If you have been put in charge of the fall festival and somebody suggested a dunk tank, your first question is probably how does a dunk tank work, because the thing looks a lot more complicated than it is. The honest answer is that it is a seat, a latch, and a metal target, and that is nearly the whole story. The water is the heavy part, literally.
We deliver these across metro Atlanta from Conyers, and the questions we get on the phone are always the same four or five. So here they all are in one place, before you commit to a date.
What is a dunk tank, exactly?
It is a tank of water with a folding seat mounted above it inside a cage, and a target arm sticking out to one side. One person sits on the seat. Everybody else lines up and throws balls at the target. Hit the target and the seat gives way, and the person on it goes in the water.
That is it. There is no motor, no electricity, nothing to plug in. The cage around the seat is there so a stray throw cannot hit the person sitting in it, which is the part people do not always notice until it is pointed out.
How the dunking mechanism actually works
The target is connected to a latch that holds the seat in its up position. The whole thing is a simple lever, the same idea as a see saw. A ball striking the target spins it on its pivot, that motion pulls the latch, and the latch lets the seat fold down out from under whoever is on it.
Then gravity does the rest. The seat swings out of the way, the person drops into the water, and they stand up or grab the ladder and climb back onto the seat. Somebody on the outside flips the seat back up and relatches it, which takes about two seconds once you have done it twice.
Why some targets feel harder than others
Most tanks let you adjust how sensitive the latch is. Set tight, it takes a solid hit square in the middle. Set loose, a glancing shot will trip it.
That adjustment is your best tool on event day. If the line is long and nobody has landed a hit in ten minutes, loosen it. If one twelve year old with an arm is dunking the pastor every single throw and the crowd has stopped laughing, tighten it. A dunk tank that nobody can trip is as dead as one that trips every time.
How much water does a dunk tank hold?
Around 500 gallons. That number catches people out more than anything else on this page, because 500 gallons is both a lot of water and a lot of weight sitting on your grass for the afternoon.
How long does it take to fill a dunk tank?
Roughly 45 to 90 minutes on a normal garden hose. The range is wide because household water pressure varies from one metro Atlanta neighborhood to the next, and an old spigot on a church fellowship hall does not move water like a new one on a house in Rockdale County. The EPA's WaterSense program has useful background on household water use if you are curious how much a hose actually moves per minute.
Two things to plan around. Start filling at least two hours before your event opens, not one. And if you can run two hoses into the tank at the same time, do it, because that roughly halves your wait.
How deep is the water?
Deep enough that a dunked person goes fully under and then stands or climbs straight back out. It is not a swimming pool and nobody is swimming in it.
The exact dimensions depend on the tank, so ask us when you book and we will give you the numbers for the one we are bringing. What matters more for planning is that the water sits high enough to make the dunk feel real, and your volunteers should check the level once or twice over a long afternoon.
What does setup day actually need from you?
Two requirements, and only two.
Flat, firm, level ground. Grass or asphalt are both fine. A slope is not, and soft ground is not either. A full tank weighs a couple of tons, and that weight needs to sit square. Plenty of red clay yards and ball fields around here go soft after a week of rain, so walk the spot before you pick it.
A water spigot within hose reach. This is the one that derails bookings. A lot of metro Atlanta school fields and church lots have no tap anywhere near where you want the tank, and a hose only reaches so far. Check it when you pick the date, not the morning of. If the nearest spigot is a long way off, tell us and we will work around it.
Our crew handles delivery, positioning, setup, and teardown, so your volunteers are not assembling anything. You fill it, you drain it before pickup, and we take care of the rest. That is included across our service zone within 35 miles of Conyers. Full detail lives on the dunk tank rental page.
Who can sit in the seat, and who should be throwing?
The seat is generally for ages 10 and up. Throwers need to be old enough to aim, which in practice means the little ones get walked up close and allowed to lob one at the target from a few feet away while an adult supervises.
Keep one adult assigned to the tank the whole time it is open. Their job is the line, the seat reset, and watching the water. It is not a job you can leave to whoever happens to be standing there.
What should you wear in the seat?
Swimsuit under a t-shirt and shorts. Nothing white. Nothing that soaks up half the tank and gets heavy. Take off glasses unless they are strapped on, leave your phone and keys with somebody, and have a towel and dry clothes waiting.
Tell your volunteer rotation this in advance. Every event has one person who shows up in jeans, sits down, and regrets it for the next three hours.
Running one on an Atlanta event day
Heat is your friend here. A dunk tank is the rare attraction that gets more popular the hotter it gets, which makes it a good anchor for the 2pm stretch when nothing else is pulling a crowd. On genuinely hot days keep an eye on everyone standing in the sun waiting their turn, and the National Weather Service heat safety guidance is worth a read before a long outdoor event in Georgia.
Pick your seat occupant carefully, because that is what sells tickets. The principal, the coach who talks the most trash, the youth pastor. Post who is sitting in it a week out and you will have a line before the tank is full.
Put the tank somewhere people walk past rather than off in a corner, and keep it near the food. A concession machine running beside a dunk tank line is close to the best money a school festival makes all day, and a few carnival game rentals spread nearby give the crowd somewhere to go while they wait.
If you are working out the money side of a school or church event, our fundraising event ideas post covers ticket pricing, promotion, and the rest of the timeline.
Check your date before somebody else does
October and spring Saturdays are our busiest, and they go weeks ahead. If you have a date in mind, get it held before you start telling people the principal is going in.
Tell us your spot, your headcount, and where your nearest spigot is, and we will tell you straight whether it works. Call (404) 480-2645 or check availability through contact.
Frequently asked questions
How does a dunk tank work?
A seat is held up by a latch connected to a metal target beside the tank. When a ball hits the target hard enough, the target swings, the latch releases, and the seat folds away so the person sitting on it drops into the water. Someone resets the seat by hand and the next person climbs back up.
How much water does a dunk tank hold?
Around 500 gallons. On a standard garden hose that is roughly 45 to 90 minutes of filling, so start well before your guests arrive. Two hoses running at once cuts that down a lot.
Do you fill the tank for us?
We deliver, position, and set up the tank, but the filling happens on site from your water supply. We show you exactly what to do before we leave. Make sure there is a working spigot within hose reach of where the tank is going.
How old do you have to be to sit in the seat?
The seat is generally for ages 10 and up, and throwers should be old enough to aim safely. An adult should supervise the whole time it is in use. We go over safe use with you at setup.
What surface does a dunk tank need?
Flat, firm, and level. Grass or asphalt both work. Avoid slopes and soft ground, because a full tank is heavy and needs to sit stable the whole time.
What should you wear in the seat?
A swimsuit under a t-shirt and shorts is the standard answer. Skip anything white, anything that gets heavy when wet, and glasses unless they are strapped on. Bring a towel and a dry change of clothes.