What is the Longest Hose You Can Put on a Pump?

When setting up a fuel or fluid transfer system, one common question is: How long can the hose be on my pump?

The answer depends on the pump, flow rate, hose size, fluid being transferred, and the overall setup. However, for many common industrial pumps rated around 15 to 20 GPM and operating at 115 volts or 12 volts, it is generally recommended not to exceed 25 feet of hose.

Why Does Hose Length Matter?

The longer the hose, the more resistance the pump has to overcome while moving fluid. This resistance can reduce the flow rate and make the pump work harder.

Several factors can affect how much resistance is created, including:

• Hose length
• Hose inside diameter
• Pump flow rate
• Fluid viscosity
• Number of fittings and connections
• Elevation changes
• Bends, kinks, and restrictions in the hose

A longer hose does not necessarily mean the pump will stop working, but it can affect the performance you get from the system.

Why Is 25 Feet a Common Recommendation?

For many industrial transfer pumps in the 15 to 20 GPM range, especially 115-volt and 12-volt models, keeping the hose at 25 feet or less can help maintain reliable flow and pump performance.

As hose length increases, pressure loss can increase as well. This can result in a lower flow rate at the end of the hose than what the pump can produce under ideal conditions.

For applications where you need a longer hose, it is important to check the manufacturer's specifications for the specific pump being used.

Does Hose Size Affect Maximum Length?

Yes. Hose inside diameter can make a significant difference.

A smaller-diameter hose creates more resistance to flow. Using a larger-diameter hose can reduce restriction and may allow a system to maintain better flow over a longer distance.

However, simply switching to a larger hose does not automatically mean any pump can handle an extended hose length. The pump's specifications and the application still need to be considered.

What About Longer Hoses?

If your application requires more than 25 feet of hose, don't assume that any pump will be able to handle it effectively.

Before selecting a longer hose, consider:

1. Pump specifications – Check the manufacturer's recommended hose length and flow requirements.
2. Hose inside diameter – A larger ID may help reduce flow restriction.
3. Required flow rate – Determine how much fluid you need to move per minute.
4. Fluid being transferred – Different fluids can create different levels of resistance.
5. System layout – Consider fittings, bends, elevation, filters, nozzles, and other restrictions.

So, How Long Can Your Pump Hose Be?

For many 15 to 20 GPM, 115-volt or 12-volt industrial pumps, 25 feet is a common recommended maximum hose length. However, the actual maximum depends on the specific pump and application.

If you're unsure what hose length or hose size you need, check the pump manufacturer's specifications before building your system. Choosing the right hose can help your pump deliver the flow and performance you need.

If you still need help deciding what hose to get, give us a call at 1 (800) 333-3331 or contact us. The JME team can help you understand the right hose size for your pump.