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Grundfos SP and SPE Submersible Pump Ends
Grundfos SPE 10 in Submersible Pump End
Grundfos
Grundfos SPE 10 in Submersible Pump End
- Price
- From $4,772.24
Grundfos SPE 8 in Submersible Pump End
Grundfos
Grundfos SPE 8 in Submersible Pump End
- Price
- From $2,802.32
Grundfos SPE 6 in Submersible Pump End
Grundfos
Grundfos SPE 6 in Submersible Pump End
- Price
- From $2,241.85
Grundfos 1100S SP 10 in Submersible Pump End
Grundfos
Grundfos 1100S SP 10 in Submersible Pump End
- Price
- From $5,389.94
Grundfos 800S SP 10 in Submersible Pump End
Grundfos
Grundfos 800S SP 10 in Submersible Pump End
- Price
- From $3,764.42
Grundfos 625S SP 10 in Submersible Pump End
Grundfos
Grundfos 625S SP 10 in Submersible Pump End
- Price
- From $3,013.68
Grundfos 300S SP 6 in Submersible Pump End
Grundfos
Grundfos 300S SP 6 in Submersible Pump End
- Price
- From $1,986.90
Grundfos 230S and 240S SP 6 in Submersible Pump End
Grundfos
Grundfos 230S and 240S SP 6 in Submersible Pump End
- Price
- From $2,479.35
Grundfos 160S SP 6 in Submersible Pump End
Grundfos
Grundfos 160S SP 6 in Submersible Pump End
- Price
- From $2,730.53
Grundfos 90S SP 6 in Submersible Pump End
Grundfos
Grundfos 90S SP 6 in Submersible Pump End
- Price
- From $1,298.83
Grundfos 77S SP 4 in Submersible Pump End
Grundfos
Grundfos 77S SP 4 in Submersible Pump End
- Price
- From $1,328.52
Grundfos 62S SP 4 in Submersible Pump End
Grundfos
Grundfos 62S SP 4 in Submersible Pump End
- Price
- From $1,297.31
Grundfos SP and SPE Submersible Pump Ends
Grundfos · Submersible Pump Ends
Grundfos SP and SPE
Grundfos SP and SPE
Submersible Pump Ends
Replacement and new-build Grundfos stainless steel pump ends for 4 in to 10 in wells, from the 5 GPM SP 5S to the 1,100 GPM SP 1100S, plus the SPE ends for Grundfos permanent magnet motors. Each pump end is matched to its motor by horsepower and size, with the head at rated flow shown wherever Grundfos publishes it and engineering-led selection on every order.
5-1,100 GPMRated flow
1/2-250 HPMotor horsepower
402Builds listed
AISI 304Stainless steel
24 MonthsGrundfos warranty
Grundfos SP pump ends are the hydraulic half of the Grundfos SP submersible: the stainless steel stages, check valve and inlet, without the motor. They rebuild a worn Grundfos SP on its existing motor, or pair with a new Grundfos MS or MMS motor for a new well. The series name is the rated flow: an SP 35S is rated at 35 GPM, an SP 625S at 625 GPM. SPE pump ends run on Grundfos 6 in permanent magnet motors and a CUE drive.
We supply the full SP 4 in, 6 in and 10 in ranges and the SPE 6, 8 and 10 in pump ends from the Grundfos 2026 price list, together with the Grundfos motors, control boxes and kits that complete the pump. Send us the old nameplate or the duty point and we will confirm the pump end and motor before you order. Call 1-888.510.4036. Genuine Grundfos equipment, factory-new in original packaging — sold and supported by Watermain Supply, an independent industrial supplier.
Submersible Well Pump Sizing CalculatorFlow, total head and the horsepower to look forGrundfos MS and MMS MotorsThe motors these pump ends run on
Will a Grundfos Pump End 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. The full terms are on the Data Sheet tab of every pump end.
Built to Last
Stainless steel stages, shaft and check valve, water-lubricated bearings with sand channels, and upthrust protection on every build, from a built-in stop ring or hydraulic balancing.
