What Size Pipe Is A 7.5 Hp Submersible Pump?

What Size Pipe Is A 7.5 Hp Submersible Pump?

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What Size Pipe Is A 7.5 Hp Submersible Pump?

The pipe size required for a 7.5 hp submersible pump depends on several factors, including the pump’s discharge capacity, the intended flow rate, and the specific application or system requirements.

Generally, the pipe size is determined based on the pump’s maximum flow rate and the desired velocity of the fluid within the pipe.

One must consider the pump’s discharge capacity to select an appropriate pipe size, typically expressed in gallons per minute (GPM) or liters per second (L/s).

The pump manufacturer usually provides this information in the pump’s specifications. For our example, let’s assume a discharge capacity of 500 GPM (31.5 L/s).

The next consideration is the desired fluid velocity within the pipe. This velocity is commonly assumed to equal or exceed the pump’s maximum flow rate.

To determine the pipe size, multiply the pump capacity (31.5 L/s) by its maximum flow rate (500 GPM).

In my example, this equates to 31.5 L/s x 500 GPM = 12,500 L/h (12.5 m3/h). As a general rule of thumb, the pipe diameter should be about three times the pump’s discharge capacity.

Therefore, in my example, the pipe size would be 3 x 12,500 L/h = 3700 L/h (4 m3/h).

What Size Is A Submersible Water Pipe?

A submersible water pipe is a type of plumbing system that has been installed to prevent water loss.

When it comes time for a home or business to be demolished, the submersible piping system is often installed to keep the ground dry and minimize environmental contamination from construction sites.

The size of a submersible water pipe refers to its diameter, which determines the volume of water it can transport and the system’s overall efficiency.

The size can vary depending on the project’s specific requirements, the intended water flow rate, and the local water supply system regulations.

Can A Water Softener Tank Explode?

In residential and agricultural settings, submersible water pipes range from 1-6 inches in diameter.

Smaller diameter pipes, such as 1 inch or 1.5 inches, are commonly used for low-flow applications, such as supplying water to individual households or small irrigation systems.

These pipes are often made of materials like PVC or polyethylene, which are lightweight, durable, and corrosion-resistant.

For larger water supply needs, such as supplying water to commercial or industrial facilities, larger diameter pipes are used. These pipes can range from 6 inches and above, depending on the required flow rate.

They are usually made of steel or high-density polyethylene (HDPE), which offer greater strength and durability to handle higher water pressures.

In this case, you should choose the right pipe size. If the project is still in the development phase and you are still determining which pipe to buy, you can order a sample pack to help determine which pipe size is right for the application.

What Size Pipe Do You Need To Pull A Good Pump?

You should consider several factors to determine the appropriate pipe size for pulling a pump, such as a pump flow rate, suction pipe length, friction losses, and desired fluid velocity.

Pump Flow Rate (GPM)Pipe Size (Inches)
Up to 501/2
200-3001 1/4
300-5001 1/2
800-12002 1/2

Can I Use PVC Pipe For A Submersible Pump?

Yes! Using PVC pipe for a submersible pump depends on the specific application and requirements.

PVC (polyvinyl chloride) pipes are commonly used for various plumbing and irrigation purposes due to their affordability, lightweight nature, and corrosion resistance.

Yet, when it comes to submersible pumps, there are a few factors to consider:

1. Pressure Rating: Submersible pumps are often used for deep well applications, where they need to generate significant pressure to lift water from underground.

PVC pipes typically have lower pressure ratings than steel or high-density polyethylene (HDPE) materials. It’s crucial to ensure that the pressure rating of the PVC pipe is sufficient for the pump’s requirements.

2. Length of the Line: Longer PVC pipe runs are often more prone to water pressure losses, whereas shorter lines are more consistent in delivering water (i.e., less pressure loss).

For submersible pump applications, using as short of a length of PVC as possible is recommended, which can help minimize the impact of any pressure losses.

3. Pump Frame Material: You should choose PVC pipe based on your pump’s application and required performance characteristics.

However, PVC is unsuitable for pump frames containing internal couplings or oil-seal valves due to its sensitivity to moisture.

4. Pipe Insulation: The most common method of inner pipe insulation is a plastic coating, which you or a local plumber can apply.

However, it gets expensive and requires professional attention whenever it needs to be applied. There are also professional insulation kits available for purchase.

Which Pipe Is Best for The Submersible Pump?

Certain pipe fittings, such as a Tee and a coupling, allow fluid flow in two different directions. Other types and sizes of pipe fittings can connect two pipes.

Here is a small table summarizing some of the different kinds of pipe fittings alongside their pros and cons.

Pipe MaterialAdvantagesDisadvantages
PVC-Lightweight -Corrosion resistant -Low cost -Easy to install-Can become brittle over time -Limited temperature resistance.
HDPE-High strength -Corrosion resistant -Durable -Long lifespan-Relatively expensive -Requires specialized equipment for installation.
Stainless Steel-Excellent corrosion resistance -High strength -Long lifespan.-Expensive -Heavy -Requires skilled installation.
Polyethylene-Lightweight -Flexible -Easy to install -Corrosion-resistant.-Limited pressure rating -Can be affected by UV radiation.
Cast Iron-Durable -High-pressure rating -Good for deep well applications.-Heavy -Prone to corrosion -Requires regular maintenance.

Which Type Of Valve Is Used In A Submersible Pump?

Various valves are used in a submersible pump to control the liquid flow. The valve has two regular operating positions: open and close.

In the open position, the valve allows all liquid from the pump input to reach its outlet. In the closed position, it prevents output liquid from reaching its inlet.

