Accurately measuring a low side hose is crucial for ensuring its proper fit, functionality, and safety in various applications. As a trusted supplier of Low Side Hose, I understand the significance of providing clear guidance on this process. In this blog post, I'll share comprehensive steps and tips on how to measure a low side hose effectively.
Understanding the Low Side Hose
Before diving into the measurement process, it's essential to have a basic understanding of what a low side hose is and its typical applications. Low side hoses, also known as Low Pressure Oil Hose, are designed to carry fluids at relatively low pressures. They are commonly used in automotive, industrial, and hydraulic systems to transfer oil, coolant, or other fluids from one component to another.
One of our popular products, the Miflex Low Pressure Hose, is known for its flexibility, durability, and resistance to various chemicals and environmental factors. It's suitable for a wide range of low-pressure applications, making it a versatile choice for many customers.
Tools Required for Measuring
To measure a low side hose accurately, you'll need the following tools:
- Tape Measure: A flexible tape measure is ideal for measuring the length and circumference of the hose. Make sure it has clear markings and is long enough to reach the required measurement points.
- Caliper: A caliper is used to measure the inner and outer diameters of the hose. Digital calipers provide more precise measurements, but a traditional Vernier caliper can also be used.
- Marker or Chalk: This is used to mark the measurement points on the hose, making it easier to record the measurements accurately.
Step-by-Step Measurement Process
1. Determine the Hose Length
The first step in measuring a low side hose is to determine its length. This is typically the distance between the two connection points where the hose will be installed.
- Straight Hoses: For straight hoses, simply measure the distance between the two ends of the hose using a tape measure. Make sure to measure along the centerline of the hose for the most accurate result.
- Curved or Angled Hoses: If the hose has a curve or angle, you'll need to measure the length along the centerline of the curve. You can do this by laying the hose flat on a surface and using a flexible tape measure to follow the curve. Alternatively, you can mark the starting and ending points on the hose and then measure the distance between these points using a straight tape measure.
2. Measure the Inner and Outer Diameters
The inner and outer diameters of the hose are important measurements that determine its compatibility with the fittings and the flow capacity of the system.
- Inner Diameter (ID): To measure the inner diameter of the hose, insert the caliper jaws into the hose opening and gently close them until they touch the inner walls of the hose. Make sure the caliper is perpendicular to the axis of the hose for an accurate measurement. Record the measurement in millimeters or inches.
- Outer Diameter (OD): Measuring the outer diameter is similar to measuring the inner diameter, but you'll need to place the caliper jaws around the outside of the hose. Again, make sure the caliper is perpendicular to the axis of the hose and record the measurement.
3. Check the Wall Thickness
The wall thickness of the hose is another important measurement that affects its strength and durability. To calculate the wall thickness, subtract the inner diameter from the outer diameter and divide the result by 2.
Wall Thickness = (OD - ID) / 2
4. Measure the Bend Radius
If the hose needs to be bent during installation, it's important to measure the minimum bend radius. The bend radius is the smallest radius that the hose can be bent without causing damage or restricting the flow of fluid.
- Using a Template: You can use a bend radius template to determine the minimum bend radius of the hose. Place the template against the hose and bend the hose until it matches the curve of the template. The radius of the template is the minimum bend radius of the hose.
- Calculating the Bend Radius: If you don't have a bend radius template, you can calculate the minimum bend radius based on the hose manufacturer's specifications. Most manufacturers provide guidelines on the minimum bend radius for their hoses, which is typically a multiple of the hose's outer diameter.
5. Consider the End Fittings
In addition to measuring the hose itself, you'll also need to consider the end fittings. The type and size of the end fittings will depend on the application and the connection requirements of the system.
- Fitting Size: Measure the outer diameter of the fitting where it will connect to the hose. This measurement is important for ensuring a proper fit between the hose and the fitting.
- Fitting Type: There are various types of end fittings available, including threaded fittings, barbed fittings, and quick-connect fittings. Make sure you choose the right type of fitting for your application and that it is compatible with the hose material.
Tips for Accurate Measurements
- Measure Multiple Times: To ensure accuracy, measure the hose at least twice and compare the results. If there are significant differences between the measurements, measure again to identify and correct any errors.
- Use the Right Tools: Make sure you use high-quality tools that are calibrated correctly. Using inaccurate or worn-out tools can lead to incorrect measurements.
- Take into Account the Hose Material: Different hose materials have different properties, such as flexibility and expansion. When measuring the hose, take into account the material's characteristics to ensure accurate measurements.
- Follow the Manufacturer's Guidelines: Always refer to the hose manufacturer's guidelines for specific measurement instructions and recommendations. The manufacturer's specifications may include additional information on the minimum bend radius, maximum pressure, and temperature limits of the hose.
Conclusion
Measuring a low side hose accurately is essential for ensuring its proper fit, functionality, and safety in various applications. By following the steps and tips outlined in this blog post, you can measure a low side hose with confidence and select the right hose for your needs.
As a leading supplier of Low Side Hose, we are committed to providing high-quality products and excellent customer service. If you have any questions or need further assistance with measuring or selecting a low side hose, please don't hesitate to contact us. We look forward to working with you and helping you find the perfect solution for your application.


References
- Hose Fitting Handbook, Parker Hannifin Corporation
- Hydraulic Hose and Fittings Manual, Eaton Corporation






