It depends, I know that is not the answer you were looking for... please fill out your signature with your equipment so we can have an idea of what you are working with.. kind of like mine below... Trouble Free Pool
each pump has a different flow rating (GPM) and each heater has a minimum flow needed, so if your heater needs 30 gpm and at 30 feet away and 10 foot of head your pump supplies over 30 gpm you are good but if it does not you would need a new pump...
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