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Bunyip, my understanding is the larger the pipe this less the head restriction.
I go 2".
Still very pleased with the preformance of my Red Devil. I'm thinking of investing in 'many' more.
The meter is telling me I'm using 95 watts for near 2,500 gallons an hour at this point in time (14,000 pump).
That's good enough for me!
Maurice.
Maurice.
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