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B & K Proline 888-185 Frost Free Sillcock Stem for 4″ Faucet

Brass stem with white plastic nut with black o-ring and black washer.
B & K Proline 888-185 Frost Free Sillcock Stem for 4" Faucet - Image 2
B & K Proline 888-185 Frost Free Sillcock Stem for 4" Faucet - Image 3
B & K Proline 888-185 Frost Free Sillcock Stem for 4" Faucet - Image 4
B & K Proline 888-185 Frost Free Sillcock Stem for 4" Faucet - Image 5
B & K Proline 888-185 Frost Free Sillcock Stem for 4" Faucet - Image 6

chat iconWHAT OUR CUSTOMERS SAY…

“I sent in photos of a broken cartridge (still installed, couldn’t take it out myself due to water shut-off restrictions in a condo) and even with the limited view they were able to tell me the exact part I needed so I could have it ready for the plumber (meaning I didn’t need to pay for a plumber to come out twice!!) ”
-Alaina W.
06/27/2026

$22.17

 

The B&K Products 888-185 is a replacement stem for a 4-inch anti-siphon, frost-free sillcock (outdoor faucet), designed to replace the internal components of aging or damaged B&K faucets.

We can ship anywhere the US Postal Service ships. For orders being shipped outside the US, please contact us at (888) ASK-NOEL, asknoel@noelsplumbingsupply.com, or via the text widget on this screen.

SKU: 44399 Category: Tag:

Restore your leaky outdoor faucet with this durable brass stem assembly designed for B&K ProLine 4-inch frost-free sillcocks. This replacement part acts as the internal control mechanism (approx. 7″ overall length) for older, non-vacuum breaker models, preventing freezing and ensuring a watertight seal without requiring a full faucet replacement.

 

888-185

 

 

  • Replaces the internal workings of older sillcocks, providing flow control and preventing freezing. 
  • For 4″ faucet
  • Stem measures 7″
  • Part of the ProLine Series Frost Free Sillcocks.

 

Customer submitted image.

 

Common questions about this product

Is this item the original manufacturer's recommended replacement part? chevron-icon

Yes, this is the OEM recommended part.

Is this the correct item for my application? chevron-icon

If you’re not sure text us a picture 1-888-275-6635 or email us a picture at noelsplumbingsupply@fuse.net.

 

We will make sure you have the right part.

 

 

chat iconWHAT OUR CUSTOMERS SAY…

“Outstanding fast delivery on two pieces of an ancient Wolverine bath stem for Kohler - from the early 40s I think. The new one has a different body design, but it screwed directly into the old hot/cold tree and was the exact 6" length. Forty eight hours after installation now, and all remains fine. Also, kudos to the people who set up the website and ordering process. Great work - clear photos and info ! PS: I'm not an employee or family...lol. I retired from electrical wholesaling here outside Chicago and I appreciate a good job. ”
-JM C.
07/31/2026
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