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Grundfos SP and SPE 6 in and Larger Submersible Well Pumps
Grundfos SPE 10 in Submersible Well Pump
Grundfos
Grundfos SPE 10 in Submersible Well Pump
- Price
- From $13,310.64
Grundfos SPE 8 in Submersible Well Pump
Grundfos
Grundfos SPE 8 in Submersible Well Pump
- Price
- From $8,080.89
Grundfos SPE 6 in Submersible Well Pump
Grundfos
Grundfos SPE 6 in Submersible Well Pump
- Price
- From $7,190.25
Grundfos 1100S SP 10 in Submersible Well Pump
Grundfos
Grundfos 1100S SP 10 in Submersible Well Pump
- Price
- From $11,884.28
Grundfos 800S SP 10 in Submersible Well Pump
Grundfos
Grundfos 800S SP 10 in Submersible Well Pump
- Price
- From $8,698.93
Grundfos 625S SP 10 in Submersible Well Pump
Grundfos
Grundfos 625S SP 10 in Submersible Well Pump
- Price
- From $7,048.79
Grundfos 475S SP 8 in Submersible Well Pump
Grundfos
Grundfos 475S SP 8 in Submersible Well Pump
- Price
- From $5,654.28
Grundfos 385S SP 8 in Submersible Well Pump
Grundfos
Grundfos 385S SP 8 in Submersible Well Pump
- Price
- From $5,875.13
Grundfos 300S SP 6 in Submersible Well Pump
Grundfos
Grundfos 300S SP 6 in Submersible Well Pump
- Price
- From $3,092.84
Grundfos 240S SP 6 in Submersible Well Pump
Grundfos
Grundfos 240S SP 6 in Submersible Well Pump
- Price
- From $3,111.31
Grundfos 230S SP 6 in Submersible Well Pump
Grundfos
Grundfos 230S SP 6 in Submersible Well Pump
- Price
- From $3,096.86
Grundfos 160S SP 6 in Submersible Well Pump
Grundfos
Grundfos 160S SP 6 in Submersible Well Pump
- Price
- From $3,445.81
Grundfos SP and SPE 6 in and Larger Submersible Well Pumps
Grundfos · Groundwater
Grundfos SP and SPE 6 in and Larger Submersible Well Pumps
Complete Grundfos stainless steel submersibles for 6, 8 and 10 in wells: the SP 90S to SP 1100S on Grundfos MS and MMS motors, and the variable-speed SPE on a permanent magnet motor. Built for irrigation, community water systems and industrial supply wells, with the head at rated flow on every build and engineering-led selection on every order.
90–1,100GPM rated flow
1–250HP
6, 8, 10 inWells
363Builds listed
24 MonthsGrundfos warranty
Grundfos SP 6 in and larger pumps are complete submersibles: a stainless steel SP pump end assembled with a Grundfos motor of the right horsepower and diameter, under one part number. The series name is the rated flow, so an SP 300S is rated at 300 GPM and an SP 1100S at 1,100 GPM. The SPE versions run the same hydraulics on a Grundfos 6 in permanent magnet motor and a CUE drive, so the pump speeds up and slows down with demand.
We supply thirteen series from the Grundfos 2026 US price list, in single-phase builds to 5 HP and three-phase 230 V and 460 V builds to 250 HP, together with the control boxes, drives, motor protection and leads that complete the installation. Send the well log or the duty point and we will confirm the series, build and motor before you order. Call 1-888.510.4036 or email sales@watermainsupply.com. Genuine Grundfos equipment, factory-new in original packaging — sold and supported by Watermain Supply, an independent industrial supplier.
Will a Grundfos Large Submersible Work for Your Well?
The four questions drillers and owners ask first, answered from Grundfos’s published data.
24-Month Warranty
Covered for 24 months from the date of installation, but not more than 30 months from the date of manufacture, under Grundfos’s limited warranty in the SP/SPE installation and operating instructions. Three-phase motors need three-leg ambient-compensated quick-trip overload protection for the warranty to apply.
Built to Last
AISI 304 stainless steel stages, shaft and check valve, water-lubricated bearings with sand channels, and upthrust protection on every build. The motor is matched to the pump end at the factory.
The Fit Limits
SP 90S to 300S fit a 6 in well; builds on an 8 in motor need an 8 in well. SP 385S and 475S need an 8 in well, and SP 625S, 800S and 1100S a 10 in well. Single-phase stops at 5 HP; every larger build is three-phase, and every SPE build is 460 V three-phase.
Size It Now
Enter the pumping level, flow and pressure; the calculator returns the total head and the horsepower class to look for. Or send the numbers to sales@watermainsupply.com · 1-888.510.4036.
