Oatey PVC heavy duty medium set clear cement is recommended for DWV, pressure pipe, potable water and electrical applications. Its thick formula fills gaps in large diameter pipe and loose-fitting joints and is easy to apply. This clear, heavy duty, medium set cement can be used to solvent weld all schedules and classes of PVC pipe and fittings with interference fit up to 18 in. diameter for non-pressure and 12 in. diameter for pressure pipes.