Franklin Electric FPS NC Series submersible non-clog pumps for raw sewage, effluent and dewatering in commercial and industrial lift stations. The 3NC has a 3 in flanged discharge and passes 2.5 in solids; the 4NC and 4NCH have 4 in flanges and pass 3 in solids. The 3NC and 4NC are 3 and 5 HP, in 230V single phase or 200–575V three phase, up to 555 GPM. The 4NCH runs 7.5 to 20 HP on an IE3 premium-efficiency motor, up to 948 GPM and 114 ft of head. Dual silicon carbide seals, a seal-fail probe and an adjustable wear plate come standard, and repair parts are listed by Franklin order number. Call 1-888.510.4036.
Franklin Electric NC Series Non-Clog Pump Repair Parts
Price
From $7.12
Franklin Electric Non-Clog Sewage Pumps
Franklin Electric · FPS Wastewater
Franklin Electric Non-Clog Sewage Pumps
FPS 3NC, 4NC and 4NCH submersible solids-handling pumps for raw sewage, effluent and dewatering in commercial and industrial lift stations: 3 in and 4 in ANSI flanged discharge, solids to 3 in, 3 to 20 HP, up to 948 GPM and 114 ft of head, with dual silicon carbide seals and a seal-fail probe.
3 Series3NC · 4NC · 4NCH
3–20 HP1Ph and 3Ph
948 GPMMax flow
114 ftMax head
3 inSpherical solids
A non-clog pump, also called a solids-handling pump, is a submersible sewage pump that passes the solids whole through an open impeller rather than grinding them, so it can move large volumes of raw wastewater through a flanged force main. Franklin Electric builds the FPS NC Series in three families. The 3NC and 4NC are 3 and 5 HP pumps with oil-filled motors in single or three phase; the 4NCH steps up to 7.5–20 HP on an air-filled IE3 premium-efficiency motor for higher heads. All three are built for raw, unscreened domestic sewage, effluent, irrigation and general dewatering in commercial and industrial service — lift stations for schools, strip centers, apartment complexes, RV parks, campgrounds, plants and small municipal systems.
We supply the full U.S. 60 Hz NC range, from 230V single phase to 575V three phase, plus the base elbows, lift-out kits, starter kit and repair parts. Our engineering-led selection matches the impeller trim or horsepower to your peak inflow and total dynamic head against the Franklin curve — call 1-888.510.4036 or email sales@watermainsupply.com. Genuine Franklin Electric equipment, factory-new in original packaging — sold and supported by Watermain Supply, an independent industrial supplier.
Will It Work for Me?
Four checks that settle most non-clog pump orders.
Warranty
Franklin warrants the NC Series for 2 years from the date of original purchase by the consumer, per the NC Series owner’s manual. Single-phase 3NC and 4NC pumps must run from an FPS control panel or the 520851 starter kit for proper operation and warranty. Full terms are in the manufacturer’s manual.
Reliability
Tandem silicon carbide seals, upper and lower, in an oil bath, with a seal-fail probe that warns before water reaches the motor. Semi-open ductile iron impeller, field-adjustable wear plate, AISI 420 stainless shaft, and bearings rated for a B-10 life of 30,000 hours (100,000 on the 4NCH).
Fit
Non-abrasive spherical solids to 2.5 in (3NC) or 3 in (4NC, 4NCH). Continuous duty up to 104 °F fully submerged. 3 in or 4 in ANSI Class 125 flanged discharge. 3NC and 4NC in 230V single phase or 200/230V, 460V and 575V three phase; 4NCH in 208-230V or 460V three phase only.
Size It Now
Send the peak inflow in GPM, the static lift, the force main length and size, and your voltage and phase. We pick the trim or horsepower from the Franklin curve.
Three families by discharge size and horsepower. Pick the family from the solids and the flange, then the trim or horsepower from the duty point.
FPS 3NC
3 in flange · 3 and 5 HP
555 GPMMax flow
58 ftMax head
2.5 inSpherical solids
22 models1Ph and 3Ph
The 3 in pump for smaller lift stations and 3 in force mains. Oil-filled Class F motor, impeller trims from 160 to 196 mm, 50 ft cord standard with 30 ft builds on some models.
