{"product_id":"sandpiper-hdf4-air-end-kit","title":"Sandpiper HDF4 4\" Air End Kit for Metallic Heavy Duty Flap Valve AODD Pumps","description":"\u003cdiv class=\"sp-airend-desc\"\u003e\n\u003cstyle\u003e\n.sp-airend-desc{\n  --sp-blue:#1e3a8a;--sp-blue-light:#eef2ff;--sp-blue-soft:#f7f9ff;\n  --sp-text:#2b2f38;--sp-muted:#626977;--sp-border:#e1e5ec;--sp-white:#ffffff;\n  max-width:1100px;margin:0 auto;font-family:Arial,Helvetica,sans-serif;\n  color:var(--sp-text);line-height:1.65;\n}\n.sp-airend-desc *{box-sizing:border-box;}\n.sp-airend-desc h2{color:var(--sp-blue);font-size:27px;line-height:1.3;margin:0 0 12px;}\n.sp-airend-desc h3{color:var(--sp-blue);font-size:21px;line-height:1.35;margin:38px 0 14px;}\n.sp-airend-desc h4{color:var(--sp-blue);font-size:15px;line-height:1.4;margin:0 0 8px;}\n.sp-airend-desc p{margin:0 0 14px;font-size:15px;}\n.sp-airend-desc ul{margin:0;padding-left:20px;font-size:15px;}\n.sp-airend-desc 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var(--sp-blue);background:var(--sp-blue-soft);padding:16px 18px;margin:18px 0 34px;border-radius:0 8px 8px 0;font-size:14px;}\n.sp-faq{border-top:1px solid var(--sp-border);margin-bottom:36px;}\n.sp-faq details{border-bottom:1px solid var(--sp-border);}\n.sp-faq summary{cursor:pointer;list-style:none;color:var(--sp-blue);font-size:15px;font-weight:700;padding:17px 34px 17px 4px;position:relative;}\n.sp-faq summary::-webkit-details-marker{display:none;}\n.sp-faq summary:after{content:\"+\";position:absolute;right:5px;top:14px;font-size:22px;font-weight:400;}\n.sp-faq details[open] summary:after{content:\"−\";}\n.sp-faq details p{padding:0 4px 17px;color:var(--sp-muted);font-size:14px;}\n.sp-related-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:16px;margin:20px 0 38px;}\n.sp-related-card{border:1px solid var(--sp-border);border-radius:10px;padding:20px;background:#fff;display:flex;flex-direction:column;min-height:180px;}\n.sp-related-label{display:inline-block;width:max-content;color:var(--sp-blue);background:var(--sp-blue-light);padding:5px 9px;border-radius:16px;font-size:11px;font-weight:700;margin-bottom:12px;}\n.sp-related-card h4{font-size:16px;margin-bottom:8px;}\n.sp-related-card p{color:var(--sp-muted);font-size:13px;flex-grow:1;}\n.sp-related-card a{color:var(--sp-blue);font-size:13px;font-weight:700;text-decoration:none;}\n.sp-help-banner{background:var(--sp-blue);color:#fff;border-radius:12px;padding:28px 30px;display:flex;justify-content:space-between;align-items:center;gap:24px;flex-wrap:wrap;margin-top:40px;}\n.sp-help-banner h3{color:#fff;margin:0 0 7px;font-size:20px;}\n.sp-help-banner p{color:#e4e9f8;font-size:14px;margin:0;max-width:660px;}\n.sp-cta-links{display:flex;gap:10px;flex-wrap:wrap;}\n.sp-cta-links a{background:#fff;color:var(--sp-blue);text-decoration:none;font-weight:700;font-size:14px;padding:12px 22px;border-radius:25px;}\n@media(max-width:760px){.sp-airend-desc h2{font-size:23px;}.sp-overview-wrap{grid-template-columns:1fr;}.sp-cta-links{width:100%;}.sp-cta-links a{width:100%;text-align:center;}}\n\u003c\/style\u003e\n\u003cspan class=\"sp-eyebrow\"\u003eGenuine Sandpiper Replacement Part\u003c\/span\u003e\n\u003ch2\u003eSandpiper HDF4 4\" Air End Kit for Metallic Heavy Duty Flap Valve AODD Pumps\u003c\/h2\u003e\n\u003cp class=\"sp-intro\"\u003eGenuine Sandpiper Air End Kit replacement parts for compatible HDF4 4\" Metallic Heavy Duty Flap Valve AODD pumps. Confirm the complete pump identification and applicable air-side configuration before selecting the manufacturer part number.\u003c\/p\u003e\n\u003cp class=\"sp-atomic-answer\"\u003eThe \u003cstrong\u003eSandpiper HDF4 Air End Kit\u003c\/strong\u003e services the air distribution side of compatible Metallic Heavy Duty Flap Valve AODD pumps. Manufacturer documentation lists configuration-specific Air End Kit selections, including \u003cstrong\u003e476.247.000\u003c\/strong\u003e and \u003cstrong\u003e476.251.000\u003c\/strong\u003e. Match the installed pump configuration to the manufacturer part number before ordering.