Why Is My PUR Water Filter So Slow

If your PUR water filter is not filtering at the rate you want it to, there are many potential causes, but the main culprits tend to be sediment buildup, bacteria, installation fault, old filter, and air bubbles.

Here we’ll explore some of the reasons why your PUR water filter may be slow, and we’ll offer some tips on how to fix these problems.

There are nine certain reasons why a PUR water purifier can be slow. Below is a list of all the reasons why a PUR water purifier can be slow and a step-by-step explanation of how to fix each problem.

1- Air Bubbles

The most important reason why PUR filters are slow is because of air bubbles trapped in the filter. This is most common in the PUR filters!

to remove the bubbles we have to follow below steps:

1. The First step is to take the PUR Filter and clean it. Place the filter in the sink with some hot water.

2. Then pour a small amount of water on the PUR Filter to make it float. You can do this as many times as necessary.

3. Take your hand and gently move the PUR Filter while shaking it. You will see that some water will leave the filter.

4. Now that the PUR Filter is clean, you can rinse it with more hot water.

5. Make sure that the water does not reach the bottom part of the filter.

6. Once it’s clean, rinse it again and then put it in the refrigerator for about 24 hours.

Before installing the filter, it’s a good idea to carefully clean the mounting area, to ensure there isn’t any debris that could damage your filtration unit.

This step is extremely important, because if there is debris in the mounting area, the filter may not work properly, which could cause the water to not flow.

2- Filter House Blockage

A replacement water filter can have the tendency to trap debris within the housing. This debris can then be difficult to remove, which may in turn cause problems for your water filters.

This is because debris gets caught in the threads of the housing. Blockages can still happen in any filter type.

However, it’s important to keep the housing as clean as possible before putting the new filter in place. Cleaning out the old filter and wiping down the threads inside the housing is a good start.

To prevent clogs, always clean out the filters thoroughly before and after installation.

If you’re cleaning up the filter after installation, be sure to also clean out the housing.

Also, check for corrosion or other foreign matter before putting it back into service.

3- Old Filter Replacement

Water is essential for life. However, there are several things that could be wrong with the water you are drinking.

The first thing to check is the taste of your water. It should be clear and free of sediment or cloudiness.

If it has a bad taste or smell, or if you notice a gradual decrease in water pressure, it may be time to replace your water filter.

The next step is to check the usage guidelines for your water provider.

If they say you can use more than what is recommended, or if you have exceeded your usage limits, you may want to contact your water provider for a replacement filter.

4- Clogged Filter

Sometimes, you won’t notice if a filter starts to clog until it’s too late – meaning your tap water suddenly tastes horrible!

That’s because many filters are not easy to cleanout. If you don’t notice that your water is turning to sewage, here’s what to do.

To determine whether or not your water is contaminated with harmful sediment, you should first get a glass of water from the tap and leave it on the counter for 30 minutes.

Then, carefully pour the contents of the glass into a clean container and see if any sediment remains at the bottom.

If it does, you may want to change your water filter more frequently to prevent contamination in the future.

PUR filters are great filters but you should never let them run dry. If they do, it can be an indication the filter needs to be cleaned.

5- Mineral Desecration

Many of the minerals in water build up in your water filter over time, particularly calcium, which can build up and damage the membranes that are used to remove impurities from your water.

Fortunately, a water filter can easily be replaced for just $20 or less, and this makes it a great idea to keep a set of filters at home.

The scale or ‘white crystal’ that builds upon the outside of the sink, shower, or any other faucet is the calcium carbonate that is leftover after a water softener has removing calcium and magnesium from the water.

PUR faucet filters and filter pitchers are not designed to remove calcium and magnesium from the water.

The filters are more susceptible to scale damage.

6- Using a Hot Water

It may seem counter-intuitive, but PUR filters only work on cold water.

One of the consequences of running hot water through a filter is that it will damage the filter irreparably and the other is that the filter will be slow.

The filter will be fast because of the damage it has undergone.

Below temperatures are given for PUR faucet filters and pitchers filters

For PUR faucet filters 

Do not use water at temperatures over 100 degrees Fahrenheit (38 degrees Celsius) as it can cause serious damage to your pipes.

For PUR filter pitchers 

When using this product should be used in dry conditions. The product should not be used with water above 82°F (28°C).

7- Installation Fault in Replacing The Filter

Incorrect installation usually happened when we replaced the new filter with a new one.

Typically, water filters do not have to be unscrewed, threaded, or twisted all the way in.

There is a reason why this is done, as it increases the cost of the filter and causes additional problems down the road, so it is best to install them as you would normally do.

This can result in water not passing through the filter, or water leaking around the filter.

For PUR faucet filters

1-Turn off the water supply at the wall and unscrew the faucet.

2-Remove the water inlet valve assembly.

3-Screw in the new valve in its place.

4-Reattach the water supply.

5-Run cold water through the water inlet valve for five minutes.

For the pitcher and dispenser filter

1-Put the new filter in a container of ice water for 15 minutes.

2-Turn the old filter counterclockwise to remove it.

3-Drain the water from the old filter and dry it using clean, dry paper towels.

4-Place the filter in the new container and screw it into the faucet to secure it.

5-Hold the Reset button down for 5 seconds if your pitcher or dispenser has one.


Water purification and filtering are important aspects of the home. You should always have a filter in your home, so it’s very important to change your water filter regularly to keep your home’s water system running properly. PUR filter pitchers are a great way to improve the quality of the water you drink.

PUR PLUS Mineral Core Faucet Mount Water Filter is one of the most recommended water filters and you should definitely buy it in case you are looking for an efficient PUR water filter.

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