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Proline Series 3/8-in x 3/8-in Compression Adapter Fitting in the Brass Fittings department at Lowes.com
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Supco Low Lead Saddle Tap Valve STV2LL Fits 3-8" to 1 3/8" OD Copper Tubing: Amazon.com: Industrial & Scientific
3/8 in OD Connection Size, Copper, Refrigeration Line Piercing Saddle Valve - 3DXE6|A32906 - Grainger
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CD5538/6 - C&D Valve CD5538/6 - Braze On Self Piercing Copper Saddle Valve for 3/8" OD Tube (6 Pack)
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Dial Manufacturing Evaporative Cooler Saddle Valve, Self-Piercing, 1/4-In. | Killingworth True Value
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