\u003c\/p\u003e\n\n\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cdiv class=\"sp-overview-wrap\"\u003e\n  \u003cdiv class=\"sp-overview-main\"\u003e\n    \u003cp\u003eThe \u003cstrong\u003eSandpiper HDF4 Air End Kit\u003c\/strong\u003e is intended for servicing the air distribution system of compatible HDF4 Heavy Duty Flap Valve AODD pumps.\u003c\/p\u003e\n    \u003cp\u003eFor the manufacturer-listed configuration on this page, the kit contents include sleeve and spool set, pilot valve body assembly, bumpers, bushings, gaskets, O-rings, seals and plungers.\u003c\/p\u003e\n    \u003cp\u003eThe correct kit should be selected from the complete pump model, nameplate information, air-side configuration and exact Sandpiper manufacturer part number. The wetted material or nominal pump size alone should not be used as the only selection criteria.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"sp-ideal-for\"\u003e\n    \u003ch4\u003eRecommended For\u003c\/h4\u003e\n    \u003cul\u003e\n      \u003cli\u003eScheduled HDF4 air-side maintenance\u003c\/li\u003e\n      \u003cli\u003eAir distribution system servicing\u003c\/li\u003e\n      \u003cli\u003eMain air valve and pilot valve service work\u003c\/li\u003e\n      \u003cli\u003eExact manufacturer part-number replacement\u003c\/li\u003e\n      \u003cli\u003eCritical maintenance spare-parts stock\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eCompatibility \u0026amp; Product Details\u003c\/h3\u003e\n\u003cdiv class=\"sp-table-wrap\"\u003e\u003ctable class=\"sp-spec-table\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eSandpiper\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCompatible Pump Model\u003c\/th\u003e\n\u003ctd\u003eHDF4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePump Series\u003c\/th\u003e\n\u003ctd\u003eHeavy Duty Flap Valve AODD Pump\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eNominal Pump Size\u003c\/th\u003e\n\u003ctd\u003e4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePart Type\u003c\/th\u003e\n\u003ctd\u003eAir End Kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCompatible Pump Construction\u003c\/th\u003e\n\u003ctd\u003eMetallic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSelection Basis\u003c\/th\u003e\n\u003ctd\u003ePump Air-Side \/ Centre Configuration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAir End Kit Contents\u003c\/th\u003e\n\u003ctd\u003eSleeve and spool set, pilot valve body assembly, bumpers, bushings, gaskets, O-rings, seals and plungers.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eManufacturer Part Number\u003c\/th\u003e\n\u003ctd\u003eVaries according to selected configuration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003c\/div\u003e\n\n\u003ch3\u003eHow to Select the Correct HDF4 Air End Kit\u003c\/h3\u003e\n\u003cp\u003eConfirm the complete HDF4 pump identification before ordering. Do not select an Air End Kit from pump size, diaphragm material or wetted construction alone when the manufacturer provides configuration-specific air-side parts.\u003c\/p\u003e\n\u003cdiv class=\"sp-benefit-grid\"\u003e\n  \u003cdiv class=\"sp-benefit-card\"\u003e\n\u003cdiv class=\"sp-benefit-number\"\u003e01\u003c\/div\u003e\n\u003ch4\u003eConfirm Pump Model\u003c\/h4\u003e\n\u003cp\u003eVerify the complete Sandpiper HDF4 pump model from the nameplate.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"sp-benefit-card\"\u003e\n\u003cdiv class=\"sp-benefit-number\"\u003e02\u003c\/div\u003e\n\u003ch4\u003eConfirm Pump Family\u003c\/h4\u003e\n\u003cp\u003eCheck that this page matches the Metallic Heavy Duty Flap Valve pump configuration.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"sp-benefit-card\"\u003e\n\u003cdiv class=\"sp-benefit-number\"\u003e03\u003c\/div\u003e\n\u003ch4\u003eCheck Air-Side Configuration\u003c\/h4\u003e\n\u003cp\u003eIdentify the applicable centre, air-valve, sleeve\/spool or other manufacturer-defined air-side option.