When draining a dunk tank after an event, speed and efficiency are critical, especially with 300–550 gallons of water to manage. Indoor venues without outdoor drainage require specialized tools, while outdoor setups benefit from gravity-based solutions. Here’s a quick guide to the best tools for the job:
- Submersible Utility Pump: Drains 500 gallons in as little as 15 minutes. Works well indoors. Costs $28–$399.
- MTP Ball Valve Drain Kit: Manual, gravity-based option for rigid tanks. Priced at $45.
- 3-Inch Toilet Flush Valve Kit: Budget-friendly gravity solution for portable tanks. Starts at $7.
- Gas-Powered Trash Pump: High-speed drainage for outdoor setups, moving up to 12,660 gallons per hour. Prices range from $319–$1,500.
- 2-Inch PVC Drain Tee Assembly: Durable, low-cost gravity-fed option for outdoor tanks. Costs $3.95–$25.64.
For quick cleanup and minimal downtime, choose the right tool based on your tank type, venue, and budget. Each option has unique advantages for specific scenarios.
Dunk Tank Drainage Tools Comparison: Flow Rates, Prices & Best Uses
1. MTP Ball Valve Drain Kit
The MTP Ball Valve Drain Kit is specifically designed for industrial dunk tanks, particularly those used in automotive leak detection. It’s tailored for MTP-branded models like the 39ED and 55T, featuring a standard 1-1/2 inch drain size and a polymer tank construction for professional use. However, its 3/8‑inch valve opening results in a lower flow rate, which means it takes longer to empty larger tanks compared to high‑volume alternatives.
For event rental operators, compatibility is a critical factor. This kit only works with tanks that have a 1‑1/2 inch bottom drain outlet. If your dunk tank uses a different size – common in carnival‑style units – adapters will be required, adding complexity.
Tank Compatibility
The MTP Ball Valve Drain Kit is most compatible with MTP’s 39‑inch and 55‑inch air-powered dunk tanks. For instance, the 55T model, with its 24‑inch depth, uses this valve effectively. However, it’s not an ideal choice for carnival-style tanks, which often have different specifications. Event rental operators should consider equipment designed to handle the varied demands of carnival-style setups.
Portability
The valve itself is compact, making it easy to carry as a spare part. That said, the full MTP dunker systems it’s built for are industrial-grade units mounted on casters, requiring a stable surface for proper operation.
Price Range
The MTP Ball Valve Drain Kit is part of larger systems, with the MTP 39ED Dunker Kit priced around $1,627.00. The 55T model falls in the range of $1,898.00 to $2,499.00. For those in event rentals, simpler gate valves priced at roughly $45.00 may be a more budget-friendly option.
Next, we’ll take a look at a submersible pump that offers high-volume drainage, better suited for event-style dunk tanks.
2. Submersible Utility Pump
A submersible utility pump is a quick and versatile solution for draining water. These pumps can handle between 1,575 and 3,900 gallons per hour (GPH), depending on their horsepower. For instance, if you’re draining a standard 500-gallon dunk tank, a 2,000 GPH pump can do the job in about 15 minutes, while a smaller 1,100 GPH model might take closer to 30 minutes.
Flow Rate (GPH)
The pump’s horsepower is the key factor in determining how fast it drains water. A 1/3 HP pump generally moves 2,000 to 2,150 GPH, while a 1/2 HP pump can handle up to 3,900 GPH at a 5-foot lift. Keep in mind that as the lift height increases, the flow rate decreases, eventually stopping at the maximum lift height. For easier cleanup, look for models with a low-suction design that can remove water down to just 1/4 inch.
Tank Compatibility
These pumps are compatible with any flat-bottomed dunk tank and work well with various tank designs. Most models come with adapters for standard 3/4-inch garden hoses, so you won’t need specialized plumbing. They’re also capable of handling "dirty" water, which often contains leaves, grass, or other debris – common at outdoor events.
Portability
Submersible utility pumps are compact and easy to transport. Weighing between 8 and 15 pounds and measuring less than 12 inches in height and 7 inches in width, they fit neatly into storage bins. Many models include non-slip handles for better grip, and cords ranging from 10 to 25 feet provide flexibility for outdoor setups.
Safety Tip: Always connect the pump to a GFCI-protected outlet to reduce the risk of electric shock in wet conditions.
