I work with bearings everyday, many are water
lubricated shaft bearings.
We tend to work with phenolic composite bearings as these have performed better than rubber in many situations. But the fitting techniques apply to all. Bearings are built to close tolerances on the shaft and allow for a running clearnace as well as moisture and thermal expansion, if you have a press fit bearing the ID has to allow for the fact that it will be smaller when pushed in.
We use epoxy fit whenever possible, but the bearings are sized for this so the fit should be something that the bearing supplier tells you. We supply bearings with different ID and OD if the user wants to push fit (interference fit)
Epoxy fitting works well if the bearings are designed for it, it also helps removal
. Just make sure to use an epoxy that has a low melting point, there are other techniques that our suppliers recomend for their bearing material when fitting in GRP tubes that can't be heated.
To be neutral commercially on the site your options in composite bearings include Orkot, Thordon, Railko, Maritex, ACM, CIP and a few others I can't recall
. Or search for composite shaft bearings many are Lloyds approved for shipping
but can still be supplied down to 1" shaft size.