By December 4, 2013

Reverse osmosis filter change after 6 months

Long story short:

The water where I live in Minnesota is terrible.

I bought and installed a six-stage reverse osmosis filter instead of buying bottled water or having water delivered to the home.

The filter had a massive improvement on the taste of our water and pretty much changed my life.

Six months later, it was time to change the filter.

Holy shit, the water here is nasty.

Filter status

New filter on the left, old filter on the right.

At first I was going to write about how to change the filter on an iSpring 6-stage reverse osmosis filter, but as I replaced one filter after another I realized that this post was going to be hard to write without mentioning how much shit the filters are removing.

The iSpring water filter I own has three big filters on the bottom and three up top. The first picture in this post is the first filter, which traps sediment.

This is the filter inside of the housing:


Here’s what the water looked like in the chamber:


The second filter is fairly self-enclosed, and so I didn’t post a picture of it.

This is the third filter, with a new filter right next to it:


Obviously needed the filter change. I changed mine at iSpring’s recommended 6-month interval, but I might do the next one at five months to see if there’s a visible difference.

Replacing the filters


The procedure itself was straightforward, with minor pains in my ass.

The hardest part was releasing all of the pressure fittings. Some of them came off easily, some were difficult and took a lot of hand strength.

I recommend having a bucket around to catch the water you’re about to spill all over the place.

  1. Shut off the main valve to the filter under your sink.
  2. Shut off the reserve tank valve.
  3. Disconnect the yellow (in my case) water line from the filter to the reserve tank. Be prepared to catch the water.
  4. Disconnect the black waste water line from the filter to your sink’s drain. Be prepared to catch the water.
  5. Disconnect the blue water line from the filter that feeds the water dispenser on your counter top.
  6. Disconnect the red water line from the water line to the filter.
  7. You should now be able to pull the water filter out from underneath your sink.
  8. It doesn’t matter which of the three under-filters you start with. I started with the stage 3 filter, but it doesn’t matter. Use the factory filter housing tool to unscrew the filter housing.
  9. Discard the old filters. Wash the filter housing with hot water and dish soap.


  10. Replace the stage 4 filter. You have to release two pressure fittings and unscrew the connectors at each end.
  11. Since the other two filters don’t get replaced at six months, I was done. Next time I will replace the stage 5 filter. I am not sure when the membrane filter (stage 6) gets replaced, but I did not get one in my one-year filter kit.

Best thing I’ve purchased in Minnesota

The iSpring six-stage water filter is the best thing I’ve purchased since moving here. And I buy a lot of stuff. I was blown away by how much better the water tasted, but now after replacing the filters I am even more impressed.

A year’s worth of filters was $75 delivered from Amazon Prime. I’m going to replace my filters at the five month mark next time, but even then it’s well worth the price. A replacement filter set is about the cost of a month’s water delivery service here.

Strongly recommended

Posted in: review

1 Comment on "Reverse osmosis filter change after 6 months"

Trackback | Comments RSS Feed

  1. Jenner says:

    I’ve often wondered if those dirty filters were just a breeding ground for bacteria. Do I want to have my water filtered through a bacteria infested membrane? I’m probably missing some important aspect of the system, though I did work in an office that had one and it tasted mighty good.

    I just moved back to my hometown of Tybee Island GA and the water supposedly comes from the Floridian Aquifer, but it tastes more like the bilge water from the ships coming down the river. I’m thinking a whole house system. I want to shower and brush my teeth in clean water. I wonder how much water absorbs in your skin when you shower…. For now, Brita is bridging the gap.