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

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

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02/23/2026

$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.

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SKU: 21557 Category: Hydrant Hose Faucet Parts Tag: B & K Products

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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