Run the CalculatorThree Grundfos Large Submersible Lines
Thirteen listings, one per series or well size. Pick the series, then the horsepower, voltage and model in the selector; the head at rated flow is in the model value.
SP 6 in Well Pumps
5 series · 90S, 160S, 230S, 240S, 300S
90–300GPM
1–75HP
4–8 inMotor
1Ph/3PhSupply
The workhorse range for 6 in wells, from a 1 HP 90S to a 75 HP 160S. Small builds run on a 4 in motor, mid builds on a 6 in motor, and the deepest 90S and 160S builds on an 8 in motor.
- Single-phase 230 V 3-wire builds to 5 HP
- Three-phase 230 V and 460 V
- Head at rated flow to 1,690 ft (90S)
Best for Irrigation, ranches, schools and community water systems.
View SP 160S
SP 8 in and 10 in Well Pumps
5 series · 385S, 475S, 625S, 800S, 1100S
385–1,100GPM
7-1/2–250HP
6–10 inMotor
3PhSupply
High-flow pumps for 8 in and 10 in wells. The 385S and 475S suit 8 in casing; the 625S, 800S and 1100S suit 10 in casing, with the 1100S reaching 250 HP on a 10 in motor.
- Three-phase 230 V and 460 V
- 6 in motors to 40 HP; 8 in and 10 in on the 1100S
- Head at rated flow to 703 ft (1100S)
Best for Center pivots, irrigation districts and municipal production wells.
View SP 800S
SPE Variable-Speed Pumps
3 listings · 6, 8 and 10 in wells
90–1,100GPM
10–50HP
6 in PMMotor
460V3Ph
The SP hydraulics on a Grundfos 6 in permanent magnet motor, run by a CUE drive with a sine-wave filter. Speed follows demand, so one pump covers a wide flow band and holds a set pressure.
- Same flow classes as SP, 90S to 1100S
- Drive and filter ordered separately
- Head at rated flow to 1,818 ft (SPE 90S)
Best for Wells with changing demand and constant-pressure systems.
View SPE 6 in
Every Grundfos Large Submersible Series
Head at rated flow is the range across the builds in each listing, from the Grundfos 60 Hz data booklets. Read the build you need on its product page.
| Series | Rated flow | Horsepower | Motor | Supply | Minimum well | Head at rated flow | Builds |
|---|---|---|---|---|---|---|---|
| SP 90S | 90 GPM | 1–40 HP | 4, 6, 8 in | 1Ph, 3Ph | 6 in (8 in on 8 in motor) | 42–1,690 ft | 62 |
| SP 160S | 160 GPM | 2–75 HP | 4, 6, 8 in | 1Ph, 3Ph | 6 in (8 in on 8 in motor) | 39–1,584 ft | 47 |
| SP 230S | 242 GPM | 2–40 HP | 4, 6 in | 1Ph, 3Ph | 6 in | 23–525 ft | 50 |
| SP 240S | 240 GPM | 2–50 HP | 4, 6 in | 1Ph, 3Ph | 6 in | 21–557 ft | 40 |
| SP 300S | 300 GPM | 3–40 HP | 4, 6 in | 1Ph, 3Ph | 6 in | 29–409 ft | 40 |
| SP 385S | 385 GPM | 7-1/2–40 HP | 6 in | 3Ph | 8 in | 60–347 ft | 18 |
| SP 475S | 475 GPM | 7-1/2–40 HP | 6 in | 3Ph | 8 in | 51–284 ft | 16 |
| SP 625S | 625 GPM | 15–40 HP | 6 in | 3Ph | 10 in | 76–203 ft | 8 |
| SP 800S | 800 GPM | 20–40 HP | 6 in | 3Ph | 10 in | 72–143 ft | 5 |
| SP 1100S | 1,100 GPM | 30–250 HP | 6, 8, 10 in | 3Ph | 10 in | 77–703 ft | 16 |
| SPE 6 in | 90–300 GPM | 10–50 HP | 6 in PM | 460V 3Ph | 6 in | 44–1,818 ft | 46 |
| SPE 8 in | 385–475 GPM | 10–50 HP | 6 in PM | 460V 3Ph | 8 in | 64–385 ft | 11 |
| SPE 10 in | 625–1,100 GPM | 25–50 HP | 6 in PM | 460V 3Ph | 10 in | 102–212 ft | 4 |
Sources: Grundfos 2026 US groundwater price list (part numbers, horsepower, motor size, voltage); Grundfos SP and SPE 60 Hz data booklets (head at rated flow). The SPE 230S builds carry no head at rated flow in the booklet and are excluded from the SPE 6 in range.
