{"product_id":"comet-5026-0116-00-rebuild-kit-with-check-valves-diaphragm-o-rings-oem-replacement-part","title":"Comet 5026.0116.00 Rebuild Kit with Check Valves, Diaphragm \u0026 O-Rings – OEM Replacement Part","description":"\u003cdiv class=\"\" data-turn-id-container=\"88d023b6-11a9-4828-a7dd-1c72ef000c00\" data-is-intersecting=\"true\"\u003e\n\u003csection class=\"text-token-text-primary w-full focus:outline-none has-data-writing-block:pointer-events-none [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-(--sticky-padding-top)\" dir=\"auto\" data-turn-id=\"88d023b6-11a9-4828-a7dd-1c72ef000c00\" data-turn-id-container=\"88d023b6-11a9-4828-a7dd-1c72ef000c00\" data-testid=\"conversation-turn-433\" data-turn=\"user\"\u003e\u003c\/section\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"\" data-turn-id-container=\"request-6a35562f-a1fc-83ea-bfdd-f10b85f84e9a-23\" data-is-intersecting=\"true\"\u003e\n\u003csection class=\"text-token-text-primary w-full focus:outline-none has-data-writing-block:pointer-events-none [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" data-turn-id=\"request-6a35562f-a1fc-83ea-bfdd-f10b85f84e9a-23\" data-turn-id-container=\"request-6a35562f-a1fc-83ea-bfdd-f10b85f84e9a-23\" data-testid=\"conversation-turn-434\" data-turn=\"assistant\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\"\u003e\n\u003cdiv data-conversation-screenshot-content=\"\" class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\u003cdiv data-message-author-role=\"assistant\" data-message-id=\"107df9b4-1859-4922-96c9-907a316cf299\" dir=\"auto\" data-message-model-slug=\"gpt-5-5\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+\u0026amp;]:mt-1\" data-turn-start-message=\"true\" tabindex=\"0\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e\n\u003cdiv class=\"streaming-animation markdown prose dark:prose-invert wrap-break-word w-full light markdown-new-styling\"\u003e\n\u003cp data-start=\"0\" data-end=\"148\"\u003e\u003cstrong data-start=\"0\" data-end=\"16\"\u003ePart Number:\u003c\/strong\u003e 3989\u003cbr data-start=\"21\" data-end=\"24\"\u003e\u003cstrong data-start=\"24\" data-end=\"37\"\u003eCategory:\u003c\/strong\u003e Agricultural Pump Parts → Repair Kits → Comet Pump Repair Kits\u003cbr data-start=\"100\" data-end=\"103\"\u003e\u003cstrong data-start=\"103\" data-end=\"112\"\u003eType:\u003c\/strong\u003e Comet 5026.0116.00 MC25 Rebuild Kit\u003c\/p\u003e\n\u003chr data-start=\"150\" data-end=\"153\"\u003e\n\u003cp data-start=\"258\" data-end=\"661\"\u003eThe \u003cstrong data-start=\"262\" data-end=\"314\"\u003eComet 5026.0116.00 MC25 Rebuild Kit (Part #3989)\u003c\/strong\u003e is a genuine OEM repair kit designed to restore the performance, pressure output, and reliability of compatible \u003cstrong data-start=\"427\" data-end=\"457\"\u003eComet MC25 diaphragm pumps\u003c\/strong\u003e. This comprehensive rebuild kit includes replacement \u003cstrong data-start=\"511\" data-end=\"584\"\u003echeck valves, diaphragms, O-rings, and a pulsation dampener diaphragm\u003c\/strong\u003e, providing the critical wear components needed for a complete pump overhaul.