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Author:
george 7941 (Canada)
The hexagonal broach in the seat indicates it is replaceable but feeling around with a pointy knife, I could not detect the transition between the seat and the valve body. Moving radially outwards from the hex on the flat surface with the knife tip, I could not feel any discontinuity.
Just replacing the cartridges (910-900) stopped the dripping, so I did not try to remove the seat.
Just curious, does the seat come out?
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Author:
Curly (CA)
If has been a while since I have worked on one of these....The way I remember it was that the faucet started out in life as using a seat with compression style stem. Then faucet was still tapped for a seat but they switched to the stem you used without a seat. The faucet was convertible back to compression style stem if you threaded a seat back into the body and then used old style compression stem.
Clear as mud ?
I don't remember seeing it with a hex shaped hole. I remember it having threads so you could thread a seat back into it.
Now I'm in California where everything is a little screwy......
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Author:
george 7941 (Canada)
The hex does stand a little proud of its surroundings, so perhaps it is a thin externally threaded bushing that screws in where the seat would screw in. When the present mating surface for the ceramic cartridge corrodes, the bushing could be removed, a seat screwed in and a compression stem could be used. Not that my customer is going to be happy with a compression style faucet after using a quarter turn faucet for the last twenty years.
My customer has a couple of these faucets and I have been replacing the ceramic cartridges about once every five years when they start dripping.
Edited 1 times.
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Author:
george 7941 (Canada)
Another question. You can see white deposits in the second pic, especially on the black rubber gasket at the bottom of the ceramic stem. It feels slimy but not gritty at all. I saw it first on the hot side and figured, ah, from the hot water heater. But I found it on the cold cartridge too. What could it be?
No water softener. I do not find these deposits in faucets in other houses in Toronto nor in my own house. We all have the same common water supply.
Edited 1 times.
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