Hi! My house was built in 1928 and has the original canister drain system. It is draining extremely slow. We were told that to gain access to the drain to unstop it would be no problem but putting everything back together would be. This company would update the pipes and charge around 2,000. We can not afford to update right now. Is there something we can do with this old canister system to open up the drain? Does anyone have experience with this? Thanks in advance for your help.