I installed this pump as an internal return pump that will return saltwater from the sump at a standard weight of 90g and a head of about 5 feet. So far I haven't had any problems with it and it has worked great. I have a ball valve after the pump and use it with a limit of about 50% because it's very strong. I soak the vinegar about every 3 months and clean the filter a month or two to get rid of the crap it sucks up.
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