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What is the primary indicator used to determine when a pool should be backwashed?
Wiki User
∙ 9y ago
Your D.E. filter should have a pressure gauge on it. When the pressure reaches about 20 psi this is an indication your water flow is slowing down due to trapped debris in your D.E so a backwash is necesssary to flush it out.
Wiki User
∙ 9y ago
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