We have recently purchased an old apartment building built around 1920. In the process of updating the first floor apartment we noticed water leaking from the ceiling into the bathroom. The second floor bathroom is directly over the first floor bathrrom. We checked on the second floor and someone had been using the tub. It was still halfway full and draining very slowly. When I look at the drainpipe coming through the first floor ceiling, there is no trap visible. The second floor tub is an old cast iron tub with a skirt all the way around, so I can't see underneath the tub. Is it correct to assume that there is an old drum trap underneath the tub that is leaking and that we will have to tilt the cast iron tub in order to gain access to the drum trap??? Are there any other types of traps that may have been used (besides drum, p-trap and s-trap....)?
Thanks in advance!!