The Fit Limits
SP 4 in ends fit 4 in wells on a 4 in motor; from the 16S up, 7-1/2 HP and larger builds are also offered on 6 in motors for 6 in wells. SP 6 in ends need a 6 in well (8 in for builds on an 8 in motor); SP 10 in ends a 10 in well. Every pump end needs a motor of its horsepower, plus the motor’s control.
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: sales@watermainsupply.com · 1-888.510.4036
See Grundfos SP Pumps
Grundfos’s own videos: the new 6 in SP, and how an SP pump end comes apart and goes back together.
The Grundfos 6 in SP submersible pump
How to dismantle and assemble Grundfos SP pumps
Grundfos Pump End Families
Nineteen listings, one per flow class or well size. Pick the flow class, then the horsepower and model in the selector; the head at rated flow is in the model value wherever Grundfos publishes it.
SP 4 in Pump Ends
Domestic, farm and small system wells
5-77 GPMRated flow
1/2-25 HPHorsepower
127Builds
9Flow classes
Nine flow classes from the SP 5S to the SP 77S. Low-flow classes run on 4 in motors; from the 16S up, 7-1/2 HP and larger builds are offered on 6 in motors, and builds above 10 HP take a 6 in motor in a 6 in well.
- 1 in to 2 in NPT discharge by class
- Built-in check valve
- Motor, control box and lead ordered separately
- Fits Grundfos MS402, MS4000 and MS6000C motors
Best forRebuilding a Grundfos 4 in SP on its existing motor, and new 4 in wells from 5 to 77 GPM.
View SP 35S, or pick a class below
SP 6 in and 10 in Pump Ends
Irrigation, municipal and industrial wells
90-1,100 GPMRated flow
1-250 HPHorsepower
227Builds
3-6 inDischarge
SP 90S, 160S, 230S/240S and 300S for 6 in wells, and SP 625S, 800S and 1100S for 10 in wells. The motor size moves up with horsepower, from 4 in on the smallest 90S builds to 10 in on the largest 1100S.
- NPT discharge, 3 in to 6 in by series
- Built-in check valve
- Grundfos MS6000C and MMS motors by HP
- Head at rated flow from the Grundfos data booklet
Best forIrrigation districts, community water systems and industrial supply wells.
View SP 160S, or pick a class below
SPE Pump Ends
Variable-speed wells on a CUE drive
160-1,100 GPMRated flow
10-50 HPPM motor HP
48Builds
6, 8, 10 inWell size
Pump ends for Grundfos SPE pumps, built for the Grundfos 6 in permanent magnet motor and run on a CUE drive with a sine-wave filter. One listing per well size.
- Built-in check valve
- PM motor part number on every build
- Drive and filter ordered separately
- SPE 90S ends share part numbers with SP 90S
Best forReplacing the hydraulics on an existing Grundfos SPE installation.
View SPE 6 in
Every Grundfos Pump End Series
Head at rated flow is the range across the builds in each listing, from the Grundfos data booklet, rounded down. Read the build you need on its product page.
