Weld-On 13558 744 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 interference fits up to 6 inches in diameter (and up to 4 inches for Schedule 80). It is formulated specifically for pool and spa PVC pipe applications (including foam core piping). And thanks to its regular-bodied viscosity and fast relative set time, this PVC solvent cement applies smoothly and sets quickly to help facilitate efficient PVC welding. Weld-On 740 Pool PVC Solvent Cement can be used without primer on non-pressure systems if local codes permit.