How much effort required to pulling the piston upward?

If a cylinder size of 15 cm dia and 40 cm length kept vertically, piston pushing up word side at bottom and discharge pipe without valve connected vertically  at top side and imagine piston position at bottom ddc discharge pip length 600cm and dia 6cm ,pipe and cylinder filled with water now my question ignore piston, piston road weight and friction load, how much effort require pushing the water to outside if strock speed 4 strock per minut.

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