Clean your gas of moisture before you return gas to your solvent tank with our 4" ASME molecular sieves. These systems come fully assembled with 6" ASME tri-clamp spools, mesh screens, and (1) flat cap and (1) hemispherical cap. These systems come standard in 1/2" and work well to remove water from your butane or propane extraction system. Rated to 350psi, you can extract with butane or propane knowing your system is safe.