Product fit the faucet, and works great. Actually came with instructions - a rarity these days! Purchased both cold and hot replacements - both were perfect

Review: I recently replaced my cold faucet cartridge with the Pfister 9100320 Cold Faucet Cartridge, and let me tell you, it was like performing open-heart surgery on my sink!Pros:Perfect Fit: This cartridge was an exact match for my faucet, solving the leaky faucet problem like a charm.Easy Installation: With a bit of patience and some YouTube tutorials, I managed to install it without flooding my bathroom. (Note: I highly recommend having a towel handy!)Quality Material: Feels sturdy and well-made, giving me confidence that it won’t give up on me anytime soon.Cons:Instructions Could Be Better: The instructions were a bit vague about reusing parts from the old cartridge, which led to some head-scratching moments.Fishing for Parts: I had to fish out a small black o-ring from the old cartridge that wasn’t mentioned in the instructions. It was like a mini treasure hunt!Time-Consuming: If you’re not a DIY enthusiast, this might take longer than expected. But hey, at least you’ll get a good workout from all the bending and reaching!Verdict: The Pfister 9100320 Cold Faucet Cartridge turned my bathroom into a mini plumbing workshop, but it was worth it. The leak is gone, and I now have a new skill to brag about at parties. If you’re up for a bit of a challenge and want to save some money on a plumber, give this a try. Just remember to keep a towel nearby and maybe a cold beverage to keep you hydrated!

After removing outer white cover it fit perfectly into our 19 year old faucet. Sink works like new again.

I've been purchasing these every three years almost ON THE DOT as they begin leaking right around then. My order history for the hot/cold cartridge replacements literally show July 2018, July 2021, and now Sept 2024. Expect them to fail within this timeframe and you're good!

