The Waterway 711-1740 poly jet old-style gasket is designed for compatible poly jet wall fitting applications. A gasket in this position is useful because it helps preserve the seal around the jet fitting while matching the older design style used in certain Waterway assemblies.Version-specific parts matter when servicing older jet fittings, and using the correct Waterway gasket helps reduce the fit issues that can come from substituting a newer style into an older assembly. It is a practical replacement when maintaining the original design format is important.For compatible old-style poly jet service, this Waterway gasket is a practical choice when restoring the sealing surface around the wall fitting. Waterway old-style poly jet wall fitting gasket Designed for compatible legacy-style jet applications Helps restore sealing around the fitting Useful for repair and rebuild work Supports cleaner compatibility in older assemblies