Sailfish—January 5, 2020✓ Verified purchase
These filters were an exact replacement for the ones needing replacement for my Reverse Osmosis system. Installation was relatively simple due to the extra long plastic water tubing allowing me to remove the entire RO unit from under the sink for easy access. Caution should be taken afterward to insure that there is no water leakage before returning the RO unit under the sink. Read more
S. OBRIEN—August 16, 2019✓ Verified purchase
I've used the watts RO system for more than 7 years and have always been happy with it. We now have a total of 3 watts RO units and these replacement filters fit well are easy to use and do the job. Read more
Bon—June 22, 2024✓ Verified purchase
We need yo replace these water filters, been using them for years and the water taste great!! Read more
bill r heath—August 29, 2025✓ Verified purchase
Just right! Read more
G. Y.—November 18, 2025✓ Verified purchase
Filter looks good, but very bad delivery process, the package was torn open and one of the filter end was damaged! it must fall on a hard ground very hard. Read more
CesarB—April 17, 2016✓ Verified purchase
I am not sure if they are 100% percent Premier Watts, but they work. I recently bought a WP-4V from Watts. It worked great for about 2 months. One day I started noticing a strange sediment smell from the water. I would flush the system and by the next morning it would smell, taste the same. I opened up the filters to make an inspection. The factory sediment filter was compressed on one side allowing the water the bypass the sediment filtering. I just replaced the sediment filter from this package. It fixed the problem instantly. By the way Premier Watts sent me a free sediment filter plus a 5th stage carbon filter for free. Now that is customer service. Read more
gardenho—March 10, 2024✓ Verified purchase
Fit perfect, great price Read more
Tom Scott—April 3, 2013✓ Verified purchase
I swapped them out and they work perfectly. This kit was by far the best price I'd seen, even at waterfiltersonline.com and at local appliance parts store. Also, just tip, this was the first time I'd replaced these filters since moving into our house which already had this Wp4V system installed. The canisters were tough to get unscrewed. Even tried using the cheap plastic wrench that Watts sells but no luck. So I used a cheap rubber strap wrench from Harbor Freight which worked with my wife holding onto the unit. Also, better leverage if you unscrew them leaving the unit mounted. Read more
