DWSP Premium Microplastic Water Filter, NSF 401/53/42 Certified Under Sink Drinking Water Filtration System, Direct Connect Kitchen/Bathroom Sink, Reduces PFOA, PFOS, Lead, Cysts, Asbestos, Chlorine

Rare NSF 401/53/42 drinking water faucet filter. Vast majority are not NSF 401/53/42 certified. My installation taps into the kitchen sink cold water supply, then filters that water to supply a special drinking water faucet. Both the filter and its dedicated faucet were very easy to install. No leaks at all. On general principles, I added 5-cent each blue locking clips to the push-to-connect fittings. Due to a complex kitchen sink plumbing environment, I connected the filter's blue 3/8" tubing to a braided 3/8" compression supply line, the other 3/8" compression end connecting to the cold water supply valve. For my ease, I also (optionally) inserted a small 3/8" plastic valve. See the uploaded images. Excellent in all respects. Highly recommended if you want a hard-to-find NSF 401/53/42 kitchen sink filter. No leaks at all. No taste. No smell. Clear water. Excellent value.

UPDATE: I had my original filter and I am on my 2nd replacement filter. The 1st 2 I used for about 6-7 months before changing. No issues at all and I will stick with this filter for the foreseeable future. Can be a little tough to get the cartridge out when replacing the cartridge and a little water might spill, but not too big of a dealI was looking for a reasonably priced water filter that was certified for more than just NSF/ANSI 42 (for chlorine). I also needed one that did not require a separate faucet. To be clear, this is NOT NSF certified, it is certified by IAPMO to meet NSF standards. This still seems to be a meaningful/reliable certification, but is cheaper for a company to do it this way instead of paying the NSF a ton of money. This filter is also certified to meet NSF 53 and 401 standards. I checked with the company about the plastic hoses they supply with the filter since plastic can leech chemicals (most filters I see use stainless steel). The company replied within a couple of hours and said that it is polyethylene that is tested by the NSF and tested against EPA requirements and approved for food contact. So I guess that’s good enough for me.The installation wasn’t bad. As others stated, the directions aren’t the best but no real issues for me. Make sure the blue hoses are pressed into the filter housing as much as you can. I initially had problems with it leaking but it stopped once I pushed the hoses in more. I didn't use any Teflon plumbers tape on the connections.This filter is certified for 1651 gallons. This was the most I found for a comparable filter/price. (A lot fewer gallons than most NSF 42 only filters)I haven’t ran any testing on my water so hopefully it’s doing what it says. So far so good though, I’ll update if there are any significant changes.

We purchased this undersink water filter because it reduces PFOS. We installed it over a month ago and was pretty uneventful easy installation. Now just one month later it has flooded our under sink cabinet and is leaking from the cap. There is no reason why it is doing this unless its a defective product. Very unhappy with this purchase.

Installed this filter under our kitchen sink. Water tastes better. The process is easy and taking only 15 minutes. Now we have filtered water for daily kitchen use including washing fruits and vegetables. This filter also works as pre-filter to our existing RO system.

NSF certifications 53 and 401 are granted per pollutant; for example, some filters only get certification 53 for Lead, but not for Arsenic. Most filters claim to have 53 cert but when you look on the NSF website they only have the cert for 1 or 2 pollutant. This filter gets great marks because it has the certifications for all of the important pollutants (you can search Hydrovos on NSF website or IPMO R&T website to prove this) but still has a reasonable price point. In addition, it has the PFAS cert from IPMO R&T which is unheard of at this price point.The install instructions aren't great, but you can figure it out fairly quickly. My advice to the manufacturer would be to make a youtube video with install instructions, but quite frankly this is still the best undersink water filter out there.