How to write a work contact letter to the real estate agent when the bathroom supervisor is blocked?

The contact letter from the main toilet pipe to the real estate agent reads: The bathroom water pipe is blocked by the owner's construction, and the owner now questions the rationality of the pipe design. The toilet is blocked and needs urgent maintenance. If the tap water is not smooth or blocked, you need to register with the property office immediately, and the drainage pipeline will be inspected and repaired free of charge.