The Sheik, Durga and Ali families share the Welbedacht East home.
Afzal Sheik, 47, who lives with his parents, wife, three daughters and two grandchildren, said the families live in poor conditions, surviving on two pension grants, child support and odd plumbing jobs.
Sheik said contractors were flushing out drains in another area when they noticed water pouring out from their stormwater drain on Thursday. The contractors said nothing could be done because the pipelines were damaged.
A storm on Saturday night caused the pipeline to burst, causing damage to the house when the water surged inside. A one-month-old baby nearly floated away on a mattress, Sheik said.