Price Range
Prices vary based on horsepower and features. Entry-level 1/8 HP models start at around $28.00 to $50.00, while standard 1/3 HP pumps fall in the $55.00 to $100.00 range. High-performance 1/2 HP models with advanced features like non-clogging designs cost between $200.00 and $399.00. Next, we’ll look at a permanent drainage option with a toilet flush valve kit.
3. 3-Inch Toilet Flush Valve Kit
A 3-inch toilet flush valve kit is a reliable, gravity-powered solution for draining dunk tanks. Unlike electric or fuel-powered pumps, this system uses a wide valve opening to quickly release water. With its 3-inch diameter, it allows for a faster flow compared to the more common 2-inch valves, making it perfect for efficiently emptying tanks.
Tank Compatibility
These kits are designed for dunk tanks with a 3-inch drain opening (approximately 7.5–8.5 cm) and come with an adjustable overflow tube that accommodates tank depths ranging from 7 to 15 inches. For tanks holding chlorinated water, look for kits with seals made from silicone or Chlorazone rubber. These materials are more resistant to warping than standard rubber, ensuring a long-lasting watertight seal.
"The Champion features a wide lift-off valve that dumps more water faster, dramatically increasing the flushing power." – Stephen Foskett, Author
Portability
Weighing just 10 to 11 ounces, these kits are lightweight and won’t add unnecessary bulk to your dunk tank setup. Made from durable plastic, they’re easy to transport and store. However, keep in mind that installation requires access to both sides of the tank’s bottom to properly secure the mounting nut and gasket. This straightforward setup, combined with its portability, makes it a practical drainage option for dunk tanks. Following safety tips for dunk tanks during setup and drainage is also essential for a secure event.
Price Range
The cost of these kits varies depending on their features. Basic repair kits are priced between $16.96 and $18.99, while mid-range options with upgraded gaskets and bolts range from $21.99 to $25.00. For those seeking a complete setup, kits that include fill valves and handles can cost up to $32.95. Compared to specialized dunk tank gate valves, which often cost around $45.00, these kits offer a more budget-friendly option. Popular models like the Korky 5030 have received high praise, earning an average of 4.4 out of 5 stars from 610 Amazon reviews. Users frequently highlight its impressive performance and rapid drainage capabilities.
4. Gas-Powered Trash Pump
When you need speed and power for outdoor tasks, gas-powered trash pumps are a top choice. These pumps are perfect for quickly draining dunk tanks without depending on electrical outlets. Designed to handle outdoor conditions, they offer much higher flow rates compared to electric utility pumps. For instance, a 2-inch gas-powered trash pump can move anywhere from 9,480 to 12,660 gallons per hour (GPH). This makes them an excellent solution for high-volume outdoor setups where efficiency is key.
Flow Rate (GPH)
Flow rate plays a big role in keeping operations smooth and downtime minimal. Take the Multiquip QP2TH, for example – it can pump up to 211 gallons per minute, which equals 12,660 GPH. Similarly, the 2-inch semi-trash pump from Champion Power Equipment handles about 158 gallons per minute (9,480 GPH). These pumps are built to handle solids like leaves, dirt, and debris up to 1 inch in diameter without clogging, making them reliable for outdoor applications.
Tank Compatibility
These pumps are ideal for standard dunk tanks, which typically hold 350 to 500 gallons of water. They’re also great for tasks like pool draining or maintaining water tanks. Many models include self-priming capabilities and offer optional intake and discharge hoses for added convenience. While 2-inch pumps are the go-to choice for dunk tanks, 3-inch models can handle even larger jobs, reaching flow rates of up to 396 gallons per minute when continuously used across multiple tanks.
Portability
Portability is another advantage of these pumps. A 2-inch semi-trash pump usually weighs between 66 and 96 pounds, making it manageable for one or two people to carry. Many models come with wheel kits featuring never-flat tires and foldable handles, making transportation even easier. To protect against wear and tear during transport, most pumps are housed in sturdy steel roll cages. For larger 4-inch pumps, which weigh between 160 and 360 pounds, mechanical assistance or vehicle mounting is often required.
Price Range
Gas-powered trash pumps come in a wide price range, from entry-level models priced around $319.00 to high-performance options that can cost up to $1,500.00. If you only need one occasionally, rental options are also available. Many models are equipped with features like automatic low-oil shutdown systems, which help protect the engine from damage and extend its lifespan.