The table below shows some valves that you might want to use for your submersible pump

Valve TypeDescription
Check Valve-Allows fluid to flow in one direction -Prevents backflow.
Foot Valve-Allows water to flow into a pump -Prevents water backflow when the pump is not in operation.
Butterfly Valve-Controls the flow of fluid by rotating a disc in the pipe -Used to regulate the flow rate or shut off the water supply in submersible pumps.
Gate Valve-Uses a gate or wedge-shaped disc to control the flow of water -Provides a full unobstructed flow when fully open and shuts off completely when closed.
Ball Valve-Used for ON/OFF control in submersible pumps.
Diaphragm Valve-Uses a flexible diaphragm to control the flow of fluid -Suitable for handling corrosive or abrasive liquids -Often used in submersible pumps for chemical applications.
Globe Valve-Regulates the flow by raising or lowering a disc against the flow path -Provides fine control over the flow rate -Commonly used in submersible pumps for precise adjustments.
Pressure Relief Valve-Designed to open and relieve excess pressure in the pump system when it reaches a predetermined level -Protects the pump from damage caused by excessive pressure.

How To Select A Submersible Water Well Pump

Here’s a step-by-step guide to help you in the selection process:

1. Determine your water Requirements: Calculate the water you’ll need daily, including regular household use and any additional needs such as irrigation or livestock watering. 

2. Determine the Right pump: A pump must have ample capacity to meet your water needs at high and low demand.

For example, if you need 50 gallons a minute (GPM) at a minimum but only occasionally need this flow rate, then your pump must be able to provide a sustained flow of 50 GPM when needed.

What Size Pipe Is A 7.5 Hp Submersible Pump?

If you need 100 GPM for occasional use and only 25 GPM for regular household use, you don’t require the same capacity as in example #1.

3. Select the Right Motor Size: Consider the water source’s pressure, your pump’s output pressure, and your motor’s horsepower requirement to determine a suitable motor size.

Before purchasing a pump with a smaller, lower-horsepower rating than you need, ensure you can step up the horsepower with an electric generator or water turbine.

4. Install your System: You will need a water source (lake, spring, or well), pipe or tubing for transporting water to the pump, a water pressure tank to store the pump’s output pressure, and a control valve.

5. Select your Motor(s): If you have more than one pump on your system and want them to work in parallel or series, select a commutated electric motor (for example., with built-in commutation gears) instead of an unregulated motor.

It will be more efficient to run the pumps in series if the turbine’s shaft diameter is larger than the pump’s discharge size and to run them in parallel if the turbine’s output shaft diameter is smaller.

6. Inspect your System: Before you use your new pump, thoroughly inspect all components for belt tightness, burrs, other defects, and water pressure tank leaks.

Which PVC Pipe Was Used For Borewell?

-Corrosion resistant
-Ideal for borewells
PVC-C-Environment friendly
-Good for borewells
-Easy installation
PVC-M-Easy installation
-Good for borewells
-Corrosion resistant
– Good for Borewells
-Very durable, corrosion resistant
PVC Screen pipe-Flexible
-Good for Borewells
-Easy installation
PVC casing pipe-Good for borewells
-Easy installation
-Corrosion resistant

What Is The Normal Ampere For The Submersible Pump?

The normal ampere for a submersible pump stands at 1HP for 8.13 amps on a 120-volt system and 8.87 amps connected to a 110-volt circuit.

Amperes are defined as an electric current, the number of electrons that cross a given point in a wire per unit of time. It is the quotient of volts and the resistance or impedance of the circuit.

A normal ampere is what’s used to calculate power. A submersible pump uses electricity at 115 volts, so it runs on 1 normal ampere with electrical resistance or impedance measured in ohms and will draw 9 amps at 120 and 11 amps at 110 volts.

For example, if the ampere runs at 20 amps and the resistance boasts 2 ohms, the voltage will drop to 86 volts. The higher the amp, the more it’ll trigger a breaker or fuse to protect the wiring from damage. 

The normal ampere for a submersible pump depends on several factors, like the voltage that’s being used by an electrical power source, the water resistance it draws, and the water pressure that is being exerted by it.

The 1HP-rated pump draws more electrical current when the water is hotter during the summer.

As for the ampere, it also depends on many factors that may be outside of your control, like what’s inside the electrical system powering your pump or the water pressure you are using to supply water to your system.

Most pumps today are adjustable and may be operated at a different ampere.

Can A Submersible Pump Be Completely Underwater?

Yes! Submersible pumps boast underground designs submerged in the fluid they are pumping. They are commonly used for drainage, sewage, well water pumping, and water circulation in ponds and aquariums.

These pumps are hermetically sealed to ensure water does not enter the motor housing. The motor is typically placed in an oil-filled chamber or encapsulated in resin to provide insulation and cooling.

The motor drives the pump impeller and draws fluid through an inlet, discharged through a pipe or hose connected to the pump’s outlet.

The submersible design allows for efficient pumping since the pump is near the fluid source, reducing the friction losses associated with long suction pipes.

Additionally, submersible pumps are often equipped with float switches or level sensors to automatically control the pump operation based on the fluid level.

A submersible pump is combined with an additional pumping system in most applications.

For example, a well may have a submersible pump to draw water from the well and another pump to transport the water from the well to storage containers.

The connection between these two pumps will be completely submerged in the fluid. Additionally, some submersible pumps can be used for dry-running applications by modifying how it is installed in the ground.


Submersible pumps are widely used in various industries and by many people. They provide an easy way to move water and other liquids.

They are ideal for irrigation, draining liquids and wastewater, and moving water in ponds, aquariums, and more.


Hi! I I faced many questions from customers about different products, and there was hardly any help on the internet. After learning all the things about these products as a manager the hard way, I decided to start a blog and help other people.

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