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

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

WHAT OUR CUSTOMERS SAY…

“I have come here as a maintenance technician countless times. NOT ONCE did these guys fail to impress me with their knowledge. They are across town for me and I don’t complain due to their unmatched service. I can bring in a busted chewed up cartridge or part and within 10 seconds the guys are like “ yup we have one right over here” and will bring me the exact match from what I had. Simply top tier. -SNS management ”

-Isaac G.

06/15/2024

$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: Hydrant Hose Faucet Parts Tag: B & K Products

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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

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…

“Just before an event, we had a 9 7/8" round drain cover snap in half. It was an odd size and Noel's was the only place that seemed to have one that would fit. We couldn't leave the hole exposed during the event, and Noel's was kind enough to make sure it was overnighted to us. Their effort was truly appreciated and the cover fit perfectly! I highly recommend them! ”

-Linda C.

03/27/2026