One of our most popular sewage basin covers, the Jackel-SF114 provides a gas and radon tight seal to any of our 18 in dia basins. The split design allows for easy access to the sewage pump without removing the vent pipe and the whole cover. The SF114 includes our molded, reusable PVC seal that provides a gas and odor tight seal. Constructed of heavy duty structural foam and injection molded the SF114 has proven to be workhorse for the professional tradesman.