A. The short answer here is âUsually- yes.â A check valve is a one-way valve. It gets installed in the discharge pipe of your sump pump. When the pump runs, the water is forced out through the valve. When the pump shuts off, gravity wants the water in the discharge pipe to fall back into the sump pit.
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How much do transition lenses cost? Depending on a few factors, such as the material, type and coating, the costs will range anywhere from as little as $150 to as much as $350 for just the lenses without insurance. This price wonât include your prescription or the frames. By the time you add in the prescription, frames and the lens, the average consumer reported paying anywhere from $250 to $450 without any insurance. Those who did have a vision insurance policy reported paying 10 to 50 percent of this price.