I normally wouldn't write a review about a faucet cartridge but I felt like there's a few things that I should share with everyone that may make your life a lot easier. So this is the proper part for the proper faucet that we were having trouble with. The problem is ours is the first generation that uses a brass nut, with its own O-ring that is not included in this package, to secure down the cartirdge and the instructions don't actually tell you everything you need to know to set you up for success.The package comes with an additional O-ring which is what I used on the outside of the brass nut to replace the curved O-ring it came with. I assume that the new one would form to the void once under compression so it didn't really bother me that the original one had a curved edge and this one is a strip of rubber.Here are the things to watch out for, I actually got silicone plumbers lube to re-lube most of the gaskets and assemblies. The cartridge does come lubed internally already and it came with a little lube at the colored O-ring. But after messing with it you're going wipe a lot of it off and you may want to apply additional plumbing lubricant at the stem after you disassemble the cartridge. Another thing to watch out for is that one of the reasons they obviously changed the design was the old cartridge will get stuck in the brass nut. In fact it's such a big problem that the instructions mentioned just buying a new brass nut. This was not an option for us so what I recommend you do if you wind up with a decade plus old cartridge that stuck inside your brass nut is find a sturdy hard surface and convert the entire assembly to as stem is facing downwards and whack it on the hard surface to try to push the stem or a bunch of the assembly out the back of the nut. Use a pair of pliers and try to pull the cartridge apart as much as you can from the nut without marking it. What we wound up with is the outer ring of plastic from the cartridge less, its stem, adhered onto the inner surface of the brass nut. You'll want to jam stuff in there but you want make sure not to damage the irreplaceable O-ring at the top of the inside of the nut. What I recommend you do is take a very small pic or toothpick and get the O-ring out of there first from the top of the nut. Once you have it there's a gap between where the end of the cartridge stops and the O-ring begins, there's actually a lip in the nut for this. Get yourself a miniature flat bladed screwdriver and put it where the O-ring used to be and twist gently to try to put pressure to push the plastic assembly out of the inside of the brass nut.I did this along with the combination of getting a nail or old screw and digging into the plastic through the hole in the top of the nut and putting the nut in a vice and trying to gently tap the nail or screw to dig it into the side and to push it out of the bottom. Eventually a combination of doing this along with larger flatbed screwdrivers using a levering method managed to free the old plastic. There was a lot of, what looked like, sediment and hard water stains that were holding this together. I then used 800 grit sandpaper on a dowel and just gently cleaned the inside of the brass nut. Making sure that you understand you need to have the O-ring removed and you need to clean the inside of the brass nut up to the lip of the O-ring area and then you all seem to clean in the O-ring area separately. After doing this we were able to get a nice fit and put this new cartridge in a much older sink.The only other problem we experienced was the older designs use a totally round faucet handle foundation. There's no key or edge to grip on with a channel lock pliers or any sort of plumbing tool. So when we were turning this nut to undo the assembly we would accidentally end up turning the entire handle assembly and gently unscrewing the bottom waterline from the handle assembly.The waterline didn't come off completely for us, we only ended up spinning it about one and a quarter turns before I realize it was happening. But I had to grip the metal handle foundation with my hand while putting the nut in a spark plug socket to fit inside the relief that was given to us in order to get it started. Once it started I could then get it off with a normal pair of pliers. But at the end of the day when we reapplied water it started to drip because the bottom hose connection which had been loosened from the rotation of the handle assembly. So I was able to reach my hand up under the sink and simply retention that fitting because it has a giant plastic wing nut assembly to help you tighten it by hand, thank goodness.If I had to do this again from step one I would say first getting the handle off wasn't a problem if you seen the directions of removing the hidden screw from the top. Then the handle came off very easily. Getting the nut out of the handle assembly required a spark plug socket because you need a very thin walled socket to get into the relief area of the handle. Once you have that you can loosen it but you'll need to keep your hand on the assembly to prevent it from rotating with the nut. Once you've managed to loosen the nut enough you can get it off with a normal pair of pliers and then your fingers.Once you try to get it off it'll probably pull the old cartridge out with it. At that point you're destroying the old cartridge and trying to push the old plastic assembly out of the brass nut. Before you do too much of that you need to use a gentle plastic or wooden pick and get the O-ring out of the brass nut without damaging it as there is no replacement in this kit. Then spend nearly an hour getting old valve pieces out of the brass nut. Then use high grit sandpaper to polish the inside of the brass nut. Then take the new cartridge and invert it and push the white outside sover toward the table while standing it on its stem to separate the white cover from the black body. This includes removing the colored O-ring as it will not work in a brass nut design.Use the additionally included gasket to replace the curved one at the edge of the brass nut. Put the new cartridge into the faucet assembly put the nut in with it hand threaded make sure to lube the stem to cartridge body intersection then push the old O-ring you got out of the brass nut back into the brass nut where there's a special groove for it. Then place the entire brass nut over the stem of the new valve assembly and tightened by hand while keeping the faucet handle assembly from rotating in place. Then use a spark plug socket wrench to tighten it further. There is a point of no return on tightening this thing so I would advise you to simply make it tight but it's OK if you could keep moving it. I would consider it tight if you're a ratchet and you're actually feeling enough resistance where you think you would break plastic that's about where I would stop.So far we've had zero leaks and everyone's happy. I only found what the faucet was by sheer coincidence using Google images to look at the handle design. Otherwise it's not written anywhere on the faucet and you wouldn't know that this is the cartridge that goes to it because this cartridge is meant to be disassembled for the older version of the faucet when the newer version are meant to keep the white plastic cowling on as it comes in the package. So it can be very misleading.

Bought hot and cold side. Easy to install. Working perfect. Saved lots of money

Fixed my dripping faucet.

Perfect replacement for the cheap stuff they still keep making the internal components from. Our original valve lasted about 6 years. If you’re having a hard time turning your faucet on and off, this may be your fix! Took me 30 min total to disconnect everything, turn off water, disconnect lines, remove broken valve and replace with this one. They give you a separate O-ring to use with different set ups. I didn’t need the second O-ring. Works perfect!Also- (for me) if you have hard water and calcium is eating away at your stuff, a good dunk in 25% Muriatic acid will bubble it all away from the internal components of your faucet handle. Of course, be careful, not for the faint of heart. Need outdoors, gloves etc. It can be dangerous if you don’t know what your doing!!

It's the real thing. It works.

Suitable fit for cold side of faucet.Replacement cartridge for Laundry faucet model F-WU2-20

Just installed it. Easy as pie, just follow Utube instructions

Worked perfectly!

