When I had my first IS installed in 2009 Ben and Sergio both told me they only used the 1600 PSI pump.
That said, if you are thinking about changing pumps, Titan has a pump that is 5 pistons instead of 3 pistons that the Carlisle has.
Supposed to spin up faster and minimize the delay.
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Thanks,
Duane
2019 DRV MS 39DBRS3
2020 F-450
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