B & K Proline 888-558 12″ Frost Free Sillcock Stem

chat iconWHAT OUR CUSTOMERS SAY…

“These people were extremely helpful in taking me through replacing a 25 year old hard water frozen cartridge on my Philrich sink faucet. They were able to identify the correct part I needed from a photo I sent (I had it figured out wrong). I was pleasantly surprised they had an obscure part like this, but they also told me how to extract the old one when I couldn’t get it out. They said to unscrew it after I had concluded from YouTube the old cartridge was supposed to just slide out. It threaded out as they said and saved me buying a cartridge extractor and a hernia. The whole experience has been excellent. ”
-Pete L.
03/10/2026

$26.47

 

The Mueller 888-558 is a replacement stem assembly for anti-siphon, frost-free sillcock (outdoor faucet) valves.

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: 21558 Category: Tag:

B & K Products Frost Free Sillcock Stem

 

888-558

 

 

  • This product is a replacement stem assembly used to repair single-control, anti-siphon, and frost-free sillcock valves. It helps fix issues like constant dripping or a faucet that won’t shut off completely.
  • For 12″ faucet
  • Stem measures 15 1/2″ to 16″

 

UPC: 032888148604

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…

“Thank you for exact part. Just received and replaced and worked out great! ”
-Karl D.
09/05/2025