{"product_id":"air-brake-emergency-relay-valve-4-ports-3-4-npt-reservoir-3-8-delivery","title":"Air Brake Emergency Relay Valve - 4 Ports, 3\/4\" NPT Reservoir, 3\/8\" Delivery","description":"\u003cp data-start=\"0\" data-end=\"135\"\u003e\u003c\/p\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cspan data-start=\"0\" data-end=\"78\"\u003e\u003cfont size=\"5\" style=\"\"\u003e\u003cstrong\u003eWorld American WAKN30400 – Air Brake Emergency Relay Valve (Midland Style)\u003c\/strong\u003e\u003c\/font\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cspan data-start=\"81\" data-end=\"135\"\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cspan data-start=\"81\" data-end=\"135\" style=\"\"\u003e\u003cfont size=\"5\" style=\"\"\u003e\u003cstrong\u003e4 Ports | 3\/4\" NPT Reservoir | 3\/8\" Delivery Ports\u003c\/strong\u003e\u003c\/font\u003e\u003c\/span\u003e\u003c\/div\u003e\u003c\/span\u003e\u003cp\u003e\u003c\/p\u003e\n\u003cp data-start=\"137\" data-end=\"675\"\u003e🔩 \u003cstrong data-start=\"140\" data-end=\"169\"\u003eInterchange Part Numbers:\u003c\/strong\u003e\u003cbr data-start=\"169\" data-end=\"172\"\u003e\n✔ \u003cstrong data-start=\"174\" data-end=\"192\"\u003eWorld American\u003c\/strong\u003e: WAKN30400\u003cbr data-start=\"203\" data-end=\"206\"\u003e\n✔ \u003cstrong data-start=\"208\" data-end=\"218\"\u003eHaldex\u003c\/strong\u003e: KN30400, KN30400RX\u003cbr data-start=\"238\" data-end=\"241\"\u003e\n✔ \u003cstrong data-start=\"243\" data-end=\"254\"\u003eMeritor\u003c\/strong\u003e: R955KN30400, R955KN30400N, R955KN30400X\u003cbr data-start=\"295\" data-end=\"298\"\u003e\n✔ \u003cstrong data-start=\"300\" data-end=\"310\"\u003eEuclid\u003c\/strong\u003e: E-MDKN30400N, E-MDKN30400X\u003cbr data-start=\"338\" data-end=\"341\"\u003e\n✔ \u003cstrong data-start=\"343\" data-end=\"350\"\u003eBWP\u003c\/strong\u003e: M-30400\u003cbr data-start=\"359\" data-end=\"362\"\u003e\n✔ \u003cstrong data-start=\"364\" data-end=\"380\"\u003eDayton Parts\u003c\/strong\u003e: AVKN30400\u003cbr data-start=\"391\" data-end=\"394\"\u003e\n✔ \u003cstrong data-start=\"396\" data-end=\"403\"\u003ePAI\u003c\/strong\u003e: 3610, 36100, EM36100, LEV-3610\u003cbr data-start=\"435\" data-end=\"438\"\u003e\n✔ \u003cstrong data-start=\"440\" data-end=\"452\"\u003eNavistar\u003c\/strong\u003e: ZZKN30400\u003cbr data-start=\"463\" data-end=\"466\"\u003e\n✔ \u003cstrong data-start=\"468\" data-end=\"476\"\u003eMack\u003c\/strong\u003e: 5396-KN30400\u003cbr data-start=\"490\" data-end=\"493\"\u003e\n✔ \u003cstrong data-start=\"495\" data-end=\"511\"\u003eFreightliner\u003c\/strong\u003e: HDXKN30400\u003cbr data-start=\"523\" data-end=\"526\"\u003e\n✔ \u003cstrong data-start=\"528\" data-end=\"547\"\u003eS\u0026amp;S Truck Parts\u003c\/strong\u003e: S-9322\u003cbr data-start=\"555\" data-end=\"558\"\u003e\n✔ \u003cstrong data-start=\"560\" data-end=\"572\"\u003eAutomann\u003c\/strong\u003e: 170.KN30400\u003cbr data-start=\"585\" data-end=\"588\"\u003e\n✔ \u003cstrong data-start=\"590\" data-end=\"603\"\u003eGlobetech\u003c\/strong\u003e: GTA30400\u003cbr data-start=\"613\" data-end=\"616\"\u003e\n✔ \u003cstrong data-start=\"618\" data-end=\"636\"\u003ePower Products\u003c\/strong\u003e: 30400P\u003cbr data-start=\"644\" data-end=\"647\"\u003e\n✔ \u003cstrong