Polymer walls for vinyl-liner pools will bend, bow and crack by freeze & thaw conditions that expand and push the backfilled-dirt on the plastic wall. Polymer walls will not rust like steel, but they don't have the strength of steel pool-walls in the ground.
Galvanized steel walls are much stronger than polymer walls but, unlike polymer, can rust & corrode.
You must powder-coat galvanized steel walls, to prevent rusting & corroding,with a Polyester powder-coat. published by: paradisepoolandspa.com
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