Some of the leaks can be a connection, either a compression ring or a threaded unit, I have had both, one on the valves that directed the water and the second on the connection to the accumulator, tightened the first re made the valve set up since it was wasting space, gained one cubic foot of storage.
Look for all the crimped connections and check as others suggested at the drain valve, I had to make protection barriers on mine so that the storage of items did not open the valves under way or when we retrieved an item.
navegator