\u003c\/p\u003e\n\u003chr data-start=\"1267\" data-end=\"1270\"\u003e\n\u003ch2 data-section-id=\"939trr\" data-start=\"1272\" data-end=\"1298\"\u003eKey Features \u0026amp; Benefits\u003c\/h2\u003e\n\u003cul data-start=\"1300\" data-end=\"1816\"\u003e\n\u003cli data-section-id=\"8lleyu\" data-start=\"1300\" data-end=\"1349\"\u003eGenuine Comet Pumps OEM replacement rebuild kit\u003c\/li\u003e\n\u003cli data-section-id=\"12bxgah\" data-start=\"1350\" data-end=\"1402\"\u003eDesigned for compatible Comet MC25 diaphragm pumps\u003c\/li\u003e\n\u003cli data-section-id=\"tkskvc\" data-start=\"1403\" data-end=\"1475\"\u003eIncludes valves, diaphragms, O-rings, and pulsation dampener diaphragm\u003c\/li\u003e\n\u003cli data-section-id=\"1003dc1\" data-start=\"1476\" data-end=\"1508\"\u003eComplete pump rebuild solution\u003c\/li\u003e\n\u003cli data-section-id=\"18m46on\" data-start=\"1509\" data-end=\"1549\"\u003eRestores flow and pressure performance\u003c\/li\u003e\n\u003cli data-section-id=\"tlepkh\" data-start=\"1550\" data-end=\"1595\"\u003eHelps eliminate internal and external leaks\u003c\/li\u003e\n\u003cli data-section-id=\"157bl7a\" data-start=\"1596\" data-end=\"1639\"\u003eMaintains pump efficiency and reliability\u003c\/li\u003e\n\u003cli data-section-id=\"18cehnk\" data-start=\"1640\" data-end=\"1678\"\u003eOEM-quality components and materials\u003c\/li\u003e\n\u003cli data-section-id=\"z5jfpn\" data-start=\"1679\" data-end=\"1710\"\u003eExcellent chemical resistance\u003c\/li\u003e\n\u003cli data-section-id=\"1xq6xti\" data-start=\"1711\" data-end=\"1739\"\u003eReduces equipment downtime\u003c\/li\u003e\n\u003cli data-section-id=\"lmun4u\" data-start=\"1740\" data-end=\"1767\"\u003eExtends pump service life\u003c\/li\u003e\n\u003cli data-section-id=\"gidkr3\" data-start=\"1768\" data-end=\"1816\"\u003eIdeal for preventative maintenance and repairs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1818\" data-end=\"1821\"\u003e\n\u003ch2 data-section-id=\"1cgu054\" data-start=\"1823\" data-end=\"1850\"\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cp data-start=\"1852\" data-end=\"1873\"\u003e\u003cstrong data-start=\"1852\" data-end=\"1868\"\u003ePart Number:\u003c\/strong\u003e 3989\u003c\/p\u003e\n\u003cp data-start=\"1875\" data-end=\"1904\"\u003e\u003cstrong data-start=\"1875\" data-end=\"1892\"\u003eManufacturer:\u003c\/strong\u003e Comet Pumps\u003c\/p\u003e\n\u003cp data-start=\"1906\" data-end=\"1948\"\u003e\u003cstrong data-start=\"1906\" data-end=\"1935\"\u003eManufacturer Part Number:\u003c\/strong\u003e 5026.0116.00\u003c\/p\u003e\n\u003cp data-start=\"1950\" data-end=\"2000\"\u003e\u003cstrong data-start=\"1950\" data-end=\"1973\"\u003ePump Compatibility:\u003c\/strong\u003e Comet MC25 Diaphragm Pumps\u003c\/p\u003e\n\u003cp data-start=\"2002\" data-end=\"2036\"\u003e\u003cstrong data-start=\"2002\" data-end=\"2019\"\u003eProduct Type:\u003c\/strong\u003e Pump Rebuild Kit\u003c\/p\u003e\n\u003cp data-start=\"2038\" data-end=\"2062\"\u003e\u003cstrong data-start=\"2038\" data-end=\"2058\"\u003eOEM Replacement:\u003c\/strong\u003e