It is made of PVC (polyvinyl chloride) for chemical and corrosion resistance, high strength, and less weight than fittings made from metal, and has an EPDM (ethylene propylene diene monomer) seal for resistance to oil, water, and some solvents. It is compatible with schedule 40 and schedule 80 PVC pipes and fittings and is suitable for cold-water pressure distribution systems including irrigation, pool and spa, potable water, and chilled water applications.