Home Depot Liner for Tiling a shower area. It's not rated but I believe it will be adequate for food production. At the end there is a pool wall bulkhead fitting sealed with Marine Goop. The pipe with the valve is 1 1/2 inches with a tree formation at the bottom that splits the water force up to 3 individual 1/2 inch nozzles pointing toward the far end. Adjustment of water level is achieved buy cutting a 1 1/2 inch pipe and inserting it into the bulkhead fitting to what ever height you want.
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