Yes\u003c\/p\u003e\n\u003chr data-start=\"2064\" data-end=\"2067\"\u003e\n\u003ch2 data-section-id=\"x622x5\" data-start=\"2069\" data-end=\"2084\"\u003eKit Contents\u003c\/h2\u003e\n\u003cul data-start=\"2086\" data-end=\"2159\"\u003e\n\u003cli data-section-id=\"1qhpxo5\" data-start=\"2086\" data-end=\"2100\"\u003eCheck Valves\u003c\/li\u003e\n\u003cli data-section-id=\"rs9iq6\" data-start=\"2101\" data-end=\"2118\"\u003ePump Diaphragms\u003c\/li\u003e\n\u003cli data-section-id=\"1460b3f\" data-start=\"2119\" data-end=\"2128\"\u003eO-Rings\u003c\/li\u003e\n\u003cli data-section-id=\"1uaoome\" data-start=\"2129\" data-end=\"2159\"\u003ePulsation Dampener Diaphragm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2161\" data-end=\"2259\"\u003eThis kit contains the major wear components commonly replaced during a complete MC25 pump rebuild.\u003c\/p\u003e\n\u003chr data-start=\"2261\" data-end=\"2264\"\u003e\n\u003ch2 data-section-id=\"vx2wyp\" data-start=\"2266\" data-end=\"2288\"\u003eCommon Applications\u003c\/h2\u003e\n\u003cul data-start=\"2290\" data-end=\"2592\"\u003e\n\u003cli data-section-id=\"q5tme4\" data-start=\"2290\" data-end=\"2313\"\u003eAgricultural sprayers\u003c\/li\u003e\n\u003cli data-section-id=\"12ecgio\" data-start=\"2314\" data-end=\"2346\"\u003eFertilizer application systems\u003c\/li\u003e\n\u003cli data-section-id=\"1njdtxw\" data-start=\"2347\" data-end=\"2377\"\u003eHerbicide spraying equipment\u003c\/li\u003e\n\u003cli data-section-id=\"e1ecok\" data-start=\"2378\" data-end=\"2409\"\u003ePesticide application systems\u003c\/li\u003e\n\u003cli data-section-id=\"q45s04\" data-start=\"2410\" data-end=\"2437\"\u003eTurf management equipment\u003c\/li\u003e\n\u003cli data-section-id=\"11p7m2e\" data-start=\"2438\" data-end=\"2464\"\u003eOrchard spraying systems\u003c\/li\u003e\n\u003cli data-section-id=\"1jn4aup\" data-start=\"2465\" data-end=\"2491\"\u003eVineyard spray equipment\u003c\/li\u003e\n\u003cli data-section-id=\"b2jhqp\" data-start=\"2492\" data-end=\"2519\"\u003eChemical transfer systems\u003c\/li\u003e\n\u003cli data-section-id=\"7ykrmj\" data-start=\"2520\" data-end=\"2552\"\u003eCommercial spraying operations\u003c\/li\u003e\n\u003cli data-section-id=\"1wvu1ft\" data-start=\"2553\" data-end=\"2592\"\u003ePump maintenance and rebuild services\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2594\" data-end=\"2597\"\u003e\n\u003ch2 data-section-id=\"ctfpuh\" data-start=\"2599\" data-end=\"2622\"\u003ePerformance Benefits\u003c\/h2\u003e\n\u003cul data-start=\"2624\" data-end=\"2895\"\u003e\n\u003cli data-section-id=\"n0h6mi\" data-start=\"2624\" data-end=\"2660\"\u003eRestores original pump performance\u003c\/li\u003e\n\u003cli data-section-id=\"pmjfyo\" data-start=\"2661\" data-end=\"2698\"\u003eMaintains proper operating pressure\u003c\/li\u003e\n\u003cli data-section-id=\"15xbel\" data-start=\"2699\" data-end=\"2726\"\u003eImproves flow consistency\u003c\/li\u003e\n\u003cli data-section-id=\"u1i56k\" data-start=\"2727\" data-end=\"2753\"\u003eReduces internal leakage\u003c\/li\u003e\n\u003cli data-section-id=\"1ym1z2\" data-start=\"2754\" data-end=\"2780\"\u003eEnhances