carey
Aquarium Advice Addict
good quality, or bad quality, putting a ball valve at the exhaust port of a pump will help it to last longer. it will not hurt a pump EVER.
Not to jump in, but I;ve heard the complete opposite. That if you are throttling back your pump you are slowly burning it out.
I have a ball valve on mine between the pump and output and mine is dialed back quite a bit since I got a pump that was too much flow.
Thanks!