Im new to swimming pools and have a question regarding the pump skimmer basket. I seem to have a clog in one of my skimmer lines and plan on using a drain king from the pump skimmer line to unclog the skimmer line. My problem is I cannot get the water to stop coming out of the pump skimmer line. I tried closing all valves but I cannot draim the water out of the pump skimmer basket. Is there a combination of valves I should be opening and closing or do I have a valve failure? Any help would be most appreciated.