| Series | Rated flow | Horsepower | Motor size | Discharge | Head at rated flow |
|---|---|---|---|---|---|
| SP 5S | 5 GPM | 1/2-3 HP | 4 in | 1 in | 174-840 ft |
| SP 7S | 7 GPM | 1/2-2 HP | 4 in | 1 in | 151-610 ft |
| SP 10S | 10 GPM | 1/2-5 HP | 4 in | 1-1/4 in | 115-1,112 ft |
| SP 16S | 16 GPM | 1/2-10 HP | 4 in or 6 in | 1-1/4 in | 102-1,601 ft |
| SP 25S | 25 GPM | 1/2-10 HP | 4 in or 6 in | 1-1/2 in | 66-997 ft |
| SP 35S | 35 GPM | 3/4-20 HP | 4 in or 6 in | 1-1/2 in or 2 in | 61-1,440 ft |
| SP 45S | 45 GPM | 1-25 HP | 4 in or 6 in | 2 in | 69-1,555 ft |
| SP 62S | 62 GPM | 3/4-10 HP | 4 in or 6 in | 2 in | 40-518 ft |
| SP 77S | 77 GPM | 3/4-10 HP | 4 in or 6 in | 2 in | 35-404 ft |
| SP 90S | 90 GPM | 1-40 HP | 4 in to 8 in | 3 in | 42-1,690 ft |
| SP 160S | 160 GPM | 2-75 HP | 4 in to 8 in | 3 in | 39-1,584 ft |
| SP 230S and 240S | 230-240 GPM | 2-75 HP | 4 in to 8 in | 3 in or 4 in | 20-757 ft |
| SP 300S | 300 GPM | 3-75 HP | 4 in to 8 in | 3 in or 4 in | 29-760 ft |
| SP 625S | 625 GPM | 15-150 HP | 6 in to 8 in | 6 in | 76-696 ft |
| SP 800S | 800 GPM | 20-125 HP | 6 in to 8 in | 6 in | 72-479 ft |
| SP 1100S | 1,100 GPM | 30-250 HP | 6 in to 10 in | 6 in | 77-703 ft |
| SPE 6 in (160S, 230S, 240S, 300S) | 160-300 GPM | 10-50 HP | 6 in PM motor | 3 in or 4 in | 44-1,086 ft |
| SPE 8 in (385S, 475S) | 385-475 GPM | 10-50 HP | 6 in PM motor | 4 in or 6 in | 64-385 ft |
| SPE 10 in (625S, 800S, 1100S) | 625-1,100 GPM | 25-50 HP | 6 in PM motor | 6 in | 102-212 ft |
Sources: Grundfos 2026 US groundwater price list (part numbers, horsepower, motor size); Grundfos SP and SPE 60 Hz data booklets (head at rated flow); Grundfos Product Center (discharge). — = the booklet prints no head at rated flow for those builds (SP 230S; the 240S rows carry the range shown).
Quick rule. Choose the series by the flow you need, then the build whose head at rated flow covers your total head. The pump runs left on its curve at higher head and less flow, so a build a little above your total head holds the flow you need.
Grundfos vs DAB and A.Y. McDonald Pump Ends
We sell every line below, so we can be straight about fit. Specifications are taken from our own product pages for each brand.
4 in pump ends
| Specification | Grundfos SP 4 in | DAB S4 Pump End | A.Y. McDonald 26000 |
|---|---|---|---|
| Nominal flow classes | 5 to 77 GPM, 9 classes | 5 to 90 GPM | 5 to 70 GPM |
| Horsepower | 1/2-25 HP | 0.5-10 HP | 1/2-10 HP |
| Motor fit | 4 in; 6 in on 7-1/2 HP and larger builds from 16S | NEMA 4 in | 4 in |
| Impellers | Stainless steel | Technopolymer, sand resistant | All stainless steel |
| Check valve | Built in | Built in, technopolymer | Not stated on our page |
Verdict. Grundfos SP 4 in reaches the highest horsepower, to 25 HP on a 6 in motor, with stainless steel stages throughout. DAB S4 covers the widest flow span, to 90 GPM, with sand-resistant technopolymer impellers and NSF/ANSI 61 on its page. A.Y. McDonald 26000 is the all-stainless replacement end for 26000 Series pumps.
6 in to 10 in pump ends
| Specification | Grundfos SP 6 in and 10 in | A.Y. McDonald 6 in | A.Y. McDonald 8 in / 10 in |
|---|---|---|---|
| Flow classes | 90, 160, 230/240, 300 GPM (6 in); 625, 800, 1,100 GPM (10 in) | 90, 150, 230, 300 GPM | 400, 500 GPM (8 in); 650, 800, 1,100 GPM (10 in) |
| Horsepower | 1-75 HP (6 in); 15-250 HP (10 in) | 3-60 HP | 5-125 HP (8 in); 15-250 HP (10 in) |
| Construction | Stainless steel | Stainless steel | Stainless steel |
| 8 in wells | Complete SP 385S and 475S pumps; pump ends on request | — | 400 and 500 GPM pump ends |
| Variable speed option | SPE ends for PM motors and CUE drive | Not stated | Not stated |
Verdict. Grundfos covers more of the 6 in range at both ends, from 1 HP to 75 HP, adds the 240S and the SPE variable-speed ends, and our selector shows the head at rated flow on its builds. A.Y. McDonald lists 8 in pump ends at 400 and 500 GPM, where our Grundfos 8 in listings are complete pumps.