pump efficiency\u003c\/li\u003e\n\u003cli data-section-id=\"16nl7q9\" data-start=\"2781\" data-end=\"2820\"\u003eImproves reliability and service life\u003c\/li\u003e\n\u003cli data-section-id=\"1w0cqio\" data-start=\"2821\" data-end=\"2852\"\u003eReduces unexpected breakdowns\u003c\/li\u003e\n\u003cli data-section-id=\"5f0e5h\" data-start=\"2853\" data-end=\"2895\"\u003eSupports consistent spraying performance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2897\" data-end=\"2900\"\u003e\n\u003ch2 data-section-id=\"1kmft8d\" data-start=\"2902\" data-end=\"2942\"\u003eSigns Your MC25 Pump Needs Rebuilding\u003c\/h2\u003e\n\u003cp data-start=\"2944\" data-end=\"3001\"\u003eReplace worn diaphragms, valves, and seals if you notice:\u003c\/p\u003e\n\u003cul data-start=\"3003\" data-end=\"3235\"\u003e\n\u003cli data-section-id=\"12cjody\" data-start=\"3003\" data-end=\"3028\"\u003eReduced pressure output\u003c\/li\u003e\n\u003cli data-section-id=\"1q90o20\" data-start=\"3029\" data-end=\"3047\"\u003eLower flow rates\u003c\/li\u003e\n\u003cli data-section-id=\"1pqm1ew\" data-start=\"3048\" data-end=\"3085\"\u003ePulsating or inconsistent operation\u003c\/li\u003e\n\u003cli data-section-id=\"ghxk9b\" data-start=\"3086\" data-end=\"3110\"\u003eInternal bypass issues\u003c\/li\u003e\n\u003cli data-section-id=\"1qdpcl6\" data-start=\"3111\" data-end=\"3126\"\u003eFluid leakage\u003c\/li\u003e\n\u003cli data-section-id=\"t5kute\" data-start=\"3127\" data-end=\"3167\"\u003eDifficulty maintaining system pressure\u003c\/li\u003e\n\u003cli data-section-id=\"3i9x91\" data-start=\"3168\" data-end=\"3202\"\u003eExcessive wear during inspection\u003c\/li\u003e\n\u003cli data-section-id=\"16ntlyb\" data-start=\"3203\" data-end=\"3235\"\u003eReduced spraying effectiveness\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"3237\" data-end=\"3240\"\u003e\n\u003ch2 data-section-id=\"1ttswun\" data-start=\"3242\" data-end=\"3291\"\u003eImportance of the Pulsation Dampener Diaphragm\u003c\/h2\u003e\n\u003cp data-start=\"3293\" data-end=\"3341\"\u003eThe included pulsation dampener diaphragm helps:\u003c\/p\u003e\n\u003cul data-start=\"3343\" data-end=\"3539\"\u003e\n\u003cli data-section-id=\"1q8buta\" data-start=\"3343\" data-end=\"3373\"\u003eReduce pressure fluctuations\u003c\/li\u003e\n\u003cli data-section-id=\"ncract\" data-start=\"3374\" data-end=\"3394\"\u003eSmooth pump output\u003c\/li\u003e\n\u003cli data-section-id=\"11ezbdh\" data-start=\"3395\" data-end=\"3425\"\u003eImprove spraying consistency\u003c\/li\u003e\n\u003cli data-section-id=\"1cxlsjd\" data-start=\"3426\" data-end=\"3455\"\u003eProtect plumbing components\u003c\/li\u003e\n\u003cli data-section-id=\"nt1d9s\" data-start=\"3456\" data-end=\"3492\"\u003eEnhance overall system performance\u003c\/li\u003e\n\u003cli data-section-id=\"1wvs122\" data-start=\"3493\" data-end=\"3539\"\u003eReduce vibration throughout the spray system\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"3541\" data-end=\"3544\"\u003e\n\u003ch2 data-section-id=\"16dprsq\" data-start=\"3546\" data-end=\"3567\"\u003eInstallation Notes\u003c\/h2\u003e\n\u003col data-start=\"3569\" data-end=\"4036\"\u003e\n\u003cli data-section-id=\"1d5nnad\" data-start=\"3569\" data-end=\"3634\"\u003eDisconnect power and relieve system pressure before servicing.