APT bulkhead boots boast an enlarged gasket area to seal against the sump wall and incorporate the proven advantages of the APT standard flexible entry boot seal. The bulkhead boot requires only a single hole to be drilled for installation, reducing labor time and cost. APT offers a complete line of sizes for ½" through 2½" single and secondary contained pipe. The 1½" through 2½" sizes are also available in a ducted boot version to accommodate the use of APT DCT-400 corrugated ducting for easy retractability.