{"product_id":"swimables-mastertemp-max-e-therm-drain-plug-with-oring-sw-41-178","title":"Swimables SW-41-178 MasterTemp Max-E-Therm Sensor","description":"\u003cp data-start=\"0\" data-end=\"11\"\u003e\u003cstrong data-start=\"0\" data-end=\"11\"\u003eKey Fit\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"13\" data-end=\"836\" data-is-last-node=\"\" data-is-only-node=\"\"\u003e\n\u003cli data-start=\"13\" data-end=\"146\"\u003e\n\u003cp data-start=\"15\" data-end=\"146\"\u003e\u003cstrong data-start=\"15\" data-end=\"60\"\u003eHeater Drain Plug with O-Ring (SW-41-178)\u003c\/strong\u003e – Seals the drain port on compatible pool heaters to prevent leaks during operation\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"148\" data-end=\"292\"\u003e\n\u003cp data-start=\"150\" data-end=\"292\"\u003e\u003cstrong data-start=\"150\" data-end=\"199\"\u003eFits MasterTemp® \u0026amp; Max-E-Therm® Style Heaters\u003c\/strong\u003e – Designed for Pentair heater models that use this drain plug style (verify compatibility)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"294\" data-end=\"392\"\u003e\n\u003cp data-start=\"296\" data-end=\"392\"\u003e\u003cstrong data-start=\"296\" data-end=\"324\"\u003eIncludes Matching O-Ring\u003c\/strong\u003e – Comes with the correct O-ring to ensure a tight, leak-free seal\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"394\" data-end=\"504\"\u003e\n\u003cp data-start=\"396\" data-end=\"504\"\u003e\u003cstrong data-start=\"396\" data-end=\"430\"\u003eCritical for Freeze Protection\u003c\/strong\u003e – Commonly removed during winterization to allow heaters to fully drain\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"506\" data-end=\"624\"\u003e\n\u003cp data-start=\"508\" data-end=\"624\"\u003e\u003cstrong data-start=\"508\" data-end=\"545\"\u003ePrevents Water Loss \u0026amp; Air Ingress\u003c\/strong\u003e – A properly sealed plug protects the heat exchanger and internal components\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"626\" data-end=\"735\"\u003e\n\u003cp data-start=\"628\" data-end=\"735\"\u003e\u003cstrong data-start=\"628\" data-end=\"662\"\u003eSimple, Tool-Free Installation\u003c\/strong\u003e – Installs easily by hand for routine service and seasonal maintenance\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"737\" data-end=\"836\" data-is-last-node=\"\"\u003e\n\u003cp data-start=\"739\" data-end=\"836\" data-is-last-node=\"\"\u003e\u003cstrong data-start=\"739\" data-end=\"771\"\u003eReplace When Worn or Leaking\u003c\/strong\u003e – Recommended if cracked, missing, or no longer sealing properly\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"135\" data-end=\"454\"\u003eThe Swimables SW-41-178 Drain Plug with O-Ring is a replacement heater drain plug designed for Pentair MasterTemp and Max-E-Therm style pool heaters. This component is installed at the base of the heater to allow controlled draining of water from the heat exchanger during winterization, service, or equipment shutdown.\u003c\/p\u003e\n\u003cp data-start=\"456\" data-end=\"789\"\u003eDrain plugs are a small but critical component of pool heaters. A missing, cracked, or poorly sealing plug can cause slow leaks, air intrusion, or water damage to surrounding equipment pads. The included O-ring ensures a tight, watertight seal when properly installed, helping protect the heater from leakage during normal operation.\u003c\/p\u003e\n\u003cp data-start=\"791\" data-end=\"938\"\u003eThis Swimables replacement is commonly used during heater service, seasonal winterization, or when replacing a lost or damaged original drain plug.\u003c\/p\u003e\n\u003chr data-start=\"940\" data-end=\"943\"\u003e\n\u003cp data-start=\"945\" data-end=\"975\"\u003e\u003cstrong data-start=\"945\" data-end=\"975\"\u003eWhy the Drain Plug Matters\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"977\" data-end=\"1038\"\u003eProper sealing at the heater base protects the entire system.