The building blocks behind the DAB submersible pumps. S4 pump ends run 5 to 90 GPM (0.5 to 10 HP) and fit any NEMA 4 in motor; Tesla water-filled motors come in 4 in (0.5 to 1.5 HP 2-wire, to 10 HP 3-wire) and 6 in (5.5 to 60 HP). Two-wire motors need no control box; three-wire single-phase motors use a matched 4CBUS or 6CBUS box, and CSA cable connector kits replace the lead. AISI 304 stainless, UL/CSA, VFD-ready 30 to 60 Hz, US 60 Hz. Buy to configure a pump or repair one in the field — call 1-888.510.4036 or email sales@watermainsupply.com for the right match.
DAB S4 4 in Submersible Well Pump End - Multi-Impeller Stainless Hydraulic End, NEMA 4 in Motor Fit
Price
From $196.92
DAB Submersible Motors, Pump Ends & Controls
DAB Pumps
DAB Submersible Motors, Pump Ends & Controls
S4 pump ends and Tesla 4 in and 6 in water-filled motors, matched control boxes and cable connector kits — the building blocks to configure a submersible pump to an exact duty point, or repair one in the field.
4 & 6 inNEMA fit
0.5–60 HPMotors
5–90 GPMPump ends
AISI 304Stainless
UL / CSAListed
Behind every DAB submersible well pump are the parts that make it: a hydraulic pump end, a water-filled Tesla motor sized to it, the control gear a three-wire motor needs, and the cable connector that ties the two together. Buying them as components lets a driller or installer configure a pump to an exact duty point, keep field spares on the truck, or repair a unit already in the ground without replacing the whole assembly.
Watermain Supply supplies the U.S. 60 Hz Tesla motor range and the full S4 pump-end family, with engineering-led selection support — give us the pump end, horsepower and service voltage and we confirm the motor, wiring and control box. Call 1-888.510.4036, or see the ready-to-drop complete pumps in the companion Submersible Well Pumps collection.
The Components
Six building blocks, all on standard NEMA interfaces, so they mix, match and replace cleanly.
S4 Pump Ends
4 in bare hydraulic end
5–90 GPMnominal flow
to 1500 fthead range
0.5–10 HPdesigned for
NEMA 4 inmotor fit
The S4 hydraulic end without a motor, in every nominal flow to 90 GPM. Stainless liner, shaft and coupling; technopolymer impellers on stainless adjustment rings; integrated removable non-return valve; NSF/ANSI 61.
Key specifications
1-1/4 in NPT (5–25 GPM); 2 in NPT (35–90 GPM)
Pairs with Tesla 4TW / 4GG or any NEMA 4 in motor
Sand-resistant hydraulics
Micro-cast AISI 304 supports
Best forCustom pump builds and field repairs where the motor is still good.
A 4 in NEMA two-wire asynchronous motor in AISI 304 stainless with the capacitor and thermal overload built into the motor casing — no external control box to wire or fail.
Key specifications
Capacitor and thermal protection internal
AISI 304L flanges and shell, canned stator
Kingsbury thrust bearing, water/glycol cooled
Removable CSA cable connector, 3x14 AWG
Best forThe simplest two-conductor install up to 1.5 HP.
A 4 in NEMA three-wire motor in AISI 304 stainless, single phase to 5 HP and three phase to 10 HP. Single-phase versions use a matched control box; the design gives easier field diagnosis and restart.
Key specifications
Single 0.5–5 HP; three-phase to 10 HP
Requires DAB Tesla control box on single phase
VFD-ready 30–60 Hz
Removable CSA cable connector, 4x14 AWG
Best forHigher-HP 4 in builds and installs wanting three-wire control.
A 6 in NEMA motor in AISI 304 stainless and cast iron, single phase 7.5 to 15 HP and three phase 5.5 to 60 HP, with a heavy-duty thrust bearing from 30 HP for deep-well axial load.
Key specifications
Standard 5.5–25 HP; heavy-duty 30–60 HP
DOL or star-delta start on three phase
PT100 temperature-sensor option
NSF, UL and CSA cable
Best forDeep-well and high-horsepower municipal, agricultural and industrial supply.
Metal-cased control boxes for the single-phase three-wire Tesla motors. The Plus version adds a magnetic line contactor matched to the motor, removing the need for an external contactor.
Key specifications
4CBUS for 4GG (0.5–5 HP)
6CBUS for 6GF (7.5–15 HP)
Run capacitor and, from 1.5 HP, resettable overload
Sized to exact motor HP and voltage
Best forEvery single-phase three-wire motor install, and control-box replacement.