Key specs
230V 1Ph; 200/230V, 460V and 575V 3Ph
1750 RPM; cCSAus; 250–260 lb
Overall height 28.5 in (1Ph), 26.7 in (3Ph)
Best forSmall commercial and multifamily lift stations, effluent transfer and dewatering up to about 500 GPM.
The same motor and seal package as the 3NC with a 4 in discharge that passes 3 in solids, for stations that need the bigger solids passage or a 4 in force main. Impeller trims from 146 to 182 mm.
Key specs
230V 1Ph; 200/230V, 460V and 575V 3Ph
1750 RPM; cCSAus; 260–265 lb
Overall height 28.9 in (1Ph), 27.2 in (3Ph)
Best forRaw sewage with larger solids, 4 in force mains, and replacing 4 in pumps at low to moderate head.
The high-head, high-flow family: each horsepower has its own hydraulic, from 741 GPM at 20 ft (7.5 HP) to 83 GPM at 110 ft (20 HP). Air-filled IE3 motor with Class H insulation and an IP68 stator enclosure.
Key specs
208-230V or 460V 3Ph only
B-10 bearing life 100,000 h minimum
430–606 lb; overall height 35.1–37.9 in
Best forLong or uphill force mains, larger lift stations and municipal service.
From the FPS Wastewater Catalog (M5276), the NC Series brochure (M5141), the bid specifications and our listings.
Feature
3NC
4NC
4NCH
Discharge
3 in ANSI Class 125 flange
4 in ANSI Class 125 flange
4 in ANSI Class 125 flange
Spherical solids
2.5 in
3 in
3 in
Motor HP
3 and 5
3 and 5
7.5, 10, 12.5, 15, 20
Max flow
555 GPM
545 GPM
948 GPM
Max head (shut-off)
58 ft
49 ft
114 ft
How you select
Impeller trim 160–196 mm
Impeller trim 146–182 mm
Horsepower (own hydraulic each)
Motor
Oil-filled, Class F
Oil-filled, Class F
Air-filled IE3, Class H, IP68 stator
Voltage
230V 1Ph; 200/230, 460, 575V 3Ph
230V 1Ph; 200/230, 460, 575V 3Ph
208-230V or 460V 3Ph
Bearing B-10 life
30,000 h
30,000 h
100,000 h
Weight
250–260 lb
260–265 lb
430–606 lb
Models listed
22
22
10
Quick rule. Up to about 50 ft of total head and a 3 in force main: 3NC. Same duty but 3 in solids or a 4 in force main: 4NC. More than about 50 ft of head, more than about 550 GPM, or a long uphill force main: 4NCH. On single-phase power only the 3NC and 4NC apply.
Non-Clog Pump Performance
Franklin tabulated points only, in GPM at total dynamic head (static lift plus friction in the force main). A dash means no rated flow at that head; shut-off is the head at zero flow.
3NC curves by impeller trim4NC curves by impeller trim4NCH curves by horsepower
3NC, GPM at total dynamic head
Impeller
10 ft
20 ft
30 ft
40 ft
50 ft
Shut-off
160 mm (6.29 in)
360
220
75
—
—
35 ft
172 mm (6.77 in)
425
300
165
—
—
42 ft
184 mm (7.24 in)
480
385
270
125
—
50 ft
190 mm 1Ph / 196 mm 3Ph
555
470
355
235
95
58 ft
4NC, GPM at total dynamic head
Impeller
10 ft
20 ft
30 ft
40 ft
Shut-off
146 mm (5.74 in)
300
150
0
—
30 ft
160 mm (6.29 in)
380
240
100
—
36 ft
170 mm (6.69 in)
455
330
195
34
42 ft
176 mm 1Ph / 182 mm 3Ph
545
434
309
141
49 ft
4NCH, GPM at total dynamic head
Model HP
20 ft
40 ft
60 ft
70 ft
80 ft
90 ft
110 ft
7.5 HP
741
432
144
25
—
—
—
10 HP
948
609
293
150
21
—
—
12.5 HP
—
765
443
287
132
—
—
15 HP
—
918
618
463
295
109
—
20 HP
—
—
887
741
587
425
83
Source: FPS Wastewater Catalog M5276 (09-25). Two pumps of the same horsepower deliver very different flows at the same head depending on the impeller trim. Confirm the duty point against the factory curve before ordering.
