Written by: Gene Fitzgerald // Last Updated: May 11, 2023
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Even though whole house water filters are designed to be robust and long-lasting, they are not immune to problems.
You will still occasionally find yourself fixing issues here and there, sometimes directly related to the filter itself, sometimes involving your plumbing system in general.
And this is what this article is all about: Whole house water filter problem troubleshooting. Let’s go!
Key Takeaways
If you run into any problems with your whole house water filter, don’t panic – you’re very likely not alone. Many of these issues have an established resolution process that boils down to following a few steps.
In some cases, however, you may have to consult an expert, especially when there’s a risk of compromising the integrity of your plumbing or the water filter.
If your whole house water filter doesn’t work at all, start with the most obvious potential cause: Lack of power. While the filter itself doesn’t need electricity in most cases, you may be using auxiliary systems that do. For example, if you’re using a pump to provide additional water pressure, it’s possible that it’s been shut off due to a lack of power.
Your filter may also be clogged. Open it up and verify that there’s no debris blocking the water flow at any stage.
Finally, check if there are any signs of damage on the exterior, and if possible, the interior of the filtration system. A damaged whole house water filter is something you usually won’t be able to handle yourself, requiring additional help from a specialist.
Did you recently install your whole house filter or replace its cartridge? It’s possible that you didn’t do a proper job.
For example, you might have to twist the cartridge or push it in until it clicks. It’s very common for new owners of whole house water filters to do that part incorrectly, leaving them with a malfunctioning unit or one that doesn’t work at all.
You might have air trapped along the water supply. This could happen inside the whole house filter itself or at some point before or after it in your plumbing. If you notice any irregularities with your water flow, that’s a likely cause. You might also hear an occasional banging noise when water is running. In this case, you should flush the system thoroughly for a few minutes. This should remove most issues with trapped air.
Leaks can cause various problems, including affecting your water pressure and flow. Check all points of your plumbing – or at least the ones you have access to – to see if you can identify any leaks. If you can’t easily reach certain parts of the plumbing system, try to listen for telltale dripping sounds.
If your filter’s housing is leaking, this is rarely a simple fix and would often require replacing the entire housing to stay on the safe side.
Plugging the leak is usually not an option and could actually void the warranty of your entire filter.
Always consult your manufacturer to ensure that you’re not about to do anything dangerous or void your warranty.
If an O-ring has degraded over time, it could cause a leak from the top of your whole house water filter. In this case, you should shut off your water supply, remove the housing, clean it, and replace any O-rings.
A leaking valve is another annoying problem that can develop over time without you doing anything wrong. Try tightening up the valve’s connections, but don’t expect that fix to last for long if a leak has already occurred once. In the long term, you should look into replacing that valve.
Pressure problems can be difficult to identify and troubleshoot if they only manifest randomly. It’s possible that you’re just dealing with a random drop in pressure due to circumstances outside of your household and beyond your control. Check if there’s any repair work being done in your vicinity, especially if it affects plumbing.
You may also be using a filter that’s not capable of sustaining a strong enough water flow for the needs of your household. In this case, you will often notice pressure problems when you have too many faucets running at the same time. Try turning on all faucets in the house briefly and see if that affects the pressure even further.
If you only installed your whole house water filter recently and the problem started after its setup, you may be using pipes of the wrong size. You may need wider pipes to accommodate the filter’s throughput.
Occasionally, your whole house water filter’s housing may get stuck. If you can’t free it with your hands, try using a wrench. Be gentle at first, because you don’t want to risk damaging any parts with excessive force, especially any plastic pieces.
Try tapping on the filter with a rubber mallet. This will dislodge any mineral buildups that may have developed around the threading.
You can also try releasing the system’s pressure. This won’t always work, but if you’ve tried the above to no avail, it’s worth a try.
Some types of unusual noises are to be expected when running a whole house water filter.
If you have any questions about whole house water filter troubleshooting please don’t hesitate to leave a comment below!
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