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

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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

WHAT OUR CUSTOMERS SAY…

“The vacuum breaker on my outdoor spigot failed and Noel's Plumbing was the only placeI could find that had the appropriate mfr. part. I sent a text with photos on Wednesday evening to make sure the part I found was correct. In less than 2 hours later, I had a reply confirming it was the correct part. Placed my order that evening and received the part on Saturday afternoon (about 2.75 days) and my plumbing issue was resolved! I highly recommend - I really appreciated the prompt and pleasant response. ”

-Kimberly S.

04/25/2026

$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, noelsplumbingsupply@fuse.net, or via the text widget on this screen.

SKU: 44399 Category: Hydrant Hose Faucet Parts Tag: B & K Products

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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

Yes, this is the OEM recommended part.

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.

WHAT OUR CUSTOMERS SAY…

“I texted him a picture of the shower part from the 50’s I needed and he was able to identify it immediately. I ordered it and it showed up in two days! Very knowledgeable and friendly! ”

-Jim F.

02/04/2026