How To Install Pentair Water Filter?

Installing a Pentair water filter is essential in ensuring your home’s water is clean, safe, and free from contaminants. Installing a Pentair water filter is fairly straightforward and can be done with basic tools and just a few steps. It consists of different stages that remove harmful particles. You can install the pentair water filter on a wall easily.

Parts Of 2-Stage Pentair Water Filter

Parts Of 2-Stage Pentair Water Filter
Parts Of 2-Stage Pentair Water Filter
  • Carbon filter
  • Metal hanging bracket
  • Housing wrench
  • Nipple connector
  • Sediment filter

Installing 2 Stage Pentair Water Filter

Mark holes using the bracket: Measure and mark two holes on the wall using a measuring tape. Place the mounting bracket against the wall to mark the holes, ensuring it is level.

Mount the bracket: Start by mounting the filter’s bracket. Use a drill to make two holes in the wall or area where you want to mount your filter. The size of the hole should match the size of your anchor bolts. Then, use an anchor bolt to secure the bracket onto the wall.

Mount the bracket
Mount the bracket

Insert stage 1 sediment filter: Now insert the first stage of the Pentair water filter, which is a sediment filter.

Align the filter center hole with the bottom of the housing: Once the filter has been positioned, it must be aligned with the center hole of the housing. Ensure that the O-ring is seated correctly and that water can flow through the filter properly. To align it, slowly rotate the filter until you feel or hear a clicking sound from inside the housing. This indicates that it has been correctly attached and secured in place.

Apply lubricant to black O-ring: Once you have the new filter in the tank, it’s time to apply lubricant to the black rubber O-ring. It is essential to use a lubricant specifically designed for O-rings (such as silicone lube or petroleum jelly). This will ensure that the ring seals properly and helps prevent any leaking.

Apply lubricant to black O-ring
Apply lubricant to black O-ring

Fasten stage 1 with sediment filter: Take the sediment filter and fasten it to the right side of stage 1. Make sure that you attach it firmly with the provided screws. Otherwise, there is a risk that water will start flowing out from underneath. Once stage 1 has been fully secured, take the end cap and firmly press it into the filter head, so it is correctly sealed.

Repeat the process with the stage 2 carbon filter: After assembling the stage 1 filter, you will need to repeat the process for the stage 2 filter. Taking the second carbon filter and lining up the grooves on either end of it with those of the plastic housing. Push gently until you hear a snap, indicating that they are securely locked together. Then attach both ends of the O-ring to each side of the filter head.

Take your mounting bracket and insert it into one end of the clear canister, so it locks into place. Then screw one end of the plastic housing onto this bracket until it is secure, and then do the same with the opposite end.

Tighten the filter housing: Align the two half-shells of the filter housing, fit the O-ring inside, and tighten the screws. Make sure all connections are secure.

Turn off the main water line: Make sure to turn off the main water line. This will prevent you from getting water into your filter while installing it.

Turn off the main water line
Turn off the main water line
Drain the water from the faucet
Drain the water from the faucet

Drain the water from the faucet: Turn off the water and drain it from your faucet. To do this, find the main shutoff valve for your home’s water supply and close it. Then open all the taps connected to that line until no more water comes out. This will help minimize the amount of mess caused during installation. Once you have drained the system, you can begin to install your filter.

Sand the pipes with plumbers cloth: After choosing a suitable location for the Pentair filter, you need to sand the pipes before installing it. This will help create an even seal between the pipe and the filter head. Use a plumber’s cloth to lightly sand the pipes outside until they are cleaned of dirt or debris. Make sure to clean up any dust produced during this process. Once done, you can proceed with installing your Pentair water filter.

Attach stainless steel connectors with pipes: Connect the stainless steel connectors with the pipes supplied. Make sure you attach the pipe securely to the inlet and outlet of your water filter. If necessary, use a wrench or pliers to fasten them firmly.

Attach water connectors with filter: Connect the two water connectors to the filter inlet and outlet ports. Secure them with a wrench by turning them clockwise until it’s tight.

Turn off the main water supply
Turn off the main water supply

Turn off the main water supply: Before installing the Pentair water filter, shut off the main water supply. To do this, locate the valve and turn it clockwise until it is closed.

Purge air from water lines: It is important to purge the air from your water lines. This can be done by turning on all cold water outlets in the house and letting them run until there is no more sputtering. This will help ensure that the filter is operating optimally. Additionally, you may need to adjust the height and orientation of the water filter to ensure that it is suitable for your system and configured correctly.

Cartridge replacement

Turn off the shutoff valve from the system: Before starting the process, turn off the shutoff valves from both sides of the system.

Turn off the shutoff valve from the system
Turn off the shutoff valve

Rotate the bleeder valve to relieve the pressure: Relieve the pressure before installing a Pentair water filter. This can be done by rotating the bleeder valve counterclockwise. Make sure to rotate it until you hear water flowing inside the pipe, indicating that the pressure has been released.

Using the wrench and turning the housing clockwise to loosen: The filter housing contains the filter cartridge and needs to be attached to the plumbing using a wrench. As with any water filter, it’s essential to follow all directions for installation. To start, use a wrench to loosen the filter housing from the plumbing and turn it clockwise until it separates from the system.

