All our PVC ball valves come threaded and are good to 80 PSI.

Larger sizes are available as are solvent weld valves, just contact us to order.

These valves are normally used to isolate/shut off the system from the water supply in order to work on or repair the valve manifolds. 

It is highly recommended to have an isolation valve just outside the home before the water supply enters the control valve manifold or mainline.