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Registered
Join Date: Jan 2002
Location: Long Beach CA, the sewer by the sea.
Posts: 38,167
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908 is correct. A pool heater only uses a 3/4" fitting at the heater, but since the heater itself is usually located a good distance from the house supply, the plumber will tap the meter with a 3/4 and then immediately use a reducer to a much larger size, depending on the distance to the PH. I've seen 2" a lot. Even 2 1/2".
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