\u003c\/p\u003e\n\u003cp data-start=\"1040\" data-end=\"1057\"\u003eWhy this matters:\u003c\/p\u003e\n\u003cul data-start=\"1059\" data-end=\"1276\"\u003e\n\u003cli data-start=\"1059\" data-end=\"1107\"\u003e\n\u003cp data-start=\"1061\" data-end=\"1107\"\u003ePrevents water leaks from the heater housing\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1108\" data-end=\"1158\"\u003e\n\u003cp data-start=\"1110\" data-end=\"1158\"\u003eProtects the heat exchanger from air intrusion\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1159\" data-end=\"1204\"\u003e\n\u003cp data-start=\"1161\" data-end=\"1204\"\u003eAllows safe draining during winterization\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1205\" data-end=\"1238\"\u003e\n\u003cp data-start=\"1207\" data-end=\"1238\"\u003eReduces risk of freeze damage\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1239\" data-end=\"1276\"\u003e\n\u003cp data-start=\"1241\" data-end=\"1276\"\u003eMaintains proper heater operation\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1278\" data-end=\"1364\"\u003eA worn or missing drain plug can lead to unnecessary heater damage and costly repairs.\u003c\/p\u003e\n\u003chr data-start=\"1366\" data-end=\"1369\"\u003e\n\u003cp data-start=\"1371\" data-end=\"1426\"\u003e\u003cstrong data-start=\"1371\" data-end=\"1426\"\u003eDesigned for MasterTemp \u0026amp; Max-E-Therm Style Heaters\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"1428\" data-end=\"1652\"\u003eThe Swimables SW-41-178 drain plug is designed to match the form and function of MasterTemp and Max-E-Therm style heater drain ports. The included O-ring provides reliable sealing against heater threads when properly seated.\u003c\/p\u003e\n\u003cp data-start=\"1654\" data-end=\"1859\"\u003eUsing a heater-specific drain plug ensures correct fitment and helps avoid cross-threading or sealing issues that may occur with generic plugs. Always verify heater model compatibility before installation.\u003c\/p\u003e\n\u003chr data-start=\"1861\" data-end=\"1864\"\u003e\n\u003cp data-start=\"1866\" data-end=\"1912\"\u003e\u003cstrong data-start=\"1866\" data-end=\"1912\"\u003eEasy Service and Winterization Replacement\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"1914\" data-end=\"2124\"\u003eInstalling or removing the drain plug is a routine part of heater maintenance and winterization. The plug threads in easily and can be removed when draining the heater for freeze protection or internal service.\u003c\/p\u003e\n\u003cp data-start=\"2126\" data-end=\"2168\"\u003eDuring installation, it is recommended to:\u003c\/p\u003e\n\u003cul data-start=\"2169\" data-end=\"2283\"\u003e\n\u003cli data-start=\"2169\" data-end=\"2199\"\u003e\n\u003cp data-start=\"2171\" data-end=\"2199\"\u003eInspect threads for debris\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2200\" data-end=\"2240\"\u003e\n\u003cp data-start=\"2202\" data-end=\"2240\"\u003eEnsure the O-ring is seated properly\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2241\" data-end=\"2283\"\u003e\n\u003cp data-start=\"2243\" data-end=\"2283\"\u003eHand-tighten to avoid over-compression\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2285\" data-end=\"2396\"\u003eReplacing the drain plug during service is an inexpensive preventive step that helps protect heater components.\u003c\/p\u003e\n\u003chr data-start=\"2398\" data-end=\"2401\"\u003e\n\u003cp data-start=\"2403\" data-end=\"2429\"\u003e\u003cstrong data-start=\"2403\" data-end=\"2429\"\u003eProduct Specifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"TyagGW_tableContainer\"\u003e\n\u003cdiv class=\"group TyagGW_tableWrapper flex w-fit flex-col-reverse\" tabindex=\"-1\"\u003e\n\u003ctable data-start=\"2431\" data-end=\"2770\" class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead data-start=\"2431\" data-end=\"2458\"\u003e\n\u003ctr data-start=\"2431\" data-end=\"2458\"\u003e\n\u003cth