Quick rule. Choose the series by the flow you need and the casing you have, then the build whose head at rated flow covers your total head. A build a little above your total head holds your flow as the well draws down.
Grundfos vs Franklin Electric and A.Y. McDonald for 6 in and Larger Wells
We sell every line below, so we can be straight about fit. Specifications are taken from our own product pages for each brand.
| Specification | Grundfos SP and SPE | Franklin Electric SR, SSI, STS | A.Y. McDonald 6, 8, 10 in |
|---|---|---|---|
| How it is sold | Complete pump: pump end and motor under one part number | Pump end; motor ordered separately | Pump end; motor ordered separately |
| Flow classes | 90–300 GPM (6 in), 385–475 (8 in), 625–1,100 (10 in) | 70–325 GPM SR and 85–300 SSI (6 in); 400–475 (8 in); 550–1,150 SSI (10 in); STS to 1,200 | 90–300 GPM (6 in); 400, 500 (8 in); 650–1,100 (10 in) |
| Horsepower | 1–250 HP | 5–150 HP SR; to 250 HP SSI | 3–60 HP (6 in); 5–125 HP (8 in); 15–250 HP (10 in) |
| Construction | AISI 304 stainless steel | Stainless SR and SSI; 316 SS SR; ductile iron STS | Stainless steel |
| Variable speed | SPE on a PM motor and CUE drive | MagForce PM motor and drive, 7-1/2–60 HP | Not stated on our pages |
| Warranty | 24 months from installation, max 30 from manufacture | 1 year from installation or 2 from manufacture | See listing |
| Shop | Grundfos 300S SP | Franklin 6 in SR | A.Y. McDonald 300S |
Verdict. Grundfos is the one line here sold as a complete pump, which saves matching a motor and carries the longest warranty term of the three. Franklin wins on sandy and corrosive water, with ductile iron STS turbines to 1,200 GPM and a 316 SS SR range. A.Y. McDonald lists a 500 GPM pump end for 8 in wells, above the Grundfos 475S, and matching Baker motors to 10 in.
Which Grundfos Large Submersible Do You Need?
Typical selections. Demand figures are examples; send us the well data for an engineering-led selection.
| Application | Typical duty | Series | Notes |
|---|---|---|---|
| Deep stock or ranch well | 60–90 GPM at 400–1,500 ft | SP 90S | The deepest-lifting series; 8 in motor on the top builds |
| School, campus or small community system | 120–250 GPM at 200–600 ft | SP 160S, 230S, 240S | Pair with a hydro-pneumatic tank or a CUE drive |
| Pivot or drip irrigation, 6 in well | 250–300 GPM at 150–400 ft | SP 300S | Single-phase available to 5 HP; most jobs run three-phase |
| Irrigation, 8 in well | 350–475 GPM at 100–350 ft | SP 385S, 475S | 6 in motor inside 8 in casing; check shroud and cooling flow |
| Municipal or district production well | 600–1,100 GPM at 100–700 ft | SP 625S, 800S, 1100S | 1100S to 250 HP on an 8 in or 10 in motor |
| Demand that swings through the day | Any of the above, variable flow | SPE 6, 8 or 10 in | Constant pressure from one pump; CUE drive and sine-wave filter required |
How to Size a 6 in and Larger Submersible
Flow first, then total dynamic head, then the build.
1. Flow. For irrigation, take the system design flow (sprinkler package or emitter count). For a water system, take peak demand from the system engineer. The series is the nearest rated flow at or above it.
2. Total dynamic head (TDH) = pumping water level + rise from the well head to the discharge point + discharge pressure × 2.31 + friction in the drop pipe and line. Use the pumping level under drawdown, not the static level.
3. Build. Pick the build whose head at rated flow is at or just above your TDH, then confirm the casing fits the motor diameter and the supply matches the voltage.
Worked example. A center pivot needs 300 GPM at 50 PSI. Pumping level 180 ft, 10 ft rise to the pivot, 20 ft friction. TDH = 180 + 10 + 50 × 2.31 + 20 = 325.5 ft. The SP 300S300-8 gives 321–324 ft at 300 GPM, just short; the SP 300S300-9B gives 343–346 ft at 300 GPM on a 30 HP 6 in motor and covers it with margin.
Submersible Well Pump Sizing CalculatorTotal head and the horsepower class to look for
What Makes a Grundfos SP Last
From the Grundfos SP and SPE data booklets.
Stainless Throughout
Stages, shaft, check valve, inlet and sleeve in AISI 304 stainless steel, for long life and resistance to aggressive water.
