ProQ Reverse Osmosis Filter 1-Year Replacement Set – Compatible with PROQ-550 Under Sink Water Filtration System, 5-Stage 50 GPD Quick-Change Filters

My dad always easily installs it, I’m a repeat customer. Pending on how many people live in the how depends on how long it lasts, usually 1year to a 1.5 years for my household.

We have used these several times for the drinking water tap in our home. Works great for our CPAP machines. We also refill our dogs’ water bowl with this filtered water. It helps to reduce eye tear staining and discharge. Also, we send this water through our fridge (which also has a water filter in it) and between both of them, many guests to our home have commented on how good our water tastes!

Great product and a fair price !

The company I originally purchased my Pro-Q 550 reverse osmosis filter system no longer carries the brand, so they've stopped selling replacement filter kits, too. I was very happy to see this replacement kit available at such a good price. The twist on/twist off method used with these filters made the replacement a snap, and before I knew it, the system was back to providing a ready supply of good, clean water. The quality of the filters is identical to the original equipment manufacturer's filters.

Easy to install and taste water - make sure to use white water tape to avoid water leaks

I’ve bought these twice before and changed them myself. This time, as soon as I turned the system back on, it no longer worked. Not thinking that it might have been the filters, I tried every video fix I could find, but water would not flow through the filters. I even bought a new RO tank, thinking maybe the bladder was not working. I understand the importance of placing the filters not only in the right order, but the right position to ensure that it works perfectly. Therefore, before my first filter change, I took pictures of the proper order. I even Tried reinstalling the main filter backwards, but still no water would come through.With so many removals, I ended up weakening the copper pipe that is attached to the system-it’s in a very tight space and awkward to get to-causing a leak.I had to resort to calling in a plumber and after $500,I learned it was the filters —two of the filters were not allowing any water to drain through them.Because I bought them 5 months before I needed them, I could not return the filters.

If you have a system installed by liquid solutions, these are the filters & membrane you need.Liquid solutions charges 199.99 to replace the filters once a year and 250.00 to replace the membrane once every two years. These are the EXACT same filters! All you do is swap these out with the old ones.Make sure you have a towel and bucket or something to put the old ones in. Installation is easy.Make sure you look online to see how to release the hose on one (the one with the blue label) of these and you’ll need a wrench to replace the smallest one. Other than that, you’re good to go.

Did need to use a type of can top opener (similar to the old car oil filter tighteners ) to undo the old canisters, and then to tighten them in place. We use this system To help decrease the arsenic levels from our well water.