We have a Seagull water purification that came with the boat. They claim the filters last about a year and you'll know they need to be changed when the stream from the faucet is diminished. A replacement filter can be had with doing a quick search through google for about half to 1/3 of the cost of a Seagull filter. I have noticed the water coming from the filter does taste good. I do get my dock side water from the hose so who knows?. For those looking at filtered water and want something less costly try the pure system. It's inexpensive and we have always had real good luck. Lived in a home with high amounts of solids,calcium and what not. Loved the system for that house, used it in others with good results. It's much better than the Britta as that doesn't remove much of anything - it's just a charcoal filter. My vote goes for the Pure for cost and we'll see about the Seagull. I can say I like the faucet - makes filling a cup, ice trays and the coffee pot easy and it doesn't take up valuable frig space.