST VIRGINIA (WV) SEPTIC INSTALLER EXAMINATION FINAL EXAM 2026 COMPLETE
QUESTIONS AND VERIFIED SOLUTIONS LATEST UPDATE THIS YEAR
Exam coverage for WV Septic Installer Practice
Exam 1 includes the core onsite wastewater and
septic system knowledge commonly required for
installer preparation in West Virginia. It focuses
on site evaluation, soil and percolation concepts,
septic tank components, drainfield design basics,
pipe layout, setbacks, installation procedures,
system sizing, and troubleshooting of common
failures. The exam also evaluates understanding
of safety practices, permits, inspections,
environmental protection, maintenance
principles, and compliance with applicable West
Virginia onsite wastewater rules and local
requirements. Emphasis is placed on proper
installation methods, protecting groundwater and
public health, reading site/plan information, and
applying code-compliant septic system practices
in the field.
, 2|Page
1. For each bedroom beyond 4, how many gallons must be added to the minimum septic tank
size? - ANSWERS -250 gallons
2. What is the minimum septic tank size required for a single-family dwelling with up to 4
bedrooms in WV? - ANSWERS -1,000 gallons
3. True or False: Metal septic tanks are approved for use in West Virginia. - ANSWERS -False
4. What is the required minimum clearance between a septic tank and a private water well? -
ANSWERS -50 feet
5. True or False: A soil absorption system may be installed under a driveway or parking lot. -
ANSWERS -False
6. What is the minimum trench depth allowed for a standard soil absorption system? -
ANSWERS -18 inches
7. What is the maximum trench depth for a standard soil absorption system? - ANSWERS -36
inches
8. How many inches of gravel must be placed beneath the distribution pipe in a trench? -
ANSWERS -6 inches
9. How many inches of gravel must be placed above the distribution pipe? - ANSWERS -2 inches
10. True or False: The invert of the septic tank inlet must be at least 2 inches higher than the
outlet invert. - ANSWERS -True
11. Which type of distribution system is required on sloping ground? - 2 | P a g e S -Serial
distribution
12. At what slope percentage are soil absorption systems prohibited? - ANSWERS -More than
25%
