How to Identify Pump Replacement Parts
The fastest way to identify pump replacement parts is not a Google guess at the impeller. It is the nameplate: model, serial if it is still readable, voltage, and a photo of the wet end. Send those four things and a distributor can pull the exploded diagram and the orderable number. Send only "it is a 2 HP water pump" and you get a quote delay, or the wrong seal elastomer.
This is the path we use when someone writes "what is the part number" or "find me a replacement." We stock OEM parts and kits for the brands that generate those queries, including AMT, March, Flotec, Simer, and Godwin, plus the big repair-parts desks at Finish Thompson and Goulds Water Technology. Some of those brands have a parts series on this site. Some do not. That difference matters, and it is called out below by brand.
If the plate is gone, skip to the obsolete-pump section and send photos. Do not order a seal kit from a look-alike listing.
What to gather before you search or call
This is the packet that lets us quote the correct part on the first reply.
Decode the Nameplate in Four Steps
The nameplate is usually a riveted or adhesive metal tag on the motor or the adapter, not on the impeller. On close-coupled pumps it often sits on the motor barrel. On a mag-drive March, check the motor and the bracket. On a submersible like a Godwin GST, check the housing; submersibles usually carry the motor data on the same plate. Wipe it. Do not scrape the stamping off.
Locate the plate
Check the motor barrel, the adapter face, the pump bracket, and the underside of the handle. If paint buried it, a raking flashlight usually brings the stamping back.
Read model, not horsepower
Copy the full model or catalog number character for character (2761-95, 5C-MD, FP4012-10, GST05-1). Horsepower and voltage are confirmation, not the lookup key.
Capture serial and date code
Serial numbers identify that specific unit. Date codes, when present, tell us which revision of a parts list applies. Formats vary by manufacturer. Photograph them. Do not invent a decoding table.
Photograph everything
One square photo of the plate, one of the wet end, one of any number cast or inked on the failed part. Glare is the usual failure. Take a second shot at an angle.
Motor nameplate is not the pump model
The Flotec FP5500 centrifugal IOM (FP125, Rev. 4/9/09) tells the electrician to follow the motor nameplate for voltage connections. That plate is for wiring. The pump model that picks the impeller and seal is a different string (FP5512, FP5522, and so on in that IOM). AMT manuals make the same split: they ask for the pump model number and serial, then the part description from the exploded list. If you only send the motor frame or HP, we still cannot pick the wet-end kit.
AMT's own repair-parts manuals (2761-255-00 for the stainless 2761-98 family, 2761-252-00 for the cast-iron 2761-95 family, and 12SP-250-00 for the 1SP chemical series) all print the same request: provide the model number, the serial number (if any), and the part description and number as shown in the parts list. That is exactly what we need. Not a guess at "the seal."
Model vs Serial vs Part Number
Three numbers get mixed up on every parts call. Only one of them is usually enough to start. The other two confirm revision and keep you from buying a seal for the wrong elastomer.
Pump model / catalog number
Identifies: The specific pump configuration (hydraulics, materials, motor)
Need it?: Yes. This is the lookup key.
Example: AMT 2761-95, March 5C-MD 0150-0004-0200, Flotec FP4012-10
Manufacturer product / item number
Identifies: March (and some others) print a 12-digit product number that is the orderable SKU for that voltage
Need it?: Yes, when the brand uses one. It is more precise than the series name alone.
Example: March 5C-MD at 115 V is product 0150-0004-0200 on both the series manual and our catalog row
Serial number
Identifies: That physical unit. Used for warranty, revision, and factory records
Need it?: Send it if you have it. We can often quote without it if the model is complete.
Example: AMT parts manuals ask for serial "if any." Many residential nameplates never had one that survived.
Repair part / kit number
Identifies: The orderable seal, impeller, casing, or kit from the exploded list
Need it?: Best, if you already have it from the diagram. We will still confirm it against the model.
Example: 2760-304-95 Buna seal kit for the 2761-95 family; 0150-0030-0100 Series 5 impeller
Date code
Identifies: When the unit was built. Some lists change mid-production.
Need it?: Photograph it. Do not decode it yourself. Formats are not standard across brands.
Example: If no date code is present, the model plus a photo of the wet end is enough to start.
Horsepower, GPM, and "it is red" are not identifiers. They confirm you grabbed the right plate.
Worked example: AMT 2761-95 vs 2761-98
Two pumps, same series family, different wet-end materials, different seal kits. The last two characters on the AMT model are doing real work.
Complete pump
2761-95: 2761-95: 2 HP, 115/230 V, 1-phase, ODP, 2 in. x 2 in. FNPT, solids to 3/8 in.