Franklin NC vs A.Y. McDonald (Baker) and Grundfos
We supply all three brands’ wastewater pumps. The A.Y. McDonald and Grundfos figures below are from our own product pages for those lines; price positions are from our current prices.
Feature
Franklin FPS 3NC, 4NC, 4NCH
A.Y. McDonald sewage and grinder pumps
Grundfos Unilift AP35 and AP50
Pump type
Non-clog solids handling, semi-open impeller
Sewage pumps (solids handling); grinder pumps that macerate
Vortex impeller effluent and sewage pumps
Motor range
3–20 HP
Sewage 1/2–2 HP; grinder 1 and 2 HP
1 and 1.5 HP
Max flow
To 948 GPM
1/2 HP sewage to 109 GPM; grinder to 44 GPM
79–140 GPM
Max head
To 114 ft
1/2 HP sewage to 25 ft; grinder to 103 ft
39–49 ft
Solids
2.5 or 3 in spherical, passed whole
Sewage 2 in; grinder grinds up to 3 in
AP35 1.4 in; AP50 2.0 in
Discharge
3 or 4 in ANSI Class 125 flange
Sewage 2 in FNPT (1/2 HP); grinder 1-1/4 in vertical
Honest verdict. These pumps overlap less than their labels suggest. For a house, a small building or a septic effluent basin, the A.Y. McDonald sewage pumps and the Grundfos Unilift AP are the right tools: single-phase power, NPT discharge, a fraction of the price, and on the Grundfos an integral float so no panel is needed. For a pressure sewer, where a small, long force main runs uphill, the A.Y. McDonald grinder pump wins: it macerates the solids and pushes 44 GPM to 103 ft through a 1-1/4 in line. The Franklin NC Series wins everything above that: commercial and industrial lift stations that need 100 to 950 GPM, solids passed whole at 2.5 to 3 in, flanged 3 or 4 in force mains, three-phase power up to 575V, and a seal-fail probe that flags a leaking seal before the motor fails.
Which Wastewater Pump Do You Need?
Start from the job. We confirm the final model against the published curve before you order.
A lift station pump is sized on two numbers: the flow it must beat and the total dynamic head it must push against at that flow.
1. Peak inflow. The pump must move more than the highest flow arriving at the wet well. Estimate it from the fixtures or units served, or from the design flow the engineer or local authority sets for the site.
2. Total dynamic head (TDH). TDH = static lift (from the pump-off level to the highest point of the force main or the discharge) + friction loss in the force main, check valve and fittings at the design flow. Convert a pressure requirement to head at 2.31 ft per psi.
3. Pick the trim or horsepower. Read the TDH across the performance table and choose the smallest 3NC or 4NC trim, or 4NCH horsepower, that delivers more than the peak inflow there. Then check the solids, the discharge size against the force main, and the voltage.
4. Plan for two pumps. Most commercial lift stations run duplex, with two pumps alternating lead and lag from a duplex control panel so one can be serviced while the other runs.
Worked example. A small commercial lift station must handle a peak inflow of 300 GPM. The static lift is 15 ft and the force main loses 12 ft to friction at 300 GPM, so TDH = 15 + 12 = 27 ft. On the 3NC table, the 184 mm trim gives 385 GPM at 20 ft and 270 GPM at 30 ft, about 305 GPM at 27 ft — barely enough, with no margin. The 196 mm trim (5 HP, three phase) gives about 390 GPM at 27 ft, a comfortable margin. If the site wants 3 in solids or a 4 in force main, the 4NC 182 mm trim gives about 345 GPM at 27 ft. Run as a duplex, that is two 3NC-5 HP pumps and a duplex panel. We confirm the final pick where the system curve crosses the pump curve.
