4 would be right from what i've read.
The required fill-up is access to a public sewer.
Public sewer:
- We own and maintain the public sewers, which are frequently found in the front, side, or back of residential houses (shown as pink pipes in the illustration below). Sewers that service a single property but are shared by two or more properties, or that serve a single property but are outside of the property line, are almost always considered public.
- A sewer is a pipe that connects to multiple properties. Public sewers are sewers that are connected to the public sewer network.
- A sewer that is managed by public authorities and in which all owners of neighboring properties have equal rights is referred to as a public sewage.
- Before you may join, you must receive permission to discharge waste into the public sewer. The section 106 application forms are often available on the website of your local water authority. This application is sent directly to your local water authority.
Learn more about public sewer here brainly.com/question/28113281
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