2761-98: 2761-98: same HP and ports, stainless casing, Viton / stainless seal
Construction (AMT IOM)
2761-95: Cast iron, Buna elastomers, liquids 40 to 180 F, self-prime to 20 ft, 3450 RPM NEMA 56J (manual 2761-252-00)
2761-98: 300-series investment-cast stainless, Viton, liquids 40 to 200 F, same 20 ft lift and 3/8 in. solids (manual 2761-255-00)
Standard seal kit
2761-95: 2760-304-95 Buna seal and gasket rebuild kit (PDF + catalog)
2761-98: 2760-304-98 Viton seal and gasket rebuild kit (PDF + catalog)
1-phase impeller (2 HP)
2761-95: 2820-011-0B: catalog lists 2761-95 / 2763-95; PDF 2761-252-00 assigns 2820-011-0B to the 2761-95 2 HP column
2761-98: 2823-010-05 in the 2761-98 2 HP column of 2761-255-00
Same "2 HP self-primer" search term. Two different kits. The model suffix is the difference.
Send the nameplate. We will pull the parts list.
Photo of the plate, the failed part, and the liquid you pump. We match the exploded diagram and quote the OEM number. No phone tree.
Exploded Diagrams and Parts Lists on PumpCatalog
An exploded diagram (parts breakdown) is the drawing that numbers every piece: casing, impeller, seal seat, flapper, fasteners. A parts list is the table next to it that turns "Ref. No. 10" into an orderable number. AMT, Goulds, March, and Flotec all publish that pair. We re-host those PDFs in the document library.
Start at the Resource Center. Filter by manufacturer or search the model. The library on this storefront holds 12,014 documents: 2,575 parts breakdowns, 2,229 manuals, and 6,537 data sheets (dev catalog count). The same files also attach on the product and series pages when we have an assignment.
Search /resources first
Type the model (2761-95, 5C-MD, NPE, FP4012). Open the parts breakdown or the IOM. The exploded view is usually two or three pages in, after the safety section.
Read Ref. No., then the part number
The balloon number on the drawing is not the orderable SKU. Match it to the table. AMT's 2761 lists print "KIT" rows for the seal kit that already include the casing seal, shaft seal, and flapper.
Goulds NPE is the industrial version of the same idea
RNPE R7 numbers the casing (item 100), seal housing, and Type 21 5/8 in. mechanical seal by seal code. Seal code 2 (carbon / silicon carbide / EPR / 316 SS) is part 10K18. The 1ST 1 x 1-1/4 in. casing is 1L81. Both numbers match the PDF and the catalog row.
Kits beat shopping piece by piece
If the manual has a KIT row, order that unless you know only one piece failed. AMT 2760-304-95 includes Ref. Nos. 6, 7, 8, and 14 (casing seal, shaft seal, flapper) on the 2761-95 list.
No diagram on the product page? Open /resources, then the brand parts category linked in the next section. If both are empty for that brand (Simer and Godwin are the usual cases), send the nameplate. We will use factory literature that is not on the public finder yet, or cross to the current equivalent.
Brand Parts Desks: AMT, March, Flotec, Simer, Godwin
These are the brands behind the long-tail parts queries hitting the site. Each card is a live category. If a brand has no parts series, that is stated, not papered over.
3,448 repair parts plus 555 kits under AMT Pump Repair Kits. Complete self-primers live in self-priming electric pumps. Example: chemical pump 1SP05C-1P (0.5 HP, 115/208/230 V, 1-phase TEFC, 1 in. x 1 in. FNPT, EPDM/EPR seal, solids to 1/4 in. per the catalog row). The 12SP-250-00 parts list assigns impeller kit 1A11-010-95 and EPDM/EPR seal 1641-161-91 to that model.
Watch for: AMT suffix letters change materials. 2761-95 is Buna / cast iron. 2761-98 is Viton / stainless. Do not swap those kits.
777 repair parts and kits. Series 5 complete pumps are under Series 5 mag-drive. Model 5C-MD at 115 V is product 0150-0004-0200: 1/8 HP (0.125 HP), 1 in. FPT suction x 1/2 in. MPT discharge, polypropylene wet end, Buna-N O-ring, ceramic shaft, submersible only. The series manual rates it 14.5 GPM and 27 ft at 60 Hz, 50 psi max internal pressure, 130 F max liquid. The molded impeller that fits 5C-MD, LC-5C-MD, and AC-5C-MD is 0150-0030-0100. The Buna-N housing O-ring is 0750-0987-1000 (PDF: 0.078 CS x 2.834 ID; catalog: 2 mm CS x 72 mm ID, same ring).