Which Grundfos Pump End Do You Need?
Typical selections. Demand figures are examples; send us the well data for an engineering-led selection.
| Application | Typical duty | Series | Notes |
|---|---|---|---|
| Home on a 4 in well | 5-16 GPM at 150-400 ft total head | SP 7S, 10S or 16S | Pair with the Grundfos 4 in motor of the build HP; 2-wire or 3-wire by your wiring. |
| Farm, livestock or small system | 25-45 GPM | SP 25S, 35S or 45S | Above 10 HP the build takes a 6 in motor and well. |
| Pivot or drip irrigation, 6 in well | 90-300 GPM | SP 90S to 300S | MS6000C motor by HP; three-phase starter or drive. |
| Community or municipal supply | 300-1,100 GPM | SP 300S, 625S, 800S, 1100S | 10 in well for the 625S and up. |
| Existing Grundfos SPE pump | Variable speed on CUE | SPE by well size | Keep the PM motor, CUE and filter; replace the hydraulics. |
Sizing a Pump End
Total head is what the pump must add: the lift from the pumping water level, the pressure you want at the tank, and the friction in the drop pipe.
Total head = pumping level + (pressure in PSI × 2.31) + drop-pipe friction.
Worked example. A home well with the pumping level at 180 ft, a 40/60 PSI pressure switch and 15 ft of friction in the drop pipe, needing 10 GPM. Total head at cut-out = 180 + 60 × 2.31 + 15 = 180 + 138.6 + 15 = 333.6 ft. Choose an SP 10S build whose head at 10 GPM is at least 334 ft, and pair it with the Grundfos 4 in motor of that build’s horsepower.
Then the motor. The pump end’s horsepower and motor size set the motor: browse the Grundfos MS and MMS motors. Single-phase 3-wire motors need a control box; three-phase motors need a starter or drive.
Check the well. Set the pump at least 3 ft below the maximum drawdown, never with the motor below the top of the screen or within 5 ft of the well bottom, and keep the cooling flow past the motor that Grundfos lists for it.
Run the Submersible Calculator for the total head and horsepower class, or send us the numbers.
What Makes an SP Pump End Last
From the Grundfos SP 60 Hz data booklet.
Stainless Steel
Standard SP pumps are AISI 304 (EN 1.4301) stainless steel; most series are also built in AISI 316 and 904L for aggressive water, available to order.
Sand Channels
All bearings are water-lubricated and have a squared shape, so any sand particles leave the pump with the pumped liquid.
Priming Screw
Grundfos 4 in pumps with radial impellers have a priming screw that keeps the bearings lubricated and prevents dry running at startup.
Upthrust Protection
A built-in stop ring or hydraulic balancing stops the chamber stack from rising at a low-pressure startup, protecting pump and motor.
Built-In Check Valve
Every SP pump end carries its own check valve in the valve casing, so the column stays full between starts.
Head on Every Build
Our selector shows the head at rated flow from the Grundfos booklet in the model value wherever Grundfos publishes it, so the build is chosen on the duty, not the stage count.
What Completes the Pump
A pump end runs on a Grundfos motor of its horsepower. These are the parts that go with it.
MS and MMS Motors
4 in and 6 in motors, 1/2 to 60 HP
3-Wire Control Box
For single-phase 3-wire motors, 1/2 to 15 HP
Nut and Bolt Kits
Pump-to-motor kits for 4 in, MS6000C and MMS6
MP 204 Motor Protector
Motor protection for the motor under the pump end
Genuine Grundfos parts, factory-new in original packaging.
