Kraloy® couplings, terminal adapters and female adapters retain their original properties after years of exposure to heat and weather. Kraloy® couplings, terminal adapters and female adapters resistance to fungi, bacterial action, rodents, termites and corrosive agents ensures a long, trouble free live for PVC conduit installed indoors or outdoors. Couplings and adapters are designed and engineered to be concrete tight in all weather conditions.