Watch for: March 5C-MD cannot run dry and is not self-priming (flooded suction). Air-cooled TE-5C-MD-AC is a different product number: 0150-0026-0800, wet-end kit 0150-0148-0200.
24 Parts2O kits and accessories, plus complete jet, centrifugal, and sprinkler pumps under centrifugal, booster, jet and sprinkler. FP4012-10 is the 1/2 HP thermoplastic shallow-well jet: 1.25 in. NPT suction x 1 in. NPT discharge, 115/230 V, 8 GPM headline rating, 25 ft max lift (catalog row and the FP4012/4022/4032 family datasheet agree on those figures). Seal-and-gasket kit FPP1500 is listed on the catalog row for models 3305P, 3307P, 3310P and Flotec FP4312, FP4322, FP4332.
Watch for: The FP5500 centrifugal IOM (FP125) calls shaft seal U109-6A. That Pentair number is stocked here as U109-6A under Berkeley water-system parts and is flagged replaced by U109-6B. Shared Pentair numbers jump brands. Confirm the pump model before you click.
Simer is a Pentair residential line on this site: 45 complete pumps and accessories, no repair-parts subcategory, and no Simer-titled PDF in the document library. Live examples: 2161 1/4 HP submersible sump (zinc/thermoplastic, 1.5 in. FNPT, 3,200 GPH, 20 ft max lift, tethered float) and 2205C 1/2 HP cast-iron shallow-well jet (8.5 GPM, 25 ft max lift, 65 PSI per the catalog row).
Watch for: If you need a Simer seal or impeller, send the nameplate. Some Pentair Parts2O kits cross families, but we will not guess a kit from the brand name alone.
Godwin on this catalog is a short dewatering lineup: 20 published items. Complete pumps are GST05 / GST10 submersible trash and GTP / GWP wet-prime, plus accessories (hose kits, the WK12 wheel kit for 2 in. and 3 in. GTP/GWP). ESTR0005VC000 is the GST05-1: 1/2 HP, 1-phase 115 V, 2 in. discharge, 1 in. solids (catalog). The GST datasheet rates GST05 at 60 GPM, 33 ft max head, 90 F max fluid, silicon-carbide upper and lower mechanical seals, and includes a labeled construction drawing (impeller, seals, volute), not an orderable spare-parts table.
Watch for: There is no Godwin repair-parts series on this storefront. If you need a GST seal or impeller, send the nameplate. We will source from Xylem / Godwin literature, not from a generic trash-pump kit.
When the query is industrial, start at Finish Thompson pump repair parts (4,539 items) or Goulds pump repair parts (8,460 items). Goulds NPE exploded parts are a typical factory list: casing 1L81 for the 1ST 1 x 1-1/4 in. NPE, seal 10K18 for the 5/8 in. Type 21 carbon / SiC / EPR code-2 seal (RNPE R7 + catalog).
Watch for: Finish Thompson also lists specialty aftermarket parts (Pump Fit numbers such as PF00-1010-58, cataloged as a Santoprene diaphragm compatible with Wilden 00-1010-58). That is a compatible part, not an FTI OEM wet end. See the next section before you treat it as a drop-in.
OEM vs Compatible Aftermarket Parts
OEM means the number on the manufacturer's parts list, sold as that brand's part. Compatible / aftermarket means a third-party part dimensioned to replace it. Both exist on this site. They are not the same quote.
OEM (factory number)
The number printed on the exploded list: AMT 2760-304-95, March 0150-0030-0100, Goulds 10K18. Materials, elastomer, and fit are the ones the pump was built with. Warranty and chemical compatibility conversations stay straightforward.
Use OEM when the liquid, temperature, or seal face is not a casual water job.
Compatible / aftermarket
Sold under a different brand or a "fits" number. On this catalog that includes Finish Thompson specialty aftermarket (Pump Fit / Wilden-compatible diaphragms) and Nomad parts compatible with Warren Rupp (915 items). The listing names the OEM number it replaces. Confirm elastomer and bolt pattern, not just the diaphragm size.
Use compatible when the OEM is obsolete, lead time is unacceptable, and the duty is documented as a known cross.
A superseded number is not automatically a drop-in
AMT catalog row 1640-161-90 is a 5/8 in. Buna Type 16 carbon/ceramic seal. The same row says it is replaced by 1641-161-91, which the 1SP chemical parts list identifies as EPDM/EPR. That is an elastomer change, not a silent rename. The Flotec/Berkeley pair U109-6A to U109-6B is a cleaner Pentair supersession (same 5/8 in. Type 6 Buna family). Read the replacement note. Do not assume the new number is the old seal in a new bag.