5. 2-Inch PVC Drain Tee Assembly
If you’re looking for a durable and budget-friendly drainage solution for your dunk tank, a 2-inch PVC drain tee assembly is a solid choice. These assemblies are made from Schedule 40 PVC, which is designed to resist corrosion from chemicals and organic debris often found in outdoor water systems. The 2-inch size is ideal for high-capacity Drain, Waste, and Vent (DWV) systems, making it perfect for gravity-fed tank drainage. Let’s dive into the specifics of flow rates, compatibility, portability, and pricing to help you set up your dunk tank.
Flow Rate (GPH)
Under gravity or low-pressure conditions, a 2-inch PVC assembly can manage a flow rate of about 3,300 gallons per hour (GPH), which equals 55 gallons per minute. The smooth interior walls of the pipe reduce friction, ensuring efficient water movement. If moderate pressure (20–100 PSI) is applied, the flow rates can rise to 7,650 GPH, with maximum peaks reaching up to 12,000 GPH.
Tank Compatibility
These assemblies are specifically designed for dunk tanks that use Schedule 40 PVC plumbing. They comply with ASTM D2665 and D3311 standards, ensuring accurate dimensions and reliable flow performance. If your setup requires connecting a 2-inch branch line to a larger 3-inch or 4-inch main drain, saddle tee kits are available. These kits let you tap into existing pipes without needing to remove sections. Additionally, some models come with a female-threaded branch, which allows for the installation of a cleanout plug – useful for clearing debris like grass or other obstructions.
Portability
One of the advantages of PVC fittings is their lightweight design. A standard cleanout tee weighs just 0.34 pounds, making it easy to handle and ideal for portable dunk tank setups that require frequent assembly and disassembly. The material is also durable enough to withstand outdoor conditions, tolerating temperatures up to 140°F with minimal thermal expansion.
Price Range
When it comes to cost, standard sanitary tees are priced around $3.95, while cleanout tees are approximately $5.83. If you need a saddle tee kit for larger mains, the cost ranges from $14.53 for 3-inch mains to $25.64 for 4-inch mains. To ensure watertight seals and prevent leaks, always use PVC primer and solvent cement that meet ASTM F656 and F493 standards.
6. Corghi TS24 Drain Valve
The Corghi TS24 Drain Valve is a manual gate valve specifically designed for Corghi‘s TS18 and TS24 industrial equipment, often used in tire testing and leak detection systems. Unlike motorized pumps, this valve relies on gravity and water pressure, offering a straightforward and low-maintenance solution for industrial dunk tanks.
Tank Compatibility
As a component of Corghi’s specialized automotive testing systems, the TS24 is built for industrial use – not your typical recreational dunk tanks. Maintenance for these units often involves more than just plumbing, such as knowing how to replace dunk tank windows to maintain visibility and safety. If you’re setting up for a carnival or event, a standard gate-style valve is usually better suited for those portable, recreational setups. This difference also impacts how easily the valve can be moved or installed.
Portability
The TS24 is designed for permanent or semi-permanent installations, making it less ideal for mobile events. Its gate mechanism allows for controlled drainage, but it doesn’t offer the convenience or portability of motorized pumps, which are better suited for quick setups and breakdowns.
Price Range
At $45.00, the TS24 sits in the middle of the price range for drainage solutions. It’s more affordable than advanced motorized systems but a step up from basic drain plugs that cost around $7.00. For tanks holding between 300 and 500 gallons, it provides reliable and controlled drainage, though it may not be the best choice if rapid emptying is a priority.
7. MTP 4-Way Pneumatic Drain Control
Let’s shift gears from water drainage tools to a key component for dunk tank operations – this pneumatic control valve highlights an essential aspect of industrial tire testing.
The MTP 4-Way Pneumatic Cylinder Control Valve Kit (SKU: MTP-3955-2) is designed specifically for managing the pneumatic lift in MTP tire dunk tanks. Unlike water drainage tools, this valve controls the air-powered system responsible for submerging tires during industrial leak detection.
Tank Compatibility
This control valve is built exclusively for MTP tire and tube dunker tanks, specifically the MTP-39ED (39-inch diameter) and MTP-55T (55-inch diameter) models. These tanks are engineered for automotive testing, not for recreational use like carnival dunk tanks. The valve operates the air-powered spider arms that move wheel assemblies up and down, submerging them horizontally to check for leaks. This level of precision makes it unsuitable for standard event-style dunk tanks.
