Step 4 · Insert the Bladder into the Drain
Carefully feed the garden hose and the attached drain cleaning bladder into the open cleanout pipe. Push the bladder at least 12-24 inches past the opening. It is critical that the bladder is well inside the pipe, preferably past the first pipe junction (Y-fitting), to prevent it from shooting back out under pressure. The goal is to position it just before the suspected clog.