General Pipe Cleaners’ popular Sewerooter T-4 mid-size drain cleaner packs the performance, punch and portability to unclog 3” to 6” diameter lines up to 100’ long, the company emphasizes. With more cleaning power than its T-3 predecessor, Sewerooter T-4 carries 100’ of 9/16” Flexicore cable to clear stubborn stoppages in 3” to 4” inside lines. Heavy-duty 9/16” cable provides more torque than traditional 1/2” cable offers, yet can clean the same size drain lines. Ideal for plumbing, drain cleaning and maintenance pros. General Pipe Cleaners.