Sand Handling
Water-lubricated bearings with sand channels carry abrasive particles out of the bearing path instead of grinding them in.
Upthrust Protection
A built-in stop ring or hydraulic balancing protects the pump at start-up, when the flow is highest and the head lowest.
Built-In Check Valve
A spring-loaded check valve in the discharge holds the column and prevents back-spin when the pump stops.
Motor Matched at the Factory
Complete pumps ship with a Grundfos MS or MMS motor of the right horsepower and diameter, so the coupling and thrust rating are correct from day one.
Variable Speed Option
SPE pumps run on a Grundfos permanent magnet motor and CUE drive, holding constant pressure across a wide flow band from one pump.
What Completes the Installation
A complete pump includes the pump end and motor. These are ordered separately.
SA-SPM6 Control Box
Starts single-phase 3-wire builds
MP 204 Motor Protector
Three-phase protection and monitoring
CUE Drive
Runs SPE pumps and constant pressure
Sine-Wave Filter
Required between the CUE and an SPE motor
Motor Leads
Replacement leads by motor size
SP and SPE Pump Ends
Rebuild on an existing motor
MS and MMS Motors
Replacement motors by HP
Genuine Grundfos parts keep the motor warranty conditions intact. Send the pump nameplate and we will confirm each part number.
Why Buy From Watermain Supply
Engineering-led sizing
Send the well log, flow and pressure. We work the total dynamic head, pick the build and check the casing, voltage and motor before you order.
Straight answers across brands
We also supply Franklin Electric and A.Y. McDonald for large wells. If Grundfos is not the right fit for the well, we will say so and show you what is.
Account terms
Contractor, driller, irrigation and municipal accounts on approved credit. Ask us to set one up.
Parts and aftermarket
Pump ends, motors, leads, control boxes, drives and motor protection are listed alongside the pumps.
Correct US build
Every listing is the US 60 Hz build with NPT discharge and the part number from the Grundfos 2026 US price list.
Houston based, Gulf Coast service
We size, quote and support from Houston for drillers, growers, contractors and utilities.
Frequently Asked Questions
What warranty comes with a Grundfos SP or SPE pump?
Grundfos covers these pumps for 24 months from the date of installation, but not more than 30 months from the date of manufacture, under Grundfos’s limited warranty in the SP/SPE installation and operating instructions. On three-phase motors the warranty requires three-leg ambient-compensated quick-trip overload protection.
What ships with a complete pump, and what else do I need?
The pump end assembled to a Grundfos motor of the listed horsepower and diameter. Single-phase builds also need an SA-SPM6 control box; three-phase builds need a starter or drive with quick-trip overloads, and an MP 204 adds monitoring. SPE pumps need a CUE drive and a sine-wave filter. Drop pipe, cable and the pitless or discharge head are by others.
Can I run one on single-phase power?
Yes, the SP 90S to 300S come in 230 V single-phase 3-wire builds up to 5 HP. Every larger build, and every SPE, is three-phase.
What is the difference between SP and SPE?
SP runs at fixed speed on an induction motor. SPE uses the same hydraulics on a permanent magnet motor and CUE drive, so the speed changes with demand and the pump can hold a constant pressure.
What size well do I need?
SP 90S to 300S fit a 6 in well, or an 8 in well on builds with an 8 in motor. SP 385S and 475S need an 8 in well; SP 625S, 800S and 1100S a 10 in well. Confirm the casing inside diameter and any crooked sections with us before ordering.
How do I size the pump?
Work out flow and total dynamic head: pumping level, rise to the discharge, pressure × 2.31 and friction. Then pick the build whose head at rated flow is at or just above that number. The Submersible Calculator does the math.
Can I replace only the pump end or the motor?
Yes. The SP and SPE pump ends and the MS and MMS motors have their own listings, matched by horsepower and diameter.
Will you help select the pump?
Yes. Send the well log, pumping level, flow and pressure to sales@watermainsupply.com or call 1-888.510.4036 and we will confirm the build, motor and controls.
Ready to Size Your Well?
Send the well log, the flow and the pressure you need. We will match the series, build, motor and controls.
Technical data on this page is taken from Grundfos product literature and is subject to change by the manufacturer. Confirm against the current installation manual before specifying.
Grundfos, SP, SPE, MS, MMS, CUE, MP 204 and SQE are trademarks of Grundfos Holding A/S. Franklin Electric and MagForce are trademarks of Franklin Electric Co., Inc. A.Y. McDonald and Baker are trademarks of A.Y. McDonald Mfg. Co., 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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