In general, basements have higher humidity than the outside air. Luckily, there are a few steps you can take to fix your sewage sump pump. Battery Sump Pump Installation Montclair: If you are considering sump pump installation in Montclair, NJ, there are a few factors to consider. This can be a tricky proposition, as you don't want to overdo it, but the best way to do this is to do a little research. You can also get a good price on a sump if you shop around. Next, backfill the area with loose stone.