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"sp-benefit-card\"\u003e\n\u003cdiv class=\"sp-benefit-number\"\u003e04\u003c\/div\u003e\n\u003ch4\u003eVerify Part Number\u003c\/h4\u003e\n\u003cp\u003eMatch the installed configuration to the exact genuine Sandpiper Air End Kit part number.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eSandpiper HDF4 Air End Kit Part Numbers\u003c\/h3\u003e\n\u003cdiv class=\"sp-table-wrap\"\u003e\u003ctable class=\"sp-part-table\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003ePump Air-Side \/ Centre Configuration\u003c\/th\u003e\n\u003cth\u003eManufacturer Part Number\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAluminium Centre — includes applicable aluminium and current stainless-steel wetted configurations\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e476.247.000\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCast Iron Centre\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e476.251.000\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003cdiv class=\"sp-note\"\u003e\n\u003cstrong\u003eConfiguration Note:\u003c\/strong\u003e Current HDF3\/HDF4 Aluminium and Stainless Steel manuals list 476.247.000. The Cast Iron HDF3\/HDF4 manual lists 476.251.000.\u003c\/div\u003e\n\u003cdiv class=\"sp-note\"\u003e\n\u003cstrong\u003eSelection Note:\u003c\/strong\u003e Confirm the complete pump model, serial details, air-side configuration and existing manufacturer part number before ordering. Earlier revisions, converted centre sections or special air-valve options may require additional verification.\u003c\/div\u003e\n\n\u003ch3\u003eWhy Choose Genuine Sandpiper Air End Kits?\u003c\/h3\u003e\n\u003cp\u003eGenuine Sandpiper Air End Kits are manufacturer-listed service components for compatible Sandpiper AODD pump air distribution systems. Matching the exact pump configuration and manufacturer part number helps maintenance and purchasing teams identify the correct service kit for the installed pump.\u003c\/p\u003e\n\u003cdiv class=\"sp-benefit-grid\"\u003e\n  \u003cdiv class=\"sp-benefit-card\"\u003e\n\u003cdiv class=\"sp-benefit-number\"\u003e01\u003c\/div\u003e\n\u003ch4\u003eCorrect Pump Compatibility\u003c\/h4\u003e\n\u003cp\u003eSelect the kit according to the verified HDF4 air-side configuration.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"sp-benefit-card\"\u003e\n\u003cdiv class=\"sp-benefit-number\"\u003e02\u003c\/div\u003e\n\u003ch4\u003eAir-Side Service Components\u003c\/h4\u003e\n\u003cp\u003eUse the manufacturer-listed kit intended for the applicable air distribution system.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"sp-benefit-card\"\u003e\n\u003cdiv class=\"sp-benefit-number\"\u003e03\u003c\/div\u003e\n\u003ch4\u003eExact Part Identification\u003c\/h4\u003e\n\u003cp\u003eOrder using the complete manufacturer kit number rather than pump size alone.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"sp-benefit-card\"\u003e\n\u003cdiv class=\"sp-benefit-number\"\u003e04\u003c\/div\u003e\n\u003ch4\u003eGenuine Sandpiper Replacement Parts\u003c\/h4\u003e\n\u003cp\u003eMaintain compatible pumps using genuine manufacturer service parts.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eWhen Should the HDF4 Air End Be Inspected?\u003c\/h3\u003e\n\u003cp\u003eInspect the air distribution system during planned maintenance and whenever pump cycling or air-side operation indicates that inspection or servicing may be required.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eThe pump will not cycle or cycles inconsistently\u003c\/li\u003e\n  \u003cli\u003eThe pump stalls or operates sluggishly\u003c\/li\u003e\n  \u003cli\u003eAir-side seals, O-rings or gaskets show wear or damage\u003c\/li\u003e\n  \u003cli\u003eThe main air valve or pilot valve requires servicing\u003c\/li\u003e\n  \u003cli\u003eThe pump is undergoing scheduled air-side maintenance\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cdiv class=\"sp-faq\"\u003e\n  \u003cdetails\u003e\u003csummary\u003eWhat is the Sandpiper HDF4 Air End Kit?