\u003c\/li\u003e\n\u003cli data-section-id=\"18y9yiw\" data-start=\"3635\" data-end=\"3674\"\u003eFlush and drain the pump thoroughly.\u003c\/li\u003e\n\u003cli data-section-id=\"1l07c2j\" data-start=\"3675\" data-end=\"3737\"\u003eDisassemble the pump according to Comet service procedures.\u003c\/li\u003e\n\u003cli data-section-id=\"1gasuor\" data-start=\"3738\" data-end=\"3805\"\u003eRemove worn diaphragms, valves, O-rings, and dampener diaphragm.\u003c\/li\u003e\n\u003cli data-section-id=\"1eyu42x\" data-start=\"3806\" data-end=\"3861\"\u003eInspect internal pump components for wear or damage.\u003c\/li\u003e\n\u003cli data-section-id=\"ixy8te\" data-start=\"3862\" data-end=\"3920\"\u003eInstall all new components included in the rebuild kit.\u003c\/li\u003e\n\u003cli data-section-id=\"qehph9\" data-start=\"3921\" data-end=\"3976\"\u003eReassemble according to manufacturer specifications.\u003c\/li\u003e\n\u003cli data-section-id=\"1npz79l\" data-start=\"3977\" data-end=\"4036\"\u003eTest for proper pressure, flow, and leak-free operation.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp data-start=\"4038\" data-end=\"4163\"\u003e\u003cstrong data-start=\"4038\" data-end=\"4052\"\u003eImportant:\u003c\/strong\u003e Replacing all wear components at the same time helps maximize pump performance, reliability, and service life.\u003c\/p\u003e\n\u003chr data-start=\"4165\" data-end=\"4168\"\u003e\n\u003ch2 data-section-id=\"8fimbm\" data-start=\"4170\" data-end=\"4200\"\u003eMaintenance Recommendations\u003c\/h2\u003e\n\u003cul data-start=\"4202\" data-end=\"4469\"\u003e\n\u003cli data-section-id=\"ix9f0g\" data-start=\"4202\" data-end=\"4238\"\u003eFlush the pump after chemical use.\u003c\/li\u003e\n\u003cli data-section-id=\"1kwovm9\" data-start=\"4239\" data-end=\"4281\"\u003eInspect diaphragms and valves regularly.\u003c\/li\u003e\n\u003cli data-section-id=\"15bcbk9\" data-start=\"4282\" data-end=\"4317\"\u003eMonitor pressure and flow output.\u003c\/li\u003e\n\u003cli data-section-id=\"12ptu6h\" data-start=\"4318\" data-end=\"4382\"\u003eCheck pulsation dampener performance during service intervals.\u003c\/li\u003e\n\u003cli data-section-id=\"sfm6dz\" data-start=\"4383\" data-end=\"4413\"\u003eReplace worn seals promptly.\u003c\/li\u003e\n\u003cli data-section-id=\"7ur5f6\" data-start=\"4414\" data-end=\"4469\"\u003eFollow Comet Pumps recommended maintenance schedules.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e","brand":"Comet","offers":[{"title":"Default Title","offer_id":53427371409771,"sku":null,"price":250.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0917\/9201\/5723\/files\/CometPumpslogo_a1deeebf-d771-4500-9f8a-2e07370eec83.avif?v=1782444345","url":"https:\/\/generalsprayers.com\/products\/comet-5026-0116-00-rebuild-kit-with-check-valves-diaphragm-o-rings-oem-replacement-part","provider":"GeneralSprayers","version":"1.0","type":"link"}