Homeowners are spending thousands of dollars on sewer "liners," which are illegal in the city and ultimately cause more problems, licensed plumbers and city officials warned.
Sewer liners are made of fiberglass and are installed inside existing pipes. The fiberglass narrows the flow, eventually causing more blockages and backups for neighbors who share a sewer line, licensed plumbers said.
More than a dozen ads in the phone book tout the illegal service.
One Brooklyn homeowner (pictured) spent more than $7,000 on liners only to find out they didn't work.
Real plumbers warn of illegal 'fix-up'