.

Likewise, how does a 3 way pool valve work?

In effect a 3-way valve operates as a Tee fitting, with adjustable flow rates to or from each pipe attached to the valve. A simple pool may have one 3-way valve installed in front of the pump, to control the flow from the skimmer and main drain. This results in 25% flow from the drain, and 75% flow from the skimmer.

Beside above, should pool skimmers be on all the time? Although it's generally recommended that all the pool water undergo filtration every 24 hours, the pump does not need to run all the time. A proactive, productive and energy-saving maintenance activity is to remove the debris floating on the pool surface with a hand-held skimmer.

Keeping this in consideration, should skimmer valve be open or closed?

A normal pool valve setting would have the skimmer valve(s) fully open, main drain half-open and spa drain fully closed. To operate a suction pool cleaner or manually vacuum the pool, you can close other skimmers, or close the main drain, to obtain more suction through the skimmer you are using.

Does my pool need a check valve?

Raised Pool Pumps The most common use for a check valve is to hold the water in the pump when the motor shuts off. When doing so however, you will need to install check valves on all vertical suction pipes, unless one pipe normally has a closed valve, like a spa drain pipe.