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B & K Proline 888-557 10″ Frost Free Sillcock Stem

Bright brass stem with brass screw black rubber washers stainless spring and metal washers.
Bright brass stem with brass screw black rubber washers stainless spring and metal washers.
Bright brass stem with brass screw black rubber washers stainless spring and metal washers.

chat iconWHAT OUR CUSTOMERS SAY…

“Y'all are amazing. I live in Texas and it's faster to order express from Noel's than go to local parts stores. Customers can text Noel's a picture of the part they need and Noel's will find that part or the equivalent and text the link. They have 2-3 day shipping available. The staff answers the phone quickly, politely and they know their stuff! The unit I needed plumbing parts for was built in the 30s. No matter, Noels has me covered. I highly recommend them. Thank you Noel's for your efficient, old school excellence combined with current technology! You have saved me so much time, money, and aggravation! A++++++ ”
-Thalia,
07/03/2026

$27.17

 

The B&K Proline 888-557 is a 14-inch overall length replacement stem assembly designed for 10-inch anti-siphon, frost-free outdoor sillcocks. It is used to restore proper water flow control and prevent water back-siphoning in outdoor spigots, hydrants, or hose bibbs.

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: 21557 Category: Tag:

Stop outdoor faucet leaks and prevent winter freeze-ups with the B&K ProLine 888-557 Replacement Stem Assembly. Designed specifically for 10-inch anti-siphon frost-free sillcocks (compatible with B&K model series 104-511 through 104-619), this OEM replacement part ensures reliable, leak-free water control for your garden hose and outdoor faucet.

 

888-557

 

 

  • This is a replacement stem assembly used to control water flow in the anti-siphon frost-free sillcocks (also known as outdoor hydrants, hose bibbs, or spigots).
  • It is an integral part of the valve body, designed to provide key internal flow control and prevent back siphoning.
  • For 10″ faucet
  • Stem measures 13 1/2″ to 14″

 

UPC: 032888148598

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…

“Fantastic! I walked in with parts to the faucet in my vintage sink and walked out with everything I needed. Chain hardware stores suggested I get a whole new sink and/or would not be able to do it without a plumber. The employee at Noels took a quick look, knew what it was, and had it in stock. I was able to fix my sink in two minutes with their help! ”
-Elizabeth A.
03/14/2021
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