Portability
Weighing just 1 lb, the valve assembly is compact and easy to handle. The kit includes the valve, fittings, a muffler/breather, and tubing. While its lightweight design simplifies installation, it’s clearly intended for professional shop environments rather than portable or event-based setups.
Price Range
Priced at $212.47, this is the highest-priced drainage-related component in this guide. The cost reflects its precise engineering and specialized role in pneumatic systems, designed specifically for industrial tire testing rather than general water drainage tasks.
Quick Comparison Table
Here’s a handy table that breaks down some popular drainage tools, comparing their performance, cost, and compatibility to help you maintain your dunk tank effortlessly.
| Tool | Flow Rate / Capacity | Price Range | Weight | Tank Compatibility | Best For |
|---|---|---|---|---|---|
| MTP Ball Valve Drain Kit | Gravity-dependent (~9 GPM) | $45.00 | N/A | Fiberglass / Rigid Tanks | Manual gravity drainage |
| Submersible Utility Pump | 1,575–3,900 GPH | $28.00–$399.00 | 8–15 lbs | Vinyl & Fiberglass Tanks | Indoor venues without gravity drainage |
| 3-Inch Toilet Flush Valve Kit | High-flow gravity | $7.00 | N/A | Standard Portable Tanks | Cost-effective gravity drainage |
The Submersible Utility Pump is perfect for indoor venues where gravity drainage isn’t available. Just attach a garden hose, and you can direct water to the nearest drain with ease. If you’re hosting an outdoor event with tanks between 180 and 500 gallons, the MTP Ball Valve Drain Kit provides a simple, manual solution for $45. For portable setups, the 3-Inch Toilet Flush Valve Kit is a budget-friendly choice at only $7. These tools ensure your dunk tank stays functional and hassle-free, no matter the setting. Beyond drainage, you should also inspect dunk tank replacement parts like seats and triggers to ensure total safety.
Conclusion
The right drainage tools can make post-event cleanup much easier and less time-consuming. For tanks holding 300 to 500 gallons, having the proper equipment not only saves hours of labor but also helps protect your investment. If you’re working indoors without gravity drainage, submersible pumps are a game-changer, offering efficiency when you need it most. On the other hand, sturdy valve kits are perfect for outdoor setups, allowing water to flow onto grass or asphalt with ease.
Ongoing maintenance is just as critical as the initial draining process. Cleaning your tank at least every six months prevents sediment buildup, bacterial growth, and corrosion, all of which can shorten the life of your equipment. Using a submersible pump to completely empty the tank speeds up this process and ensures a deeper clean. This simple routine not only extends the lifespan of your tank but also ensures smoother operations for future events.
Bouncy Rentals USA provides professional dunk tank rentals with sanitized equipment delivered right to your door. Our team prioritizes proper drainage and maintenance, ensuring every rental is event-ready and efficiently dismantled afterward. Whether you’re hosting a backyard birthday bash or a school fundraiser, we handle the logistics so you can focus on what matters most – creating unforgettable memories.
From affordable tools starting at just $7.00 to powerful pump systems, this guide highlights options for every budget and venue. Before each event, check your valves, keep a reliable submersible pump on hand for indoor setups, and stick to a regular cleaning schedule to ensure your dunk tank stays in top shape for years to come.
FAQs
What is the best drain tool for indoor dunk tanks?
A submersible water pump combined with a garden hose is an effective way to drain indoor dunk tanks. This method lets you quickly move water to an appropriate spot, especially when draining it directly on-site isn’t an option.
How do I match a drain valve size to my tank?
To find the right drain valve size for your dunk tank, start by measuring the diameter of the tank’s drain opening. You can use a ruler or caliper for this. Choose a valve that matches this measurement to ensure it fits securely. Since most dunk tanks use standard-sized drain valves, you can also refer to the manufacturer’s specifications if you’re uncertain. Getting the size right is crucial for proper drainage and a snug fit.
What’s the safest way to drain a dunk tank with a pump?
To safely empty a dunk tank using a pump, start by using a submersible water pump along with your garden hose to direct the water to an approved drainage area. Before you begin, make sure the tank is disconnected from its water source, and either secure or remove the seat for added safety. Connect the pump to the tank’s drain outlet, switch it on, and follow essential safety precautions – like keeping electrical connections dry and ensuring all equipment is rated for outdoor use.
