Eliminate internal water bypass and stop steady trickles from your waste line with a genuine replacement spider gasket built for 2-inch multiport valves. Inside the control valve, this multi-spoke elastomeric web channels pressurized water precisely where your handle points—whether backwashing, rinsing, or recirculating. Over time, chemical exposure and constant handle turning can stretch, nick, or unseat original rubber spokes, letting dirty pool water sneak around the diverter key and bypass the filter media altogether. Installing a fresh, precision-molded spider gasket restores firm internal compartment separation, maintaining proper filtration pressure and protecting your pool from unintended water loss.