How Often Should You Change RO Filters and Service Your Water Softener?
- 4 days ago
- 2 min read
Most people install a system and then forget about it until something feels off. Water tastes a little different. Pressure drops. Ice starts tasting weird again. That’s usually when people realize it’s been a while since anything was serviced.
Both reverse osmosis systems and water softeners need regular upkeep. It’s not constant, but it does matter if you want them to keep working the way they should.
How Often to Change Reverse Osmosis Filters
A standard reverse osmosis system has a few stages, and each one has its own timeline.
Pre filters, which handle sediment and chlorine, are usually changed every 6 to 12 months. These do most of the early work and protect the rest of the system.
The RO membrane lasts longer, typically around 2 to 3 years. It’s the part that does the heavy lifting when it comes to removing dissolved solids.
If your system has a post filter, that’s usually swapped out once a year to keep the taste clean.
In San Antonio, where water tends to have higher mineral content, those timelines can lean toward the shorter side. The system simply has more to deal with.

Signs Your RO System Needs Attention
You don’t always need to track dates perfectly. Your system will usually give you a few hints.
Water starts to taste off or flat. Flow from the faucet slows down, ice or drinks don’t taste the same as before.
When that happens, it’s usually time to check the filters.
How Often to Service a Water Softener
Water softeners don’t have filters in the same way, but they still need regular attention.
At a basic level, you’ll want to keep salt in the brine tank. That’s what allows the system to regenerate and keep removing minerals from your water.
Beyond that, a full service is typically recommended about once a year. During a service, things like the resin bed, settings, and internal components are checked to make sure everything is running correctly.

Signs Your Water Softener Needs Service
Just like with an RO system, you’ll usually notice when something is off.
Spots start showing up on dishes again. Soap doesn’t lather the same way, water starts to feel harder on your skin.
Those are signs the system may not be regenerating properly or needs maintenance.
Why Staying on Schedule Matters
When filters and systems aren’t maintained, performance slowly drops. RO systems lose their ability to filter properly. Water softeners let more minerals pass through. Appliances start dealing with buildup again.
It’s not something that happens overnight, which is why it’s easy to overlook.
But keeping up with simple maintenance keeps everything running the way it’s supposed to.
The Easy Way to Handle It
You don’t need to overthink it, RO filters get changed once a year (depending on use). The membrane every few years. Water softeners get checked about once a year and kept filled with salt.
If you’re not sure where your system stands, it’s usually a good idea to have someone take a look.
Texas Blue Water Filtration helps homeowners across San Antonio stay on top of filter changes and system service without having to keep track of everything themselves.
If it’s been a while or you’re starting to notice changes in your water, it might be time for a quick check.


