how to clean a pentair fns plus pool filter


Author: PoolKing - Pool Sand Filter Manufacturers

How to Clean a Pentair FNS Plus Pool Filter

Pool filters are a crucial part of every swimming pool, and it's essential to keep them clean for optimal performance. The Pentair FNS Plus pool filter is a popular choice for pool owners due to its superior filtration capabilities. However, like all filters, it needs regular cleaning to maintain its effectiveness. In this article, we'll go through the steps to clean a Pentair FNS Plus pool filter.

Why is cleaning your pool filter important?

Before we proceed with the cleaning process, let's first understand why it's essential to clean your pool filter regularly. A pool filter's main job is to remove any debris, dirt, and other contaminants that might be present in your pool water. Over time, this debris accumulates in the filter, leading to reduced water flow and pressure. A clogged filter can also put more strain on your pool pump, resulting in higher energy bills and potentially damaging the pump.

Step-by-Step Guide to Clean a Pentair FNS Plus Pool Filter

Now that we know why pool filter cleaning is essential, let's look at the steps to clean a Pentair FNS Plus pool filter.

1. Turn off the pool pump

To start the cleaning process, turn off your pool pump. This is important to prevent any accidents that might occur while you're cleaning the filter.

2. Remove the filter

Next, remove the Pentair FNS Plus pool filter from the filter housing. This is usually done by turning the knob on the filter housing anti-clockwise until it is loose enough to lift out.

3. Rinse the filter elements

After removing the filter, take out the filter elements and use a high-pressure hose to rinse them thoroughly. Start from the top and work your way down, making sure to remove any debris or dirt that might have accumulated on the filter elements.

4. Soak the filter elements

After rinsing the filter elements, it's time to soak them in a cleaning solution. There are many pool filter cleaning solutions available in the market, and you can choose one that's compatible with the Pentair FNS Plus pool filter. Follow the instructions on the cleaning solution carefully and soak the filter elements for the recommended time.

5. Rinse again

After soaking the filter elements, rinse them thoroughly with water once again to remove any remaining cleaning solution.

6. Reassemble the filter

Lastly, reassemble the Pentair FNS Plus pool filter by putting the filter elements back in place, replacing the housing cover, and tightening the knob.


Cleaning your Pentair FNS Plus pool filter is an important task that should be done regularly. By keeping your filter clean, you'll ensure optimal filtration, prevent damage to your pool pump, and reduce energy bills. Remember to follow the steps above carefully and choose the right cleaning solution for your filter to ensure maximum efficiency. If you're not comfortable doing this on your own, it's always best to hire a professional to help you out.


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