Restroom trailer for a wedding: does it need a water hookup?

Question

My fiancé and I are planning our wedding for next spring at my parents' property in Charleston. We expect 140 guests for a six-hour evening event with a catered dinner and an open bar. We are considering a restroom trailer instead of a group of standard units to make it feel more like a proper wedding. The property has a large, flat grassy area next to the tent where a truck could easily park for delivery and pumping. My main question is about water. The venue is completely off-grid with no water source nearby.

Can a restroom trailer for a wedding operate with just its onboard fresh water tank? I'm trying to understand the logistics. Does the size of the tank determine how many flushes we get for 140 people? Would we need a service visit halfway through the event to refill the water and pump the holding tank?

Nina R. · Answer

A restroom trailer for a wedding can operate with just its onboard fresh water tank if it is large enough for your guest count and event duration. The size of the fresh water tank and the holding tank determines how many flushes you get and how often pumping is needed. For 140 guests over six hours with an open bar, you will likely need a larger restroom trailer model with ample tank capacity to avoid a mid-event service visit. Restroom trailers are designed to be self-contained, but you must confirm the tank sizes with your rental company and discuss your specific needs. They will calculate based on the number of fixtures, expected use, and duration. Ensure the unit is placed on level ground and that you have arranged for power, typically from a generator. After the event, a vacuum truck will service the unit to pump the waste and refill the fresh water and deodorizer if needed for extended use.

Restroom trailer for a wedding: does it need a water hookup?

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