THE SHARKBITE® PUSH-FIT FITTINGS are listed by IAPMO and are certified for potable and hydronic heating water distribution (note: Glycol mixture for hydronics is not to exceed 50% concentration). The SharkBite® Push-Fit fittings have been certified for underground applications and as a manufactured joint without access panels and they meet UPC, IPC and cUPC requirements. Visit www.cashacme.com.Cash AcmeCIRCLE 121 on inquiry card