I have a 10 year old RT 3. I got rid of the plastic tank a few years back and went with the aluminum one. Replaced all connections with new hose. I have never had an issue with leaks or venting. As per the advice of other threads on here, I never top it off. When the pump clicks off, that's it, I stop filing. Also, I couldn't give the plastic tank away. It went in the trash.
Fred