The removable cable connector and lead as a complete CSA-certified assembly. A 3x14 AWG kit for the two-wire 4TW; 4x14 AWG kits for the three-wire 4GG in three lengths.
Key specifications
Swaps without pulling the motor apart
Cable certified to UL and CSA
Choose length by setting depth
4TW and 4GG kits are not interchangeable
Best forField repair of a damaged lead, and setting-depth changes.
The single decision that shapes the whole install. Get it right and the parts list follows.
Tesla 4TW (2-wire)
Tesla 4GG / 6GF (3-wire)
Conductors
Two plus ground
Three plus ground
Capacitor / overload
Inside the motor
In the control box (single phase)
Control box
Not required
Required on single phase
HP range
0.5 to 1.5 HP
0.5 to 60 HP
Field diagnosis
Replace at the well
Test and reset at the box
Three phase
Not applicable
460V options cut amp draw on long runs; user supplies overload
Rule: match the pump-end horsepower to the motor, and the control box to the motor horsepower and voltage exactly. Single-phase and three-phase units are not interchangeable, and the 4TW and 4GG cable connectors are not interchangeable.
Motor Selection
Pick the motor by diameter, wiring and horsepower; the control-box requirement follows the wiring.
Motor
Diameter
Wiring
HP range
Voltage
Control box
Tesla 4TW
4 in
2-wire
0.5 – 1.5 HP
115 / 230V
Not required
Tesla 4GG
4 in
3-wire
0.5 – 5 HP (1Ph); to 10 HP (3Ph)
230 / 460V
Required on single phase
Tesla 6GF
6 in
3-wire
5.5 – 60 HP
230 / 460V
Required on single phase (7.5–15 HP)
All Tesla motors are AISI 304 stainless with a Kingsbury thrust bearing, NSF / UL / CSA cable, and VFD operation from 30 to 60 Hz. 115V is 0.5 HP only.
S4 Pump Ends
The hydraulic end in every nominal flow from 5 to 90 GPM, for the motor of your choice.
Nominal flow
HP designed for
Discharge
Fits motor
5, 7, 10 GPM
0.5 – 3 HP
1-1/4 in NPT
NEMA 4 in
15, 20, 25 GPM
0.5 – 5 HP
1-1/4 in NPT
NEMA 4 in
35, 45 GPM
1 – 10 HP
2 in NPT
NEMA 4 in
60, 90 GPM
2 – 10 HP
2 in NPT
NEMA 4 in
Read the pump-end horsepower off the DAB curve for your duty point, then pick a Tesla motor at that HP, or any NEMA 4 in motor of matching horsepower and thrust rating.
Matching a Pump to Its Parts
Four steps from duty point to a complete, correctly wired pump.
1. Confirm the duty point. Flow and total dynamic head; read the pump-end horsepower off the DAB curve for that duty. 2. Pick the motor. That horsepower and NEMA diameter (4 in for S4). Two-wire for the simplest install to 1.5 HP, three-wire above that or where you want field diagnosis. 3. Add the control box only for single-phase three-wire motors, sized to the exact motor HP and voltage — Plus if you want the line contactor integral. 4. Match the cable connector to the motor family, and choose the lead length for your setting depth.
What Makes These Components Different
The engineering shared across the Tesla motors and S4 ends.
AISI 304 Stainless
Canned stator with AISI 304L flanges and shell; wetted parts protected against corrosion.
Kingsbury Thrust Bearing
Cooled and lubricated by a water and glycol mixture, built to carry axial load over a long service life.
NEMA Standard Fit
4 in and 6 in NEMA flanges pair with DAB pump ends, or any matching NEMA end from another brand.
VFD Ready
30 to 60 Hz operation on every Tesla motor, so a drive can hold constant pressure.
Built-In 2-Wire Protection
The 4TW carries its capacitor and overload internally — fewer parts to wire, fewer to fail.
Matched Control Boxes
Metal-cased 4CBUS and 6CBUS sized per horsepower; the Plus version adds an integral line contactor.
Removable Cable Connector
A CSA-certified lead swaps without pulling the motor apart, so a damaged cable is a field fix.
Field-Repair Friendly
Buy the exact end, motor, box or lead instead of a whole new pump when one part wears.
DAB vs Baker and Grundfos
We carry all three lines. Specifications are drawn from our own product listings; confirm the exact model against the manufacturer booklet.
