My furnace condensate pump would cycle on and off as water from the drain hose that carries water upward to a sink would drip back into the pump. I spliced this into the drain hose and the frequent cycling which would reduce the life of the condensate pump has ceased. I did need some fittings from Home Depot to make this back flow preventer adaptable to 3/8 inch tubing. This item offers heavy duty brass construction so it should last forever.