This complete pipe penetration system has Link-Seal modular seals designed for use as a permanent pipe penetration seal with 16 available sizes; 20 psi (40-ft static head). Century-Line HPDE Sleeves are sized to work with Link-Seal modular seals. The sleeves are ? the weight of steel sleeves, are easy for one person to install without the need for a hoist/crane and create hole diameters 2 to 25 in.