Check valves are installed
(A) On the delivery side of the pumping set
(B) At the interconnections between polluted water system and a potable water system
(C) Both (a) and (b)
(D) Neither (a) nor (b)
(A) On the delivery side of the pumping set
(B) At the interconnections between polluted water system and a potable water system
(C) Both (a) and (b)
(D) Neither (a) nor (b)