In the last six month I have replaced the shaft seal and the impeller seal two times, but the pump continues to leak (see picture below). I have done this properly. I have changed the seal plate as well thinking it might have a crack but still no fix. I'm thinking to replace the impeller as I notice some wear and tear in the impeller seal area. Anybody ever encountered a leak form impeller.? I don't know what to do. But it still leak from the shaft seal as you see from the picture. I toke it with face camera phone while the pump operates. Any suggestions.?