(CPO) Certified Pool and Spa Operator Practice Test
(CPO) Certified Pool and Spa Operator CPO Pool & Spa Maintenance & Operations
What is the primary purpose of backwashing a pool filter?
Select your answer
A
To heat the pool water
B
To remove air from the system
C
To flush debris from the filter
D
To add chlorine to the pool
Need a hint?
(H)
