arrowhead Arrow-Breaker Anti-Siphon Frost Proof 6 in. Sillcock Valve 1/2 in. MIP or 1/2 in. SWT. Quick-Turn Lead-Free Brass is up for auction in Tools & Home Improvement. The current bid is $4.50, 90% below the $45.97 MSRP, in New/Like New condition. This auction has ended — similar items appear in live auctions regularly.