When installing this or for that matter any toilet seat bidet, do you advise adding a bidet filter to the water line?

That really depends on the quality of your water. Adding an inline water filter can certainly help lengthen the lifespan of your bidet. One thing to note is that not all manufacturer’s support the use of inline water filters. If you have any doubt about whether the bidet you’re considering can be paired with a filter and not jeopardize it’s warranty, please just reach out and we would be happy to help answer any questions you have.