✓ In stock This nylon straight union connector joins two 1/8" vacuum lines end-to-end for automotive vacuum system repairs, extensions, and splices. Used across a wide range of Ford and GM applications for HVAC controls, emissions plumbing, and other vacuum circuit repairs. Cross-references Ford OEM 383000-S and GM OEM 14047034. Specifications Type: Straight Union Connector Material: Nylon Hose I.D. (both ends): 1/8" Application: Universal — Automotive Vacuum Systems Vehicle Fitment Ford (Multiple Models) GM (Multiple Models) Universal — Compatible with most domestic and import vehicles using 1/8" vacuum lines Cross-Reference Numbers Ford OEM: 383000-S GM OEM: 14047034 SMS Part#: 12929 What systems commonly use 1/8" vacuum connectors? 1/8" vacuum line is used in smaller-diameter vacuum circuits including HVAC vent door actuators, emissions solenoids, EGR systems, and check valves on many Ford and GM models. It is narrower than the more common 3/16" vacuum hose, so verify the inside diameter of your existing line before ordering. Do I need clamps with these connectors? In most cases, no clamps are required. The barbed ends grip the inside of the vacuum hose to create a secure, low-pressure seal. For higher-demand applications or hose that is cracked or stiff with age, a small hose clamp can be added for additional security. Is there a 3/16" straight connector or a Y-connector available? Yes — South Mountain Supply part 12937 is a straight union connector for 3/16" vacuum lines. Part 12927 is a nylon Y-connector for splitting or joining three 3/16" lines. Select the connector that matches the inside diameter and configuration of your existing vacuum circuit. How do I repair a broken vacuum line with this connector? Cut the damaged section of vacuum line cleanly with a razor or tubing cutter, removing all cracked or deteriorated material. Push each end of the cut hose onto the barbed ends of the connector until the hose seats past the barb ridge. No adhesive is needed. Confirm the repair holds vacuum before returning the vehicle to service. Are these connectors resistant to heat and automotive fluids? Yes. The nylon material is resistant to the temperature ranges and fluid exposure typical of underhood automotive vacuum plumbing, including engine heat, oil vapor, coolant splash, and common cleaning products found in the engine compartment environment.
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