Instruction: Output yes if the supporting document can answer the given question. Otherwise, output no.

Input:
Question: what filter does it use
Document: We are happy with this filter and it work great. Our water now is so much better. And the customer support was also great
great replacement for my 30 year old rainsoft unit that i cound not get replacement parts. i installedthe unit in four hours after a visit to home depot.
Installation instructions are tedious and confusing and no user manual, but after fighting through the installation . . . what a difference in the quality of the water! Clothes look cleaner, soap and shampoo work better, hair feels cleaner, shower walls stay cleaner. I am very pleased.
Answer: yes