When the Pump Is Obsolete
Obsolete here means the complete pump is no longer a current catalog model, or the parts list has moved to a successor number. It does not mean we shrug. The path is: identify the old model from the plate, find the current parts list or the superseding pump, then decide repair vs replace.
1. Find the last published parts list
Search Resources for the model even if the complete pump is gone. AMT still publishes the 3890 thru 389A 1-1/2 in. self-primer list (3890-253-00), and older AMT part numbers stay orderable long after the pump leaves the series page: casing 3890-001-98 is a stainless 1.5 x 1.5 self-prime casing still live on the parts desk (catalog row). The pump may be out of the current series page. The part number can still be live.
2. Cross to the current equivalent
Match ports, materials, RPM, seal elastomer, and duty (GPM / head), not just horsepower. AMT 2761-95 is a current 2 in. cast-iron self-primer if the old unit was a 276x-95 family member. March 5C-MD 0150-0004-0200 is the current 115 V polypropylene Series 5 if the plate says 5C-MD and the old product number is gone.
3. Use a documented aftermarket only when the OEM is gone
AODD wear parts are the usual case. Nomad and Finish Thompson specialty aftermarket list the OEM number they replace. If the listing does not name your OEM number, it is not a cross.
4. When the plate is gone, stop searching and send photos
Measure suction and discharge, count impeller vanes if you can see them, note the motor frame, and request a quote. We would rather ask one follow-up than ship a seal that eats the shaft.
Ordering by horsepower
2761-95 and 2766-95 are both AMT self-primers. They do not share an impeller. The 2761-252-00 list gives the 2 HP column a different impeller from the 3 HP column. HP is a check, not a key.
Ignoring the elastomer suffix
Buna, Viton, and EPDM are not interchangeable because the old one "looks like rubber." AMT 2760-304-95 is Buna. 2760-304-98 is Viton. March 0750-0987-1000 is Buna-N; 0750-0986-1000 is the Viton ring for the same Series 4/5 groove.
Trusting a "fits most 1/2 HP jet pumps" listing
Flotec FPP1500 names specific models on the catalog row. If your plate is FP4012-10, that kit's listed fitment is a different Flotec family. Match the model list, or ask.
Skipping the photo when the plate is worn
A blurry plate plus "I think it is a March" is how you get a 5C-MD impeller for a TE-5.5. One angled photo usually settles it.
Frequently Asked Questions
What is the part number for my pump?
The nameplate model is the pump number, not the repair-part number. We take that model (and serial if you have it), open the exploded list, and read the orderable number for the seal, impeller, or kit. AMT's own manuals ask for model, serial if any, and the part description from that list. Photograph the plate and send it via contact if you do not want to walk the PDF yourself.
Where do I find Flotec water pump replacement parts?
Start at Flotec Parts, Kits and Accessories (Parts2O kits such as FPP1500) and the complete-pump series under Flotec. The FP5500 centrifugal IOM includes a numbered exploded list. Some Pentair seal numbers (U109-6A / U109-6B) are stocked under Berkeley water-system parts because Pentair shares them across brands.
Do you have March pump replacement parts?
Yes. March repair parts and kits has 777 items, including Series 5 impeller 0150-0030-0100 and O-ring 0750-0987-1000. Complete Series 5 pumps are at Series 5 mag-drive. Bring the 12-digit product number from the plate when you can (0150-0004-0200 is 5C-MD 115 V).
Where are AMT replacement parts?
AMT pump repair parts and AMT / IPT / Gorman-Rupp kits. For a 2761-95, the standard seal kit is 2760-304-95. For 2761-98 it is 2760-304-98. The exploded lists are in the 2761-252-00 and 2761-255-00 manuals in Resources.
Do you have Simer pump replacement parts or a Godwin pump parts diagram?
Simer: complete pumps only on this site (Simer residential pumps), no parts subcategory and no Simer PDF in the library. Godwin: complete GST05/GST10 and GTP/GWP pumps plus accessories. The GST datasheet has a labeled construction drawing, not a spare-parts table, and there is no Godwin repair-parts series here. For either brand, send the nameplate and we will source the part or the current equivalent.
Can you find me a replacement if the pump is obsolete?
Usually. We start with the last parts list for that model, then cross to the current series on ports, materials, RPM, and duty. If the OEM part is gone, we only use a compatible number that names your OEM number (see Nomad and Finish Thompson aftermarket). If the plate is unreadable, request a quote with photos. Do not order from a look-alike photo.