In this configuration water flow is better if the hose size increases as they join together at the "T" fitting. Never should the ID of the hose or fitting decrease in size. Once the two hoses join at the "T" fitting the exit diameter of the ID of the fitting must be larger than the original fittings to prevent flow problems. Keeping the ID increasing in size as it continues upward to the water tank creates great water flow due to the venturi effect from the bubbles. Keeping the hose diameter on the water feed hoses to the bottom of the cell keeps good water flow entering the cell from the bottom which improves cell efficiency and allows better cooling.

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