Review on King Brothers Inc GVP 1000 S Schedule by David Merculief

Edit 12/23/2017: After 5 months (received the product in June but didn't start using it until July) of normal use in the reef aquarium's sump system, there was a leak in the valve area nearby of the valve (see photo). Picture). Right now it's about 2-3 drops per minute but obviously I can't keep using this without risking the leak getting worse. The valve still rotates very smoothly, but leakage is unacceptable. I will have to replace this valve, most likely I will look for another brand.================================ == == =========================================== == === ================ I used it to weigh the Herbie overflow system. This thing is solid and the valve works great, spinning very smoothly and staying where you put it. You can not ask for more.