Why Buy Grundfos Pump Ends from Watermain Supply
Engineering-Led Selection
Send the pumping level, flow, pressure and power. We check the pump end and motor against Grundfos’s published curves and electrical data before you order, and a factory submittal is available on request.
Multi-Brand Honesty
We also sell A.Y. McDonald, DAB and Franklin Electric submersibles. If a Grundfos build is not the right fit for the well, we will say so and quote the one that is.
Account Terms Available
Net-30 for qualified contractor, drilling, municipal and industrial accounts. PO and credit applications handled in-house.
Parts and Aftermarket
Control boxes, motor leads, nut and bolt kits and MP 204 motor protectors are listed alongside, matched by part number.
Complete Pumps on One Order
Pump end, Grundfos motor, control box, lead and nut and bolt kit, matched by part number, so the pump goes together at the well.
Houston and the Gulf Coast
Based in Houston, Texas, serving drillers, irrigation districts and industrial plants across the Gulf Coast and nationwide.
Frequently Asked Questions
Common questions from drillers, pump installers and well owners choosing a Grundfos pump end.
What warranty comes with a Grundfos pump end?
Grundfos covers its products for 24 months from the date of installation, but not more than 30 months from the date of manufacture, to the original user, under the limited warranty printed in the SP/SPE installation and operating instructions.
Does a pump end include the motor?
No. A pump end is the hydraulic section with its check valve. It needs a Grundfos motor of the same horsepower and size, plus the motor’s control box, starter or drive, drop cable and splice kit.
How do I read a Grundfos SP model number?
The series is the rated flow in GPM: a 35S is rated at 35 GPM. Our selector shows the head each build adds at that rated flow, so you choose the build by the total head you need.
Can I put a new pump end on my existing Grundfos motor?
Yes, where the horsepower and motor size match the pump end. Send us the motor nameplate and the old pump nameplate and we will confirm the replacement.
Which pump ends fit a 4 in well?
The SP 4 in pump ends from 5S to 77S on a 4 in motor. From the 16S up, builds above 10 HP, and the 6 in motor options at 7-1/2 and 10 HP, need a 6 in well; the selector shows the motor size on every build.
What is the difference between SP and SPE pump ends?
SP pump ends run on standard Grundfos MS and MMS induction motors. SPE pump ends run on Grundfos 6 in permanent magnet motors with a CUE drive and sine-wave filter, at variable speed.
Why is the 230S listed without a head figure?
The current Grundfos data booklet prints head values for the 240S, the newer version of the series, and not for the 230S. The 230S builds show their rated flow; ask us for the curve.
What total head do I need?
Add the pumping water level, the pressure you want at the tank times 2.31, and the friction in the drop pipe. The Submersible Calculator does the arithmetic.
How do Grundfos pump ends compare with DAB and A.Y. McDonald?
Grundfos SP 4 in reaches 25 HP with stainless stages; DAB S4 runs to 90 GPM with sand-resistant technopolymer impellers. In 6 in, Grundfos runs from 1 to 75 HP and adds SPE variable-speed ends; A.Y. McDonald lists 8 in pump ends.
Ready to Match Your Pump End?
Send the old nameplate, or the flow, pumping level and pressure you need, with the well size and the power at the well. We will reply with the pump end, the motor and the parts that complete the pump.
Technical data on this page is taken from Grundfos product literature (2026 US groundwater price list, SP 60 Hz data booklet, SP/SPE installation and operating instructions and Grundfos Product Center) and is subject to change by the manufacturer. Confirm against the current installation manual before specifying.
Grundfos, SP, SPE, MS, MMS, CUE and MP 204 are trademarks of Grundfos Holding A/S; DAB is a trademark of DAB Pumps S.p.A.; A.Y. McDonald is a trademark of A.Y. McDonald Mfg. Co. 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.
Grundfos, SP, SPE, MS, MMS, CUE and MP 204 are trademarks of Grundfos Holding A/S; DAB is a trademark of DAB Pumps S.p.A.; A.Y. McDonald is a trademark of A.Y. McDonald Mfg. Co. 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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