data-start=\"649\" data-end=\"664\"\u003eFortpro USA\u003c\/strong\u003e: F224701\u003c\/p\u003e\n\u003cp data-start=\"677\" data-end=\"1009\"\u003eUpgrade your vehicle’s brake system with the \u003cstrong data-start=\"722\" data-end=\"772\"\u003eWorld American WAKN30400 Emergency Relay Valve\u003c\/strong\u003e, designed in the \u003cstrong data-start=\"790\" data-end=\"815\"\u003eMidland KN30400 style\u003c\/strong\u003e. This emergency relay valve delivers fast air response to rear brakes in the event of a primary system failure—enhancing safety and braking efficiency in heavy-duty trucks, trailers, and buses.\u003c\/p\u003e\n\u003cp data-start=\"1011\" data-end=\"1178\"\u003e🚛 \u003cstrong data-start=\"1014\" data-end=\"1030\"\u003eApplication:\u003c\/strong\u003e\u003cbr data-start=\"1030\" data-end=\"1033\"\u003e\n✔ Ideal for heavy-duty truck, tractor, and trailer air brake systems\u003cbr data-start=\"1101\" data-end=\"1104\"\u003e\n✔ Provides emergency and service relay functions in dual-circuit systems\u003c\/p\u003e\n\u003cp data-start=\"1180\" data-end=\"1562\"\u003e🔧 \u003cstrong data-start=\"1183\" data-end=\"1200\"\u003eKey Features:\u003c\/strong\u003e\u003cbr data-start=\"1200\" data-end=\"1203\"\u003e\n✅ \u003cstrong data-start=\"1205\" data-end=\"1229\"\u003e4-Port Configuration\u003c\/strong\u003e – Compatible with standard dual-line brake systems\u003cbr data-start=\"1280\" data-end=\"1283\"\u003e\n✅ \u003cstrong data-start=\"1285\" data-end=\"1334\"\u003e3\/4\" NPT Reservoir Port \u0026amp; 3\/8\" Delivery Ports\u003c\/strong\u003e – Universal fit with most air brake setups\u003cbr data-start=\"1377\" data-end=\"1380\"\u003e\n✅ \u003cstrong data-start=\"1382\" data-end=\"1411\"\u003eMidland-Style Replacement\u003c\/strong\u003e – Direct-fit alternative to OE valves like Haldex KN30400\u003cbr data-start=\"1469\" data-end=\"1472\"\u003e\n✅ \u003cstrong data-start=\"1474\" data-end=\"1492\"\u003eQuick Response\u003c\/strong\u003e – Improves brake timing and enhances safety in emergency conditions\u003c\/p\u003e\n\u003cp data-start=\"1564\" data-end=\"1698\"\u003e📅 \u003cstrong data-start=\"1567\" data-end=\"1591\"\u003eCompatibility Check:\u003c\/strong\u003e\u003cbr data-start=\"1591\" data-end=\"1594\"\u003e\nMatch with any of the listed part numbers or consult your vehicle’s brake system specs for confirmation.\u003c\/p\u003e\n\u003cp data-start=\"1700\" data-end=\"1765\"\u003e🚚 \u003cstrong data-start=\"1703\" data-end=\"1765\"\u003eFast Free Shipping | 1-Year Warranty | Hassle-Free Returns\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"1767\" data-end=\"1887\" data-is-last-node=\"\" data-is-only-node=\"\"\u003e📦 \u003cstrong data-start=\"1770\" data-end=\"1887\" data-is-last-node=\"\"\u003eOrder Now to enhance your vehicle’s air brake performance with the reliable WAKN30400 emergency relay valve! 🔧🚚\u003c\/strong\u003e\u003c\/p\u003e","brand":"World American","offers":[{"title":"Default Title","offer_id":45264814637239,"sku":"EB-197572105148","price":54.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0672\/0372\/7543\/files\/57_ce3fe727-d60e-4427-87a4-897645389aea.jpg?v=1757636682","url":"https:\/\/hotcarparts.com\/products\/air-brake-emergency-relay-valve-4-ports-3-4-npt-reservoir-3-8-delivery","provider":"HotCarParts","version":"1.0","type":"link"}