FPS NC Model and Part Numbers
Every model is on our listings by Franklin order number. The model code reads series, HP, voltage, phase and impeller trim: 3NC-523P3-196 is a 3NC, 5 HP, 230V, three phase, 196 mm.
3NC Series
Model
Order no.
HP
Voltage
FLA
3NC-323P1-160 / -172 / -184
87109898-01 / 87109897-01 / 87109896-01
3
230V 1Ph
19 / 22.5 / 25
3NC-323P3-160 / -172 / -184
87110359-01 / 87110358-01 / 87109899-01
3
200/230V 3Ph
13.5/12, 14.5/13.5, 16/15
3NC-346P3-160 / -172 / -184
87110362-01 / 87110361-01 / 87110360-01
3
460V 3Ph
6 / 6.5 / 7.5
3NC-357P3-160 / -172 / -184
87110365-01 / 87110364-01 / 87110363-01 (and -00, 30 ft cord)
Source: Franklin Electric price list (June 2026) and FPS Wastewater Catalog M5276. Where two FLA figures are shown they are at 200V / 230V. Cord is 50 ft unless noted.
Installation, Controls & Repair Parts
What goes in the wet well with the pump, and what keeps it running.
Control Panel
NC pumps run from a control panel with the starter and overload protection. Single-phase 3NC and 4NC need an FPS control panel or the NC-CK starter kit (520851). Use a panel with seal-fail circuitry to read the probe; duplex panels alternate lead and lag.
Lift-Out Rail Mounting
Base elbows let the pump be lifted out on a rail without entering the wet well: 3 in single-rail base elbow, flanged (87109916-00) or NPT (87109788-00), or bolt-on elbow (87109789-00). For 4 in pumps: base elbow FPSBEA400 (115930104), lift-out flange FPSPF400 (115930128) and lift-out kit FPSPK400 (115930131).
Dual SiC Seals and Seal-Fail Probe
Tandem silicon carbide seals, upper and lower, run in an oil bath with 300-series stainless hardware and NBR elastomers. A probe in the seal chamber signals the panel when water gets past the lower seal.
Adjustable Wear Plate
As the semi-open impeller and wear plate wear, the gap opens and flow drops. The field-adjustable wear plate closes the gap again, restoring performance without new parts.
Built to Be Rebuilt
Impellers by trim, seals, bearings, stators, rotors, cover assemblies and wear plates for the 3NC and 4NC are on our NC repair parts listing — 41 order numbers. 4NCH repair kits are available by horsepower on request.
Heavy-Duty Power Cable
4-conductor Type SOOW or SEOOW 600 V cable, 50 ft standard, with a cover assembly that can be replaced as a unit.
Common NC service part
Order no.
Fits
Mechanical seal
8720375102A
3NC and 4NC
Seal fail sensor kit
8730528101A
3NC and 4NC
Wear plate adjustment kit
8730531101A
3NC and 4NC
Wear plate, 3 in
8700224502A
3NC
Cover assembly, 50 ft cord
8730524104A
3NC and 4NC
Stator kit, 200/230V and 460V
8720362103A
3NC and 4NC 3Ph
Single-phase starter kit (NC-CK)
520851
3NC and 4NC 1Ph
Impeller order numbers: 3NC 8701539401A to 8701539405A (196 to 160 mm); 4NC 8701540403A to 8701540407A (182 to 146 mm). Match the trim to the last number of the pump model.
NC Series Catalogs & Manuals
Franklin Electric’s own literature for these pumps. Each opens as a PDF.
We read your peak inflow and TDH on the Franklin curve, pick the trim or horsepower, and send the submittal before you order.
Three Brands, One Answer
We supply Franklin Electric, A.Y. McDonald and Grundfos wastewater pumps. If a non-clog is more pump than the job needs, we will say so and quote the one that fits.
Account Terms Available
Net-30 for qualified contractor, property-management and municipal accounts.
