Instruction: Given a question and its related document, determine if the question is answerable by analyzing the information in the document. Output yes if the document addresses the question, or no otherwise.

Input:
Question: when do you change the filters?
Document: Took a little time to install, but now that its in place I don't even have to think about it, except to change the filters periodically.
Older Culligan RO started to become a maintenance nightmare. Replaced with the this and the quick change filters. The install/replacement was very easy. I am satisfied with this purchase.
It would only go in one way, and this was in the opposite direction of what the photo showed. Would not recommend purchasing this unit.OH!! And, after ONE day, the red light came on that it was time to change the filters...
I say there is NO WARRANTY ON IT!! !The system worked great good water and all good thing.... But it quit working look at the t/s chart it says change filters changed filters, check the air in the tank  air ok. I had it for about a year.
Generally COSTCO water filters are less expensive than any other retailer - maybe the managers there like promoting "healthy" products, and take a smaller margin? Anyway, we bought ours through Amazon, and are happy that we did.The unit itself is beautiful - and the packaging is well thought out - it's all very clean. The faucet is very fine, and even has LEDs to tell you when to change filters.
This product proved to be an issue installing but once past that and hundreds of gallons later this has proven to be a great product in the quality of our water. After the first filter change It sold me further on this product since it was so easy to change the filters.We used to buy bottled water but this has saved us the money and is even better since there isn't any need to stockpile the water.
The Watts RO systems are great. I used this system to upgrade a previous 10 year old Watts RO system in order to get the more convenient filter change. The filters are a little more expensive, but there are fewer of them. Overall, I am very happy with it. I was dismayed to find the exact same unit at Costco for $60 less than I paid at Amazon(after I had installed it).
I installed this to replace a high dollar culligan unit that I wasnt happy with. And after it froze up I researched and asked some guys I know in the trade and they recommeded this unit. It was easy to install it is hooked to my ice maker and gives me great water and ice cubes the pressure is twice what my culligan was and the filters will be MUCH easier to change. all in all well worth the money.
Overall this is a fantastic system, it's easy to install, cheap, easy to change filters, doesn't leak, quiet, and produces great tasting water. This is the second Watts system I've owned, the first was an earlier five stage model but with the older screw on filters. This is a huge improvement, the filters are far easier to change. The tap that comes with this one looks good too, it matches our chrome faucet nicely.
I found that this unit took up far less space under the sink then the old unit. I like the faucet-nice style and I had no leaks on start-up; how often does that happen? I'll look forward to an easy filter replacement in the future when it's time to change filters. If you have a ice maker, make sure you purchase the ice maker kit from Watts; this unit does not come with a T connector.
Answer: yes