There are fresh concerns that people will think they can drop the wet wipes into household plumbing after the Australian Competition and Consumer Commission lost its appeal over a ruling that Kimberly-Clark had not misled customers when it said its wipes were flushable.

In its 2019 Federal Court lawsuit, the ACCC contended the wipes were not suitable to be flushed because they caused harm to sewerage.

Juma Abbas from Wagga firm Laser Plumbing said flushing the wipes down household toilets could lead to big problems.

He warned that wet wipes could clog pipes, necessitating a potentially expensive call to a plumber to have the problem fixed.

"It can take several hours and it can get really messy," Mr Abbas said.

Mr Abbas said he and his colleagues had seen an increase in the number of blockages caused by wet wipes since coronavirus hoarding sparked toilet paper shortages.

But it is not just individual households that could be faced with an expensive clean-up bill.

Wagga City Council has also warned that so-called flushable wipes could cause issues in the city's sewer system.

Council's director of commercial operations Caroline Angel warned that the wipes did not break down and instead, clogged the system.

"We want to avoid pipe blockages, clogged pumps and the creation of 'fatbergs'. This happens when fats get caught in the wipes and they just keep growing like a snowball," she said.