The break started around 6 a.m. near the 2800 block of Holme Avenue and utility workers had it shut off by 6:30 a.m.
But a large amount of muddy, messy water flowed along the roadway and into nearby Pennypack Creek.
A neighborhood community center near the break is without water service.
SEPTA bus routes 20 and 50 are being detoured because of the break. You can get all the latest SEPTA alerts on our 6abc.com Traffic Channel.