Using the wrench and turning the housing clockwise to loosen
Using the wrench and turning the housing

Remove old O-ring and filter: Once the filter housing is unscrewed and removed, you will need to remove the old O-ring and old filter. To do this, grab the top of the old filter cartridge with one hand and pull it out of the housing.

Remove old O-ring and filter
Remove old O-ring

Install new filter: Install the new filter on the inlet side of your water filter system. Connect the inlet and outlet hose fittings to the filter, ensuring that the arrow on the filter points toward water flow.

Turn on the main water supply: Turn on the water supply and let the water run through the filter for 3-5 minutes to flush out any sediment. Ensure all the air is out of the lines and that water can flow freely. Depending on your home setup, you may need to open a nearby faucet or tap.

Turn on the main water supply
Turn on the main water supply

Check for any leaks: Once the Pentair water filter is installed, it is essential to check for any leaks. Check all connections and hoses for any signs of leakage or dripping. If there are any visible indications of a leak, tighten the connection until the leak stops.

Pentair Whole House Carbon Filter Installation

Test the raw water: Before installing your Pentair Water filter, it is essential to test the raw water entering the system. pH, hardness, chlorine levels, and other contaminants should be tested to determine the filters needed for your particular application.

Check water pressure: Make sure to check the pressure of your water line. The ideal water pressure should be between 20-125 pounds per square inch (PSI). If your water pressure is lower or higher than this range, it may cause damage to the filter and incorrect water filtering.

Locate a site for the unit: Before starting the installation process, you need to determine where to locate the unit. Place it near a water source and ensure ample room for maintenance and access. Ensure the filter system is not installed in an area exposed to freezing temperatures, which could cause damage.

Turn off the water and drain the plumbing: Turn off the water supply and drain the system of all water. This can be done by turning off the main shutoff valve and running a faucet until it runs out of water. Doing this will protect you from any potential flooding during installation.

Bypass the outside faucets
Bypass the outside faucets

Bypass the outside faucets: To properly install a Pentair water filter, you must bypass the outside faucets. This will ensure that your water is filtered through the system and that no backflow occurs. To do this, turn off your home’s main incoming water supply. Then, locate two shutoff valves on either side of each exterior faucet (often labeled “hot” and “cold”). Turn both valves in a clockwise direction until they are fully closed.

Connect the plumbing to the bypass valve
Connect the plumbing to the bypass valve

Connect the plumbing to the bypass valve: Once the bracket is installed, you will need to connect the plumbing to the bypass valve. Connect a hose from the outlet side of your water pump to one side of the bypass valve. Then you need to attach a hose from the other side of the bypass valve to an inlet port on the filter housing. Attach a hose from another outlet port on the filter housing to your pool return jet or skimmer line. This should complete the plumbing connections for your Pentair filter system.

Plumbing ground connection
Plumbing ground connection

Plumbing ground connection: Plumb the ground connection with a 1-1/4″ I.D. PVC pipe from the filter to the ground stake. Turn on the power to the pump, allowing water to flow through the system.

Install the drain line and air gap: Be sure to attach the black drain line securely and route it where appropriate. Connect the air gap between your drainpipe and the sinkhole. Please ensure the rubber washer is in place, then hand-tighten the locknut on top of it. Securely tighten both ends of the air gap tube.


  • Water leaking at the top of the tank: Check the O-ring and make sure it is properly seated. Replace the O-ring if it is not seated correctly or is damaged.
  • The tank lean to one side is not level: Check the housing to ensure it is adequately secured to the mounting bracket. Make sure all four screws are tightened firmly and evenly.
  • Leaks between the cap and bottom of the filter housing: Check for any damage or cracks on the filter housing. If there is any, replace the housing immediately. Also, make sure that the O-ring is seated correctly and not damaged. Replace the O-ring if necessary.
  • Low water flows: Check the flow control valve to ensure it is not clogged with debris. Suppose it is; clean or replace it as needed. Also, check the pressure relief valve to ensure there are no obstructions and that it works correctly. Replace it if necessary.


Can you install your water filtration system?

Can you install your water filtration system
water filtration system

Yes, you can install a Pentair water filtration system on your own. Depending on the type of filter you have purchased, you may need additional tools and materials, such as a drill or Teflon tape.

Do water filters need to be installed vertically?

It depends on the type of water filter. Some types require vertical installation, while others can be installed horizontally or vertically. Generally, Pentair recommends installing its filters vertically with the inlet and outlet connections pointing downward.

Is the Pentrait water filter worth it?

The Pentair water filter is relatively new but has already made a big splash with consumers. It offers high-quality filtration that can remove sediment, chlorine, and other unpleasant tastes from your water.

Is every pure water filter better than Pentair?

The Pentair and Everpure water filters are two popular options for selecting a water filter for your home. Both brands offer different features that may benefit you, so comparing the two is essential to make an informed decision.

Can I install an ice maker water filter myself?

Yes, you can install an ice maker water filter yourself. Before starting the installation process, it is essential to ensure you have all the necessary tools and parts for the job.


Installing a Pentair water filter is a simple process that can bring fresh, clean drinking water to your home. With the right tools and knowledge, you can have your new filter up and running in no time. To ensure the longest life span possible for your filter, it’s essential to perform regular maintenance on the system and follow all directions in the installation manual. Your Pentair water filter can provide your family with years of clean, safe drinking water with proper installation and maintenance.

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