From: Jack Olsen
Location: Westbrook, CT
Date: 20 Mar 2004
Time: 06:32:20
Andy, if you are using one of the common centrifigal pumps, they don't want you to use a back flow device. It places too much load on the pump at startup. But if you have a possibility of seawater entering, you must bite the bullet and and install a check valve or an anti-siphon device.