Parts & Aftermarket
Seals, impellers, wear plates, stators and cover assemblies by Franklin order number for the pumps already in your stations.
Correct U.S. 60 Hz Build
230V single phase to 575V three phase, with the right cord length and rail hardware for the station.
Houston & Gulf Coast
Based in Houston and serving Gulf Coast contractors, property managers, plants and utilities.
Non-Clog Pump FAQ
The questions contractors and facility managers ask most.
What is a non-clog pump?
A non-clog, or solids-handling, pump is a submersible sewage pump with an open impeller and large passages that move raw wastewater with the solids intact. The Franklin FPS 3NC passes spherical solids up to 2.5 in, and the 4NC and 4NCH up to 3 in.
Which do I need: 3NC, 4NC or 4NCH?
Up to about 50 ft of head with a 3 in force main, the 3NC. The same duty with 3 in solids or a 4 in force main, the 4NC. Above about 50 ft of head or 550 GPM, or on a long uphill force main, the 4NCH, which is three phase only.
Non-clog or grinder pump?
A grinder pump macerates solids so it can push a small flow to a high head through a small pipe, which suits a pressure sewer. A non-clog pump passes solids whole at a much higher flow through a 3 or 4 in force main, which suits a gravity-fed lift station. The A.Y. McDonald grinder moves up to 44 GPM to 103 ft; the Franklin NC moves up to 948 GPM.
Do NC pumps need a control panel?
Yes. The pump runs from a control panel with the starter and overload protection. Single-phase 3NC and 4NC pumps need an FPS control panel or the 520851 starter kit for proper operation and warranty, and the seal-fail probe needs a panel with seal-fail circuitry.
Can I run a Franklin non-clog pump on single-phase power?
The 3NC and 4NC come in 230V single phase at 3 and 5 HP. The 4NCH is three phase only, in 208-230V or 460V. Three-phase 3NC and 4NC models are also available at 200/230V, 460V and 575V.
What warranty comes with the NC Series?
Franklin warrants the NC Series for 2 years from the date of original purchase by the consumer, per the owner’s manual. Single-phase models must run from an FPS control panel or starter kit to keep that warranty.
Franklin NC, A.Y. McDonald or Grundfos?
For a home, a small building or a septic basin, the A.Y. McDonald sewage pumps and Grundfos Unilift AP cost far less and run on single-phase power; the Grundfos has a built-in float. For a commercial or industrial lift station moving 100 to 950 GPM through a flanged force main, choose the Franklin NC Series. We supply all three.
Can the pump be lifted out on rails?
Yes. Franklin offers 3 in base elbows for the 3NC, and a 4 in base elbow, lift-out flange and lift-out kit for the 4NC and 4NCH, so the pump can be pulled for service without entering the wet well.
Can a worn NC pump be rebuilt?
Yes. Seals, impellers, bearings, stators, wear plates and cover assemblies for the 3NC and 4NC are listed by Franklin order number, and the adjustable wear plate restores lost flow as parts wear. 4NCH repair kits are available by horsepower.
What should I send for a quote?
The peak inflow in GPM, the static lift, the force main length, size and material, the solids expected, your voltage and phase, and whether the station is simplex or duplex. For a replacement, the pump nameplate and a photo of the wet well.
Sizing a Lift Station? Let’s Spec It.
Send the peak inflow, static lift and force main details. We return the matched Franklin NC pump, trim and rail hardware — or tell you if an A.Y. McDonald or Grundfos pump fits the job better.
Technical data on this page is taken from Franklin Electric U.S. 60 Hz product literature and, for other brands, from our product pages; it is subject to change by the manufacturer. Confirm against the current installation manual and pump curve before specifying. Franklin Electric and FPS are trademarks of Franklin Electric Co., Inc. A.Y. McDonald and Baker are trademarks of A.Y. McDonald Mfg. Co. Grundfos and Unilift are trademarks of Grundfos Holding A/S. All are used here for product identification only. Watermain Supply is a DBA of E4 Industrial LLC, an independent industrial supplier based in Houston, Texas.
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