Select the items you wish to purchase:
Shut off your main water supply.
Determine which valve(s) are not working.
If it is a jartop valve, unscrew the top. If it is not a jartop valve, remove the top of the valve by unscrewing it from the base. Set the inner components aside in a safe place.
Remove the rubber diaphragm from the valve.
Check of debris and install the new diaphragm. (Verify that you have the correct replacement diaphragm.)
Reinstall the spring on to the diaphragm.
Reinstall the valve top and ensure it is tightened down.