You Tube video explained the changes necessary to change model numbers. Worked well

Product fit the faucet, and works great. Actually came with instructions - a rarity these days! Purchased both cold and hot replacements - both were perfect

Review: I recently replaced my cold faucet cartridge with the Pfister 9100320 Cold Faucet Cartridge, and let me tell you, it was like performing open-heart surgery on my sink!Pros:Perfect Fit: This cartridge was an exact match for my faucet, solving the leaky faucet problem like a charm.Easy Installation: With a bit of patience and some YouTube tutorials, I managed to install it without flooding my bathroom. (Note: I highly recommend having a towel handy!)Quality Material: Feels sturdy and well-made, giving me confidence that it won’t give up on me anytime soon.Cons:Instructions Could Be Better: The instructions were a bit vague about reusing parts from the old cartridge, which led to some head-scratching moments.Fishing for Parts: I had to fish out a small black o-ring from the old cartridge that wasn’t mentioned in the instructions. It was like a mini treasure hunt!Time-Consuming: If you’re not a DIY enthusiast, this might take longer than expected. But hey, at least you’ll get a good workout from all the bending and reaching!Verdict: The Pfister 9100320 Cold Faucet Cartridge turned my bathroom into a mini plumbing workshop, but it was worth it. The leak is gone, and I now have a new skill to brag about at parties. If you’re up for a bit of a challenge and want to save some money on a plumber, give this a try. Just remember to keep a towel nearby and maybe a cold beverage to keep you hydrated!

After removing outer white cover it fit perfectly into our 19 year old faucet. Sink works like new again.

I've been purchasing these every three years almost ON THE DOT as they begin leaking right around then. My order history for the hot/cold cartridge replacements literally show July 2018, July 2021, and now Sept 2024. Expect them to fail within this timeframe and you're good!

