{"product_id":"sierra-18-4218-marine-engine-drain-tap-1-4in-npt-brass-petcock-for-mercruiser-cylinder-blocks-exhaust-manifolds","title":"Sierra 18-4218 Brass Drain Tap, 1\/4 Inch NPT, for MerCruiser Cylinder Blocks and Exhaust Manifolds","description":"\u003cp\u003eThe Sierra 18-4218 Drain Tap is a small brass drain valve used to drain water from MerCruiser cylinder blocks and exhaust manifolds during winterization, maintenance, or repair work. Threaded with a 1\/4 inch NPT connection, it installs directly into the drain port on the engine block or manifold casting, allowing the cooling system to be emptied of raw water quickly and cleanly. The tap is constructed of solid brass for corrosion resistance in a marine environment, and features a polished copper-tone finish with a single lever-style handle for easy on\/off operation without tools.\u003c\/p\u003e\u003cp\u003eThis is a fit-specific replacement part, so it is intended to match the original drain tap location and thread size used on applicable MerCruiser cylinder blocks and exhaust manifolds. Each Sierra replacement part is built to meet or exceed the performance of the original equipment part it replaces, making it a reliable choice for routine winterizing and engine service.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-4218\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Drain Tap\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Brass\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Polished\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Copper\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size:\u003c\/strong\u003e 1\/4 inch NPT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHandle Type:\u003c\/strong\u003e Lever, single handle\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Components:\u003c\/strong\u003e Drain Tap\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.11 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999317650\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eFits MerCruiser cylinder blocks and exhaust manifolds. This is a fit-specific part, so confirm compatibility with your authorized dealer before ordering.\u003c\/p\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat thread size does the Sierra 18-4218 drain tap use?\u003c\/strong\u003e The Sierra 18-4218 Drain Tap has a 1\/4 inch NPT thread, matching the drain port on applicable MerCruiser cylinder blocks and exhaust manifolds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the 18-4218 drain tap made of?\u003c\/strong\u003e It is made of solid brass with a polished, copper-tone finish, which resists corrosion in a marine cooling system environment.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does this drain tap fit?\u003c\/strong\u003e The Sierra 18-4218 fits MerCruiser cylinder blocks and exhaust manifolds. Because it is a fit-specific part, confirm the drain port thread size on your engine before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-4218 drain tap weigh?\u003c\/strong\u003e The Sierra 18-4218 Drain Tap weighs 0.11 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-4218 an OEM-equivalent part?\u003c\/strong\u003e Yes, Sierra states this drain tap meets or exceeds the performance of the original equipment part it replaces on MerCruiser cylinder blocks and exhaust manifolds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow does the drain tap operate?\u003c\/strong\u003e The 18-4218 uses a single lever-style handle, so water can be drained from the cylinder block or exhaust manifold by turning the handle without needing tools.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I order part number 18-4218?\u003c\/strong\u003e The listing includes one Sierra 18-4218 Drain Tap; no additional hardware or gasket is specified as included.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy would I need to replace a drain tap like the 18-4218?\u003c\/strong\u003e A drain tap on a cylinder block or exhaust manifold can corrode, seize, or leak over time, so the brass Sierra 18-4218 is used as a direct replacement to restore reliable draining for winterizing or service.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-4218 genuine Sierra or aftermarket?\u003c\/strong\u003e The 18-4218 is a genuine Sierra part, sold under Sierra's own part number as a replacement drain tap for MerCruiser applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color and finish does the 18-4218 have?\u003c\/strong\u003e It has a polished finish with a copper color, consistent with its solid brass construction.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988171075803,"sku":"SIE-18-4218","price":10.81,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-4218_lg__07167.1558126463.500.750.jpg?v=1785188498","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-4218-marine-engine-drain-tap-1-4in-npt-brass-petcock-for-mercruiser-cylinder-blocks-exhaust-manifolds","provider":"Good Vibes Marina","version":"1.0","type":"link"}