** est. 1975 **
This gasket installs behind the front cover on many older Wagner diaphragm sprayers. This gasket is sometimes accidently torn/damaged when removing the front cover. So it is advised to purchase one if you plan to remove the front cover to clean out the hydralic chamber.
This gasket will fit all pump-parts sections that it appears in. But also may fit others not listed.
Item number 3 as shown below in general breakdown.