Danze bathroom faucet cartridge replacement - sleeve wrench too big

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pakle

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My bathroom faucet handles (Danze) squeak or are hard to turn since Day 1. Now it sounds like a jackhammer or water hammer downstairs when the upstairs handle is being used (exaggerating... but not by much). The last time the handyman tried to replace the factory-installed cartridge, the sleeve wrench Danze sent me kept slipping and he could never remove the cartridge. The Danze sleeve wrench is like 15mm & quite loose but a 9/16 socket fits much more snugly. Two questions:

- Do you know of where I can buy a 9/16 sleeve wrench that is as deep as theirs, which is 4.75" long? Hoping the 9/16 won't slip.
- Can I lubricate the white parts of the new cartridge (circled in picture) with silicone grease? These areas do appear to contact with water, though they seem to already have some substance on them. Not sure if it's okay to get it into the water supply.

The instructions say the handle unscrews off the valve body from above to replace the cartridge, and I saw the handyman do this. I don't have the ability to remove the entire valve body & disconnect water hoses from below so I'm hoping to do the replacement from above. I've included pictures of spare parts including handle screwed on valve, cartridge screwed on the valve, and cartridge & sleeve wrench. Thanks for any guidance!
 

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Geofd

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There is a set of wrench's refered to as (cow bells) you can get them at hd or Lowes but they are flimsy, the flat edges start to round out, try a plumbing supply house or a place that sells tools they come in a set of 6 I think,
Grease is a very good idea on rubber o-rings, threads, and can't hurt on bottom part of the stem
 

Twowaxhack

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Here’s a socket that’s 9/16 x 5” deep. It’s outside diameter is 3/4.

Make sure 3/4 will fit down into your tube before you order it.

 

pakle

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There is a set of wrench's refered to as (cow bells) you can get them at hd or Lowes but they are flimsy, the flat edges start to round out, try a plumbing supply house or a place that sells tools they come in a set of 6 I think,
Grease is a very good idea on rubber o-rings, threads, and can't hurt on bottom part of the stem
I don't think the black o-ring on the cartridge turns because it's getting screwed in (threads next to it). I think the white plastic parts in the picture are turning. Safe to put silicone grease on those white parts even though they appear to have water flow through them?
 

pakle

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Here’s a socket that’s 9/16 x 5” deep. It’s outside diameter is 3/4.

Make sure 3/4 will fit down into your tube before you order it.

The valve width is 13/16 so that should (barely) fit! Looks like it has the holes for the screwdriver to fit through and 5" is definitely long enough. I had searched "sleeve wrench" and didn't see this, so thanks for the link!
 

Geofd

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I don't think the black o-ring on the cartridge turns because it's getting screwed in (threads next to it). I think the white plastic parts in the picture are turning. Safe to put silicone grease on those white parts even though they appear to have water flow through them?
The stuff I use is call slick and slide it's food grade clear grease comes in a white tube I grease all o-rings on water filters backflow preventors and more
 

pakle

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The stuff I use is call slick and slide it's food grade clear grease comes in a white tube I grease all o-rings on water filters backflow preventors and more
So I tried smearing some silicone grease on the white parts of a cartridge and it doesn't help. I then sprayed the insides with WD40 Silicone Spray. That did the trick - they turn easily now. I don't think the WD40 Silicone Spray & silicone grease I had laying around are food-safe so I won't install that cartridge, it was just an experiment.

Do you have a recommendation for a food-safe silicone spray that will work in the cartridge? How about this one CRC 03040 Food Grade Silicone Lubricant:
Or am I overthinking the 'food-safe' factor?

Thanks guys.
 
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