Description Stanadyne Roosa Master Hand Primer Plunger Assembly 23457 Note: This Stanadyne / Roosa Master Hand Primer is no longer being produced by Stanadyne directly. They are instead commissioning Parker Hannifin to manufacture them. In this regard, our hand primer assemblies 23457 are OE. Fitment Guide: There are many applications that use this assembly and all of them are pretty old at this point. We don’t have a hard and fast list of compatible equipment on hand, but if you want to make sure this is the right part, you can still reach out to us, and we’ll do the research on your application and verify it’s fitment. Otherwise, please refer to the break-down picture and see if it matches the configuration of the hand primer assembly you are replacing. Again, if you are not completely sure this is right for your application, please send us your complete pump model number. We’re happy to help!
