Energised lip seals work
best and last the longest. The energising ring that encompasses the lip can be steel
, bad, SS better, bronze
better still, rubber the best of all.
The weep hole is designed to warn you of impending failure, not immediate failure and a leaking pump will continue to work
for a considerable time, but will eventually lead to bearing failure and is not good for the surrounding area.
The seals and bearings are readily available from industrial suppliers and easy to replace. There is nothing special about the ones in the repair kits.
Pumps can be rebuilt many times over.
Wear plates can be turned over or the face flattened using an oil
stone. Even a worn shaft can be made to work by using a thinner seal so the wear point is in a different place.
Seals tend to fail after periods of non use, so it is worth keeping a supply on board together with a spare impeller.