How To Install Ispring Water Filter FM25B?

Installing an iSpring water filter fm25b is a great way to access clean and safe drinking water in your home. The filter is easy to install and maintain and provides a cost-effective way to reduce the number of contaminants in your drinking water.

What Is Ispring Water Filter FM25B?

What Is Ispring Water Filter FM25B
Ispring Water Filter FM25B

iSpring water filter fm25b is a premium quality, 5-micron sediment filter that reduces dirt and rust particles to provide high-purity drinking water. This water filter is designed to give you clean and safe drinking water without requiring expensive installation or complex maintenance. It is compatible with most standard 10-inch Big Blue housings and has a 1-year warranty. The filter is certified to NSF/ANSI Standard 42 for chlorine, bad taste, and odor reduction. With its simple installation process, iSpring water filter fm25b can help you get the clean and pure drinking water you need in no time.

Tools required

Tools required
Tools required for installation
  • Safety glasses
  • Hacksaw
  • Towels
  • Soldering iron or torch
  • Flat head screwdriver
  • Power drill
  • Medium Crescent wrench
  • Teflon tape
  • Monkey wrench

How To Install iSpring Water Filter FM25B?

Turn the water off to your house
Turn the water off

Turn the water off to your house: This is the most crucial step in installing a water filter, and it should always be done first. Ensure you turn off both hot and cold water supplies in your house.

Open all plumbing fixtures: Shut off valves, faucets, toilets, and other water sources. Shut off the main water supply line and release it until the water pressure decreases. Disconnect the incoming cold water line from your existing filter or faucet by unscrewing the couplings.

Place filter near main water supply: Make sure the filter is placed near the main water supply to make installation easier.

 Place shut of a valve
Place shut of a valve

 Place shut of a valve: Place the shut-off valve between the faucet and filter, pointing towards the filter. Tighten the fittings on both sides of the shut-off valve with adjustable wrenches. Make sure they are securely tightened to avoid any leaks.

Mount the filter: Locate the mounting bracket, which should come with your filter installation kit. Mount the bracket on a wall or other stable object close to your sink or faucet.

Ensure that the system is level: The FM25B is designed to be installed on a level, horizontal surface. Place the system onto the mounting bracket or other flat surface and adjust the feet to ensure level before securing the system.

Adjust the pipe length: Once the filter is connected, adjust the pipe length to ensure it is appropriately situated. To do this, loosen the two nuts at the top of the filter and slide them down until they are just above the bottom of the filter. Then, thread both ends of your pipes into each end of the filter, ensuring they fit snugly. Tighten the nuts to secure them in place.

Ensure that the system is level: It is essential to check that the system is level before doing any installation.

Fit a pipe union onto the cut section of the mainline: Start by fitting a pipe union to the cut section of the main line. Make sure it is snug and secure, and use a wrench to tighten the nut onto the threads.

Fit shut-off valve: Fit the shut-off valve. This allows you to turn off the water supply while changing the filter so that no water will leak out during this process.

Screw all nuts: After all four components are connected, it’s time to secure them. You will need four nuts for this step. Take the first nut and insert it into the outlet on top of the filter assembly. Once the nut is in place, screw it clockwise with your hands until you feel resistance from the threading. Repeat this process for the remaining three nuts. Make sure you screw them tightly, ensuring a secure hold between components.

Turn on the water supply: Turn on the water supply to the filter and start the filtration process.
Check for leaks: Once the installation is complete, make sure that you check for any leaks in the filter. To do this, turn on your water supply and check all hoses and connections to ensure they are not leaking. If there are any signs of leakage, disconnect the filter immediately and adjust the connection before turning back on your water and continuing with use.

How To Schedule Filter Cartridge Changing?

Depending on your water quality and the frequency of use, you may need to replace your filter cartridge every six months or up to once a year. To ensure that your iSpring filter is always working at its best performance, it is essential to stick to a schedule for replacing the filter cartridge.

To help remind you when it’s time to change your filter cartridge, you can set a reminder on your digital calendar or smartphone. We recommend setting the reminder every six months to ensure you never miss a replacement date.


Does this filter exist in 10×2.5 size?

Yes, the ispring FM25B water filter is available in a 10×2.5 size. This allows it to fit most standard-size water filtration systems.

Can I add a chlorine injection system to it?

Can I add a chlorine injection system to it
chlorine injection

The iSpring FM25B can be used with a chlorine injection system. However, it is essential to note that this will require additional components and the installation of a separate water line. Be sure to consult a professional before attempting this.

Is it the same as MAZ filter?

No, the iSpring FM25B water filter differs from the MAZ filter. The MAZ filter has a different filtration process and is generally used for large-scale applications. However, both filters can reduce contaminants in your drinking water.

Will it work on the Omni filter unit?

Yes, the iSpring FM25B water filter can be used with an Omni filter unit.

Will it reduce acid from water?

Yes, the iSpring FM25B water filter is designed to reduce acidity in your drinking water. It utilizes sediment and carbon filters to absorb acids and other contaminants.

Is there an up-and-down arrow on the filter?

Yes, the iSpring FM25B water filter has an up and down arrow to indicate which direction the water should flow. Always install the filter according to these directions for optimal performance.

What is the media inside the filter?

The iSpring FM25B water filter utilizes a sediment and carbon block filter media. This combination of filters helps to reduce contaminants such as chlorine, lead, cysts, and other organic chemicals from your drinking water.


Installing the iSpring water filter FM25B is a simple process that can be completed in just a few steps. With the right tools and knowledge, you can have your new system up and running in no time. This system is designed to last for years, so you don’t have to worry about regular filter changes. Taking the time to invest in a quality filtration system can pay off in the long run and help ensure that your family has access to clean, healthy water daily.

Leave a Comment