\u003c\/summary\u003e\u003cp\u003eIt is a genuine manufacturer-listed service kit for the air distribution side of compatible Sandpiper HDF4 Heavy Duty Flap Valve AODD pumps.\u003c\/p\u003e\u003c\/details\u003e\n  \u003cdetails\u003e\u003csummary\u003eWhich Air End Kit fits the Sandpiper HDF4?\u003c\/summary\u003e\u003cp\u003eCurrent HDF3\/HDF4 Aluminium and Stainless Steel manuals list 476.247.000. The Cast Iron HDF3\/HDF4 manual lists 476.251.000. Confirm the complete pump identification before ordering.\u003c\/p\u003e\u003c\/details\u003e\n  \u003cdetails\u003e\u003csummary\u003eDoes diaphragm material determine the HDF4 Air End Kit?\u003c\/summary\u003e\u003cp\u003eNo. Diaphragm material is a wet-end selection and does not by itself identify the correct Air End Kit. Use the manufacturer-defined air-side configuration and exact part number.\u003c\/p\u003e\u003c\/details\u003e\n  \u003cdetails\u003e\u003csummary\u003eCan I select the Air End Kit by pump size alone?\u003c\/summary\u003e\u003cp\u003eNo. Pumps of the same nominal size can belong to different Sandpiper families or use different air-side configurations. Verify the complete model and manufacturer part number.\u003c\/p\u003e\u003c\/details\u003e\n  \u003cdetails\u003e\u003csummary\u003eHow do I confirm the correct HDF4 Air End Kit?\u003c\/summary\u003e\u003cp\u003eCheck the complete pump model and serial details on the nameplate, identify the applicable air-side configuration and compare it with the current Sandpiper service manual. ABS Engineering can assist with part verification.\u003c\/p\u003e\u003c\/details\u003e\n\u003c\/div\u003e\n\n\u003ch3 style=\"text-align:center;\"\u003eExplore Other Sandpiper Heavy Duty Air End Kits\u003c\/h3\u003e\n\u003cdiv class=\"sp-related-grid\"\u003e\n  \u003cdiv class=\"sp-related-card\"\u003e\n\u003cspan class=\"sp-related-label\"\u003eHeavy Duty Flap Valve\u003c\/span\u003e\u003ch4\u003eHeavy Duty Flap Valve Air End Kits\u003c\/h4\u003e\n\u003cp\u003eBrowse genuine Sandpiper Air End Kits for compatible Heavy Duty Flap Valve AODD pump models.\u003c\/p\u003e\n\u003ca href=\"\/vi\/collections\/sandpiper-heavy-duty-flap-valve-air-end-kits\"\u003eView Collection →\u003c\/a\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"sp-related-card\"\u003e\n\u003cspan class=\"sp-related-label\"\u003eHeavy Duty Ball Valve\u003c\/span\u003e\u003ch4\u003eHeavy Duty Ball Valve Air End Kits\u003c\/h4\u003e\n\u003cp\u003eExplore genuine Sandpiper Air End Kits for compatible Heavy Duty Ball Valve AODD pump models.\u003c\/p\u003e\n\u003ca href=\"\/vi\/collections\/sandpiper-heavy-duty-ball-valve-air-end-kits\"\u003eView Collection →\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"sp-help-banner\"\u003e\n  \u003cdiv\u003e\n\u003ch3\u003eNeed Help Selecting the Correct HDF4 Air End Kit?\u003c\/h3\u003e\n\u003cp\u003eSend ABS Engineering your complete Sandpiper HDF4 pump model, serial number, air-side configuration and existing Air End Kit or air-valve part number for part verification.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"sp-cta-links\"\u003e\n\u003ca href=\"\/vi\/pages\/contact\"\u003eRequest a Quote\u003c\/a\u003e\u003ca href=\"\/vi\/pages\/contact\"\u003eRequest Part Verification\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"SANDPIPER","offers":[{"title":"Aluminium Centre — includes applicable aluminium and current stainless-steel wetted configurations","offer_id":53061270208693,"sku":"476.247.000","price":0.0,"currency_code":"MYR","in_stock":true},{"title":"Cast Iron Centre","offer_id":53061270241461,"sku":"476.251.000","price":0.0,"currency_code":"MYR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0696\/6168\/7989\/files\/4f904e10-16c7-47fb-b9da-d86fdf08e0ef.png?v=1789980514","url":"https:\/\/store.abset.com\/vi\/products\/sandpiper-hdf4-air-end-kit","provider":"ABS Engineering \u0026 Trading Sdn Bhd","version":"1.0","type":"link"}