Weld-On 13566 746 Gray Pool PVC Solvent Cement 1 gal delivers bonding strength and stability that contractors can trust for pool plumbing installation and repair. This PVC pipe cement is suitable for use with all classes and schedules of rigid PVC pipes and fittings with an interference fit up to a 12-inch diameter (including Schedule 80). It can also be used for non-pressure applications on PVC pipes and fittings with an interference fit up to an 18-inch diameter. Weld-On 746 Solvent Cement has great gap-filling properties and is recommended for cementing joints where a sizable gap exists between the pipe and the fitting (e.g., large pipe sizes). And thanks to its medium relative set time, this PVC solvent cement excels in warm weather and other applications that may demand a longer working time.