data-start=\"2431\" data-end=\"2447\" data-col-size=\"sm\"\u003eSpecification\u003c\/th\u003e\n\u003cth data-start=\"2447\" data-end=\"2458\" data-col-size=\"sm\"\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody data-start=\"2469\" data-end=\"2770\"\u003e\n\u003ctr data-start=\"2469\" data-end=\"2517\"\u003e\n\u003ctd data-start=\"2469\" data-end=\"2484\" data-col-size=\"sm\"\u003eProduct Type\u003c\/td\u003e\n\u003ctd data-start=\"2484\" data-end=\"2517\" data-col-size=\"sm\"\u003eHeater drain plug with O-ring\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2518\" data-end=\"2539\"\u003e\n\u003ctd data-start=\"2518\" data-end=\"2526\" data-col-size=\"sm\"\u003eBrand\u003c\/td\u003e\n\u003ctd data-start=\"2526\" data-end=\"2539\" data-col-size=\"sm\"\u003eSwimables\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2540\" data-end=\"2561\"\u003e\n\u003ctd data-start=\"2540\" data-end=\"2548\" data-col-size=\"sm\"\u003eModel\u003c\/td\u003e\n\u003ctd data-start=\"2548\" data-end=\"2561\" data-col-size=\"sm\"\u003eSW-41-178\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2562\" data-end=\"2592\"\u003e\n\u003ctd data-start=\"2562\" data-end=\"2576\" data-col-size=\"sm\"\u003eApplication\u003c\/td\u003e\n\u003ctd data-start=\"2576\" data-end=\"2592\" data-col-size=\"sm\"\u003ePool heaters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2593\" data-end=\"2647\"\u003e\n\u003ctd data-start=\"2593\" data-end=\"2613\" data-col-size=\"sm\"\u003eCompatible Styles\u003c\/td\u003e\n\u003ctd data-start=\"2613\" data-end=\"2647\" data-col-size=\"sm\"\u003eMasterTemp \u0026amp; Max-E-Therm style\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2648\" data-end=\"2684\"\u003e\n\u003ctd data-start=\"2648\" data-end=\"2659\" data-col-size=\"sm\"\u003eIncludes\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2659\" data-end=\"2684\"\u003eDrain plug and O-ring\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2685\" data-end=\"2727\"\u003e\n\u003ctd data-start=\"2685\" data-end=\"2696\" data-col-size=\"sm\"\u003eFunction\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"2696\" data-end=\"2727\"\u003eHeater draining and sealing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2728\" data-end=\"2747\"\u003e\n\u003ctd data-start=\"2728\" data-end=\"2740\" data-col-size=\"sm\"\u003eCondition\u003c\/td\u003e\n\u003ctd data-start=\"2740\" data-end=\"2747\" data-col-size=\"sm\"\u003eNew\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2748\" data-end=\"2770\"\u003e\n\u003ctd data-start=\"2748\" data-end=\"2754\" data-col-size=\"sm\"\u003eUPC\u003c\/td\u003e\n\u003ctd data-start=\"2754\" data-end=\"2770\" data-col-size=\"sm\"\u003e210102887564\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr data-start=\"2772\" data-end=\"2775\"\u003e\n\u003cp data-start=\"2777\" data-end=\"2827\"\u003e\u003cstrong data-start=\"2777\" data-end=\"2827\"\u003eBuy with Confidence from Benchmark Pool Supply\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"2829\" data-end=\"3085\"\u003eWhen you purchase the Swimables SW-41-178 Drain Plug with O-Ring from Benchmark Pool Supply, you’re choosing a service-ready replacement trusted by pool professionals. We stock dependable heater parts to help protect your equipment and extend service life.\u003c\/p\u003e\n\u003cp data-start=\"3087\" data-end=\"3190\"\u003eBenchmark Pool Supply is your trusted source for pool heater parts and seasonal maintenance components.\u003c\/p\u003e","brand":"Swimables","offers":[{"title":"Default Title","offer_id":43101186097226,"sku":"SW-41-178","price":6.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0637\/6580\/7178\/files\/200_173_6799392e3a2924.27701783_Main_20Image_20SW-41-178_20_281_29_large_e4bae890-4764-4f91-8114-bd10405786b0.webp?v=1765831924","url":"https:\/\/benchmarkpoolsupply.com\/products\/swimables-mastertemp-max-e-therm-drain-plug-with-oring-sw-41-178","provider":"Benchmark Pool Supply","version":"1.0","type":"link"}