AO Smith 2-stage Water Filter Leaking | Here’s What You Can Do!

The AO Smith 2-stage water filter includes a 2-stage RV water filtration system. It reduces harmful contaminants and improves smell and taste. Sometimes this advanced filtration system is also seen to be leaking.

Regular wear and tear or improper installation could be the main reason for AO Smith 2-stage water filter leaking. These problems can create some dangerous issues also. Fortunately, this water filter leaking can be fixed by replacing some components of the filter.

In this article, I’ll discuss the major causes and their solutions to prevent AO Smith 2-stage water filter leakages. I will also go over the possible dangers caused by water leaking. So, let’s dive into the depths of the article.


Why Is My AO Smith 2-stage Water Filter Leaking? 

There are a variety of reasons that may cause leaks with the AO Smith 2-stage water filter. Some of the most common causes of this problem will include: 

Damaged O-rings

The O-rings are designed to seal the joint between two different parts in an AO Smith 2-stage water filter. So, if the o-rings are not seated accurately and not sufficiently lubricated, they can cause several leakages in the filter.

It also happens when the o-rings are too dirty or clogged with water contaminants. So, replace the o-rings if they’re completely damaged. It will cost between $60-$100. The parts will cost $12-$31, while the labor cost could be around $50. 

Loose Connections 

As time goes by, the connections inside the AO Smith 2-stage water filter can become loose due to a bump, or wear and tear. So, check the adapters and the nuts and tighten them with a wrench. 

If the adapters do not get properly tightened, they may need to be replaced. A set of new water filter adapters may cost between $21 and $41.

Damaged Water Storage Tank

A faulty water storage tank can cause the AO Smith 2-stage water filter to leak and damage. The storage tank can be cracked or the air bladder can be raptured. Besides, the valves inside the tank may be loose or malfunctioning. 

In this case, replacing the damaged components of the tank or installing a new water tank can solve the problem. In general, it may cost between $200 and $300 to replace a damaged water storage tank.

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Cracked Filter Housing  

Another important cause of AO Smith 2-stage water filter leaks is a cracked filter housing. When the filter housing isn’t installed and manufactured properly, it leads the housing to crack and create heavy leaks. 

It also occurs due to overpressure inside or outside of the filter. In this case, replace the housing to solve the issue. The overall cost of replacing a cracked water filter housing is $150-$335. Labor costs will be between $75 and $90 and the parts will cost $96-$330. 

Clogged Filter Cartridges 

If the filter isn’t replaced on time, the cartridges will become clogged with mineral deposits. So, regularly clean the cartridges and replace the AO Smith 2-stage filter cartridges on time. 

On average, the replacement cost of a filter cartridge will be around $200. The materials will cost between $24 and $117, while the labor cost is around $75. 

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The Dangers of AO Smith 2-stage Water Filter Leaking 

If there is any leakage in the AO Smith 2-stage water filter, it could be very dangerous in various circumstances. First of all, leaks in the water filter will prevent it from functioning properly.

As a result, it won’t be able to purify the water by reducing dangerous water contamination such as mercury, lead, chlorine, pesticides, and more. So, it may cause various types of health issues. 

Leaks in the AO Smith water filter can damage the area and its foundation around the water filter system. Besides, the damaged filter can also be a breeding ground for harmful bacteria, mold, and chemicals. 

So, these circumstances will cause potential health issues such as cholera, diarrhea, typhoid, dysentery, and more. The other notable bad effect of AO Smith 2-stage water filter leaks is increased utility bills as the leaks will lead the filter to waste and use more water than necessary.

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How to Prevent AO Smith 2-stage Water Filter Leaking? 

As leakage in an AO Smith 2-stage water filter is quite normal, someone can’t completely eliminate its possibility. But it can be reduced by taking some protective measures. 

First of all, make sure that the water filter is of high quality. Otherwise, it will be clogged very fast and the water flow will be decreased. As a result, it will wear out and create leaks in the system. Besides, the filters should be replaced on time. 

The most important task that must be done to prevent water filter leaks is to clean and lubricate the O-rings regularly. Because the o-rings tend to wear out and clog quickly. So, monitor the o-rings regularly and clean it as required.

Lubrication is also very essential for keeping the O-rings in a good condition. But it will require only silicon-based lubricants to lubricate it. Also make sure that the O-ring is installed properly.

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Fixing an AO Smith 2-stage water filter leak requires a better understanding of its mechanism and other necessary information. So, here are some of the most common questions related to water filter leaks found on the internet:

How long does an AO Smith 2-stage water filter last? 

Typically, an AO Smith 2-stage water filter lasts about 6 months. Because the capacity of an AO Smith 2-stage water is around 500 gallons. That means it should be replaced after the filtration of 500 gallons of water. 

What happens when I don’t replace my water filter? 

When you don’t replace your water filter on time, it will be clogged and the water flow will be decreased. It will also fail to filter the water properly and bacteria, pesticides, or chemicals will build up in the filter. 

What is the required water pressure of an AO Smith 2-stage water filter? 

Typically, the applicable water pressure of an AO Smith 2-stage water filter is between 30 psi and 60 psi. If the water pressure is lower or higher than required, the filter may run. But it will cause internal damage and leaks to the filter. 

What is the flow rate of the AO Smith 2-stage water filter? 

The average flow rate of an AO Smith 2-stage water filter is up to 15 L per hour. But it will also depend on the inlet water pressure of the filter. The lower the inlet pressure will be, the lower will be the flow rate. 

When should I call a professional to fix my AO Smith 2-stage water filter leaks?

If you fail to locate the leaks in your water filter, you should call a professional to fix your AO Smith 2-stage water filter. Or if you are experiencing catastrophic leaks that you can’t fix at all, you may need to take your filter to a professional to fix it. 


AO Smith 2-stage water filter leaks are a common problem that most users have to deal with. But once it is detected, you must resolve it before it becomes a more dangerous issue. Fortunately, an AO water filter is quite easy to work with. 

So, you can locate and fix the leaks very easily or also replace the components of the filter if necessary. But if you feel uncomfortable while doing it, you can take help from a professional plumber. 

However, clean the water filter regularly and don’t let the bacteria build up inside the filter to avoid health risks. Also, close the main water supply while doing any replacement to prevent any mess.

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