NOSOK Replacement Sock and Silencer Cup

Stop Wrestling With Filter Socks If you’re over the constant cycle of rinsing, bleaching, and replacing filter socks, the NoSoK Filter Sock Replacement Silencer Cup is a breath of fresh air. It fits right into standard 4-inch and 2.75 inch sock holders and lets you run your sump without socks at all — all while reducing splashing and keeping water flow steady. Pair it with your favorite media and you’ll still catch plenty of detritus, just without the constant upkeep. It’s a simple, durable upgrade that makes sump maintenance a whole lot easier.