I normally wouldn't write a review about a faucet cartridge but I felt like there's a few things that I should share with everyone that may make your life a lot easier. So this is the proper part for the proper faucet that we were having trouble with. The problem is ours is the first generation that uses a brass nut, with its own O-ring that is not included in this package, to secure down the cartirdge and the instructions don't actually tell you everything you need to know to set you up for success.The package comes with an additional O-ring which is what I used on the outside of the brass nut to replace the curved O-ring it came with. I assume that the new one would form to the void once under compression so it didn't really bother me that the original one had a curved edge and this one is a strip of rubber.Here are the things to watch out for, I actually got silicone plumbers lube to re-lube most of the gaskets and assemblies. The cartridge does come lubed internally already and it came with a little lube at the colored O-ring. But after messing with it you're going wipe a lot of it off and you may want to apply additional plumbing lubricant at the stem after you disassemble the cartridge. Another thing to watch out for is that one of the reasons they obviously changed the design was the old cartridge will get stuck in the brass nut. In fact it's such a big problem that the instructions mentioned just buying a new brass nut. This was not an option for us so what I recommend you do if you wind up with a decade plus old cartridge that stuck inside your brass nut is find a sturdy hard surface and convert the entire assembly to as stem is facing downwards and whack it on the hard surface to try to push the stem or a bunch of the assembly out the back of the nut. Use a pair of pliers and try to pull the cartridge apart as much as you can from the nut without marking it. What we wound up with is the outer ring of plastic from the cartridge less, its stem, adhered onto the inner surface of the brass nut. You'll want to jam stuff in there but you want make sure not to damage the irreplaceable O-ring at the top of the inside of the nut. What I recommend you do is take a very small pic or toothpick and get the O-ring out of there first from the top of the nut. Once you have it there's a gap between where the end of the cartridge stops and the O-ring begins, there's actually a lip in the nut for this. Get yourself a miniature flat bladed screwdriver and put it where the O-ring used to be and twist gently to try to put pressure to push the plastic assembly out of the inside of the brass nut.I did this along with the combination of getting a nail or old screw and digging into the plastic through the hole in the top of the nut and putting the nut in a vice and trying to gently tap the nail or screw to dig it into the side and to push it out of the bottom. Eventually a combination of doing this along with larger flatbed screwdrivers using a levering method managed to free the old plastic. There was a lot of, what looked like, sediment and hard water stains that were holding this together. I then used 800 grit sandpaper on a dowel and just gently cleaned the inside of the brass nut. Making sure that you understand you need to have the O-ring removed and you need to clean the inside of the brass nut up to the lip of the O-ring area and then you all seem to clean in the O-ring area separately. After doing this we were able to get a nice fit and put this new cartridge in a much older sink.The only other problem we experienced was the older designs use a totally round faucet handle foundation. There's no key or edge to grip on with a channel lock pliers or any sort of plumbing tool. So when we were turning this nut to undo the assembly we would accidentally end up turning the entire handle assembly and gently unscrewing the bottom waterline from the handle assembly.The waterline didn't come off completely for us, we only ended up spinning it about one and a quarter turns before I realize it was happening. But I had to grip the metal handle foundation with my hand while putting the nut in a spark plug socket to fit inside the relief that was given to us in order to get it started. Once it started I could then get it off with a normal pair of pliers. But at the end of the day when we reapplied water it started to drip because the bottom hose connection which had been loosened from the rotation of the handle assembly. So I was able to reach my hand up under the sink and simply retention that fitting because it has a giant plastic wing nut assembly to help you tighten it by hand, thank goodness.If I had to do this again from step one I would say first getting the handle off wasn't a problem if you seen the directions of removing the hidden screw from the top. Then the handle came off very easily. Getting the nut out of the handle assembly required a spark plug socket because you need a very thin walled socket to get into the relief area of the handle. Once you have that you can loosen it but you'll need to keep your hand on the assembly to prevent it from rotating with the nut. Once you've managed to loosen the nut enough you can get it off with a normal pair of pliers and then your fingers.Once you try to get it off it'll probably pull the old cartridge out with it. At that point you're destroying the old cartridge and trying to push the old plastic assembly out of the brass nut. Before you do too much of that you need to use a gentle plastic or wooden pick and get the O-ring out of the brass nut without damaging it as there is no replacement in this kit. Then spend nearly an hour getting old valve pieces out of the brass nut. Then use high grit sandpaper to polish the inside of the brass nut. Then take the new cartridge and invert it and push the white outside sover toward the table while standing it on its stem to separate the white cover from the black body. This includes removing the colored O-ring as it will not work in a brass nut design.Use the additionally included gasket to replace the curved one at the edge of the brass nut. Put the new cartridge into the faucet assembly put the nut in with it hand threaded make sure to lube the stem to cartridge body intersection then push the old O-ring you got out of the brass nut back into the brass nut where there's a special groove for it. Then place the entire brass nut over the stem of the new valve assembly and tightened by hand while keeping the faucet handle assembly from rotating in place. Then use a spark plug socket wrench to tighten it further. There is a point of no return on tightening this thing so I would advise you to simply make it tight but it's OK if you could keep moving it. I would consider it tight if you're a ratchet and you're actually feeling enough resistance where you think you would break plastic that's about where I would stop.So far we've had zero leaks and everyone's happy. I only found what the faucet was by sheer coincidence using Google images to look at the handle design. Otherwise it's not written anywhere on the faucet and you wouldn't know that this is the cartridge that goes to it because this cartridge is meant to be disassembled for the older version of the faucet when the newer version are meant to keep the white plastic cowling on as it comes in the package. So it can be very misleading.

Bought hot and cold side. Easy to install. Working perfect. Saved lots of money

Fixed my dripping faucet.

Perfect replacement for the cheap stuff they still keep making the internal components from. Our original valve lasted about 6 years. If you’re having a hard time turning your faucet on and off, this may be your fix! Took me 30 min total to disconnect everything, turn off water, disconnect lines, remove broken valve and replace with this one. They give you a separate O-ring to use with different set ups. I didn’t need the second O-ring. Works perfect!Also- (for me) if you have hard water and calcium is eating away at your stuff, a good dunk in 25% Muriatic acid will bubble it all away from the internal components of your faucet handle. Of course, be careful, not for the faint of heart. Need outdoors, gloves etc. It can be dangerous if you don’t know what your doing!!

It's the real thing. It works.

Suitable fit for cold side of faucet.Replacement cartridge for Laundry faucet model F-WU2-20

Just installed it. Easy as pie, just follow Utube instructions

Worked perfectly!

You Tube video explained the changes necessary to change model numbers. Worked well