Sewerage water streamed into a Romford hamburger restaurant while diners were eating, on Tuesday.
Customers were evacuated after clear toilet water leaked from a burst overhead pipe at Wimpy in Romford Market Place.
The leak came from a blocked cistern at upstairs solicitor’s office Grove & Dean, around 3pm.
Plumbers were called in to unblock the pipes, which were streaming toilet water through the roof into the restaurant below.
Owner of Wimpy, Bhopinder Gill, said: “There was no one sitting where the leak was, so as far as I know no one was hit by the water.
“As soon as it started leaking, about 30 seconds later, I evacuated everyone.”
Wimpy remains closed while the manager works to repair water damage, including missing tiles from the roof.
A Havering Council spokesman said environmental health officers had visited the restaurant and were satisfied Wimpy was taking the proper measures to ensure food was being served in a hygienic way.
A Grove & Dean spokesman said: “There was a blockage that was leaking. We called the plumbers who flushed it through and there is no longer a problem.”
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