RLD series top-ported duplex filter for return line applications provides continuous filtration via an integrated pressure equalization valve when shutting down a system to change out a filter element is not an option. Lightweight aluminum construction is water tolerant. Threaded bowl enables easy element replacement. Two element lengths are available in synthetic Z-Media or metal mesh media. It can sustain pressures to 350 psi and flows to 100 gpm. Filter housing has standard Viton seals, as well as upstream and downstream pressure ports.