Wet Utilities
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Definition
The underground systems that carry water: domestic and fire water distribution, sanitary sewer, storm drainage, and the pump stations that move them. The term distinguishes this scope from dry utilities, which carry electricity, gas, fiber, and telecom.
Frequently Asked Questions
What is the difference between wet utilities and dry utilities?
Wet utilities carry liquid or are pressurized with water — water mains, fire service mains, sanitary sewer, force mains, storm drainage, and lift stations. Dry utilities carry electricity, natural gas, fiber, and telecommunications, and are typically installed in conduit or concrete-encased duct banks. On a congested site the two share a utility corridor and have to be coordinated so they do not conflict at crossings.
Who installs wet utilities on a commercial site?
A site utilities or underground utility contractor, working either directly for the developer or as a subcontractor to the general contractor. The scope usually runs from the municipal tie-in to a defined point outside the building, commonly five feet from the foundation, where it hands off to the plumbing and fire protection trades.
Conclusion
Wet utilities are the underground water, sewer, and storm systems that a site utilities contractor installs and tests before a building can be occupied.
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