Push rod seals my man ... push rod seals ...

And does water seep in ? all depends ... if you mean with AUTO BAILERs , not supposed to , but , if you get some gook in them , they will , and if you mean with a reversed water pickup , no .
Also , pending on your setup , you may get water in anyway thru the stuffing tube . Pends on how low you have the engine and stuffing tube . ( when stopped of course )