How to Replace a Water Cartridge Filter

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EcoWater filters are very durable in order to guarantee clean water. There are a variety of filter types that are replaced according to the standard manufacturer guidelines. Upon installation of your water treatment equipment, your Carroll Water consultant will provide a replacement schedule based on your water chemistry and usage to ensure your water remains clean and healthy. EcoWater generally recommends that carbon (pre and post) filters are replaced annually, and reverse osmosis filters are replaced every 3-5 years.

Follow the steps below to properly replace your water filter cartridge:

  1. Turn the inlet and outlet valves off
  2. Depress the red button
  3. Loosen the filter, take the filter out and dispose of it
  4.  Check out your o-ring for tears or rips
  5. Put the o-ring and filter back in place and screw it back on (not too tight)
  6. Slowly turn your inlet on
  7. Once fully filled with water, open the inlet, and then the outlet

In this video, Carroll Water senior technician, Joe Fiorani, demonstrates each step, and discusses signs that will indicate you need to replace your filter, and what you should check before hooking the filter back up.


Hi, I’m Joe Fiorani, one of the senior techs here at Carroll Water. In this video, I’m going to explain to you how to replace your cartridge filter.

First, what you want to do is you want to turn the inlet and outlet valves off. Typically when we do installs, we’re going to have two valves – before and after – that way we can isolate the filter by itself.

Pictured: Joe Fiorani showing how to change a water filter. First, close the inlet and outlet valves.

At any given time there is going to be in a well water application between 40 and 60 PSI in this, so by turning these two off, you’re isolating the filter by itself.

At this point, if you were to try to get the filter off, you’re not going to do it. One of the biggest steps, after you turn the two valves off, is you want to depress the red button. Once you depress the red button, you’re going to get a little bit of water and a little bit of air, but that’s going to release all the pressure that is built up in there.

At that point, you’re going to want to go from your right to your left to loosen the filter.

Pictured: Joe Fiorani showing how to change a water filter. Next, loosen and remove the water filter.

Take the filter out and dispose of it.

At that point, I would say go ahead and check out your o-ring – make sure there are no tears in it or rips. We usually suggest lubing the o ring up really well. Sometimes you can use a synthetic lube or a vaseline, something like that.

Pictured: Joe Fiorani showing how to change a water filter. Next, examine the o-ring for problems.

You want to put the o-ring back in place and make sure it is not stretched out in any way. Then put the filter back in there and then you want to screw it back on; righty-tighty, lefty-loosey. It’s important not to overtighten this. I usually tell customers to hand tighten it as tight as you can.

Once you have it good and snug, you want to turn your inlet on. I usually tell customers to crack the valve slowly, that way you don’t jar anything that is in there.

Pictured: Joe Fiorani showing how to change a water filter. Lastly, crack the inlet valve slowly to let water back in.

Once the thing fills up with water all the way, you can open the inlet, then the outlet, and you’ve got water to your house.

One of the common questions I get is “how often do I need to change my filter?” It is really specific about what is coming into your house. I’ve got customers that last 3 months and I’ve got customers that last a year. What I usually say is if you look down at your filter and you’re inspecting it, and you notice a lot of sediment starting to build up in the filter, it is definitely time to change it. The filter is usually going to get pretty dirty at that point and sometimes you will experience pressure loss in your house – at that point, it is definitely time to replace it.

If you have any issues or questions with any of this portion, you can give us a call at Carroll Water and we’ll come out and help.

Joe Fiorani

Joe Fiorani has been with Carroll Water since August of 2012. He has received countless hours of training within Carroll Water and several hundred hours’ worth of classroom training at several Water Quality Association and Maryland Dept of Environment approved classes. He currently acts as the service manager for our Chantilly operations where he manages a small team that comprise of service technicians, installation technicians and pump technicians.

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