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Update 4: Once I followed Michael's suggestion I was able to remove the cartridge. Closest match was a Moen 1224, 131222. Inlet and outlet were very different, and rotation of valve was much greater on the Moen. But length, diameter, oring location were a match. It dropped in pretty sweet. I reassembled the valve and IT'S FIXED. Pretty good for a 15 to 25 year old faucet. I have been trying to post pics of the old cartridge since last night. No luck with Imgur for now. Thanks for the help!!!!!!

BTW - I suspect the heavy chrome trim piece is supposed to threat easily off the valve and black piece that is trapped inside of it. The black piece has the internal treads that actually hold the valve up against the bottom of the sink. The black piece is probably supposed to stay on the valve with the chrome trim is removed. It's all back together now, so I'm not going to worry with it.

Update 3 and request: So, Michael's suggestion worked like a champ. The quality brass/copper assembly unthreaded easily. Then using the long screw pictured below threaded into the cartridge and a pair of pliers I was able to pull the cartridge from the housing. Now to find a cartridge replacement. Still cannot identify manufacturer. I'm soaking the parts in vinegar and baking soda to maybe reveal a brand. Can anyone recognize the manufacturer of this assembly? I will post additional pics as soon as Imgur is back up.

Update 2: I pulled the assembly out of the sink. Should be easier to work on. I will try Michael Karas'suggestion for wrenching it apart with the slots.

ANYONE RECOGNIZE BRAND OF THIS ASSEMBLY? PROS SUGGESTED IT WAS GERMAN OR ITALIAN. I've checked carefully for brand stamp, but it's not there.

[update - see pics below - I reattached the brass extension to the plastic cartridge in the middle of the valve. I then clamped pliers around the neck of the extension just below the splines as a pry point. I used a pry bar to pry up on the pliers, extension and valve, using the sink as the reaction point. I've pried pretty hard. Anybody have any idea if the cartridge is supposed to just pull or pry up out of the valve?]

I have a 15-25 yr old wide spaced bathroom sink faucet. It has a drip. I've removed the faucet handle. Now below the splined stub for the handle on the top of the valve stem is a heavy looking round cover, approximately 2" diameter hiding everything below the splines for the handle. The cover is round and chromed. I've tried prying the cover up and I've try twisting it off. It's not budging. In both case I've used fairly sophisticated methods and quite a bit of force. I've tried a hammering a very thin, almost knife sharp, pry bar/wedge between the cover and the sink. There is a very small gap between the sink and the cover because either the sink is not perfectly flat there, or the cover is threaded on slightly off perpendicular to the sink. Anyway, prying is not working. I tried twisting the cover off. Because the cover is chromed and round, it is very difficult to grip it without damaging the chrome cover. I've tried rags, electrical tape & cut bike inner tube to protect the chrome with curved pliers and a pipe wrench. I've also tried a leather strap wrench but still not enough grip. I've done some damage to the part. It is stuck pretty solid. Do I have to tear the cover up to get it off? Any other ideas? Is there a special tool for tightly gripping slippery chromed round pieces without doing damage? If you wish I can send pictures. I don't currently have a url where I can save them.
---next day I tightened a hose clamp around the chrome cover to protect it from the pipe wrench. A cheap hose clamp stripped before it would tighten enough not to slip. 2nd hose clamp was top quality stainless and tightened up enough not to slip. Then I was able to turn the hose clamp/cover with the pipe wrench and threaded the cover off. The gaps in the hose clamp for the hose clamp screw still dug in to the chrome, doing some damage. Now I have to figure out how to get the plastic guts (cartridge?) out of the body. It doesn't seem to thread out. I'm trying to pull it out now. I'll try to post some pics. Can anyone tell me what brand of faucet this is and any ideas on getting the guts out of the valve? Thanks. Hose Clamp - friction but not protecting Disassembled, mostly Plastic part to remove

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Yeah, Pictures of your situation with this faucet would be very helpful in get on to making sugestions to you. If you did not do so already you should try to use a good camera so the pictures are clear and in focus. (Many cell phone cameras take really sucky close up pictures). Note that it may well be useful to get a picture or two of the part of the faucet connections on the under side of the sink too since it may be necessary for you to remove the faucet entirely. –  Michael Karas Jan 10 '13 at 3:52
    
I'm adding a +1 to your question to help build your rep. At 10 rep you'll be able to directly attach your own pictures. Till then if you posted a link to the pictures someone else could embed your pictures into the question for you. Maybe others will uptick your question on the path to 10. –  Michael Karas Jan 10 '13 at 3:57
    
You can upload photos to imgur.com and give us a link. See the faq for more details. –  BMitch Jan 10 '13 at 4:22
    
@BMitch - info update and pictures added –  user10008 Jan 11 '13 at 17:58
    
@Michael Karas - info update and pictures added –  user10008 Jan 18 '13 at 1:33

1 Answer 1

The next step secret to getting more of this faucet apart are the two slots cut across the cupped part. See the arrows in the following picture.

enter image description here

It looks to me as that the cupped part is threaded down inside the larger diameter part that sticks up from the hole in the sink. There is probably a special tool used to engage these slots to thread the part out. It may be possible to lay a piece of metal bar stock across these slots as a tool. If you do that make sure that it has nice square corners.

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your suggestion makes sense to me. I'll give it a try. Roger on the square corners. –  user10008 Jan 18 '13 at 23:29
    
ANYONE RECOGNIZE BRAND OF THIS ASSEMBLY? PROS SUGGESTED IT WAS GERMAN OR ITALIAN. I've checked carefully for brand stamp, but it's not there. –  user10008 Jan 18 '13 at 23:37
    
Once I followed Michael's suggestion I was able to remove the cartridge. Closest match was a Moen 1224, 131222. Inlet and outlet were very different, and rotation of valve was much greater on the Moen. But length, diameter, oring location were a match. It dropped in pretty sweet. I reassembled the valve and IT'S FIXED. Pretty good for a 15 to 25 year old faucet. I have been trying to post pics of the old cartridge since last night. No luck with Imgur for now. Thanks for the help!!!!!! –  user10008 Jan 19 '13 at 17:47

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