Highlights: Size: 4" x 4" PVC Clay to cast iron For connecting pipes made of unlike materials such as clay to cast iron Suitable for underground use Not for use on pressurized plumbing systems Meets ASTM C-1173, C-1277, C1460, CISPI 310, IAPMO PS 109, PS90, & CSA B602 WARNING: This product can expose you to chemica