Pump Ends & Motors — DAB vs A.Y. McDonald / Baker
Specification
DAB Tesla / S4
A.Y. McDonald / Baker
Origin
Imported (Italy)
US-built
Pump-end flow
5 to 90 GPM (4 in)
5 to 80 GPM (4 in); 90 to 1100 GPM (6/8/10 in)
Pump-end materials
Technopolymer + stainless
Silicon bronze, thermoplastic, or stainless (21000–26000)
Motor diameters / HP
4 in and 6 in, to 60 HP
4, 6, 7, 8, 10 in, to 250 HP
Availability at WMS
Sold and supported
Authorized, stocked A.Y. McDonald and Baker Water Systems distributor
Where Baker wins: a US-built line with the widest motor range (to 250 HP on 10 in), a full choice of pump-end material including silicon bronze for aggressive water, large-diameter ends for municipal and agricultural flow, and a range we stock and are authorized on. Where DAB wins: a simpler, lower-cost 4 in and 6 in package for standard wells, an integrated two-wire motor that needs no control box, and components built to drop straight onto a DAB pump end.
Motors, Protection & Controls — DAB vs Grundfos
Specification
DAB Tesla
Grundfos
Origin
Imported (Italy)
Imported (Denmark)
Motor range
4 in and 6 in, 0.5 to 60 HP
MS 4 in and larger MMS motors
Overload protection
Built into 2-wire motor; control box on 3-wire
MP 204 electronic motor protector option
Constant-pressure drive
VFD-ready 30–60 Hz
CUE variable frequency drive ecosystem
Positioning
Value, standard duty
Premium electronic protection and monitoring
Where Grundfos wins: a deeper electronic-protection and monitoring ecosystem — the MP 204 protector and CUE drives give current, voltage and dry-run protection with data logging for critical or hard-to-reach installations. Where DAB wins: a simpler, lower-cost motor-and-control package that covers standard duty, with an integrated two-wire option that removes the control box entirely. Both are imported; the choice is how much electronic protection the site justifies.
Why Source Pump Components From Watermain Supply
Engineering-Led Matching
Send the pump end, horsepower and voltage; we confirm the motor, control box and cable so the build is right the first time.
Everything On One Order
End, motor, control box and lead together, so the truck leaves complete instead of chasing a missing part.
Multi-Brand Perspective
We also supply A.Y. McDonald / Baker and Grundfos. If a DAB component is not the right fit, we will say so.
Correct US Build
60 Hz, US voltages, two-wire or three-wire specified right, with the matching control box.
Account Terms Available
Net-30 terms for qualified contractor, driller and municipal accounts, handled in-house.
Parts and Aftermarket
Genuine DAB components with HP and voltage cross-reference so you get the right motor, box or lead.
Frequently Asked Questions
Common questions from drillers, pump installers and engineers building or repairing a submersible pump.
Do I need a control box?
Only for single-phase three-wire motors (4GG, and 7.5 to 15 HP 6GF). Two-wire 4TW motors carry the capacitor and thermal overload inside the motor and need no box.
How do I match a pump end to a motor?
Match horsepower and NEMA diameter. A 1 HP S4 pump end takes a 1 HP 4 in motor, two-wire or three-wire. The Tesla flanges are standard NEMA, so they also fit other brands' NEMA ends.
Two-wire or three-wire?
Two-wire is the simplest install up to 1.5 HP. Three-wire suits higher horsepower and gives easier field diagnosis and restart, but needs a control box on single phase.
115V, 230V or 460V?
115V is 0.5 HP only. 230V covers most single-phase duty; 460V three phase suits larger horsepower and long cable runs and needs user-supplied overload protection.
Which cable connector kit?
A 3x14 AWG kit for the 4TW, a 4x14 AWG kit for the 4GG, in 6, 9 or 11 ft. They are not interchangeable.
Basic or Plus control box?
Plus contains a magnetic line contactor matched to the motor, removing the need for an external contactor. Basic is the capacitor-and-overload box.
Can I use a DAB motor on another brand pump end?
Yes — the Tesla motors use a standard NEMA 4 in or 6 in flange, so they fit any matching NEMA end. Confirm horsepower and thrust rating.
How does DAB motor protection compare to Grundfos?
Grundfos offers the MP 204 electronic protector and CUE drives for current, voltage and dry-run protection with data logging. DAB relies on built-in two-wire protection or a matched control box — simpler and lower cost for standard duty.
How does DAB compare to A.Y. McDonald / Baker?
Baker is US-built with the widest motor range to 250 HP and a full choice of pump-end material; DAB is a lower-cost 4 in and 6 in package for standard wells, and it is the line built to drop straight onto a DAB pump end.
Are the motors drinking-water rated?
The Tesla motors are UL and CSA listed; pair them with an NSF/ANSI 61 pump end for potable service.
Building or Repairing a Pump?
Tell us the pump end, the horsepower and your service voltage. We will confirm the motor, wiring and control box — or tell you if Grundfos or Baker is the better fit.
Technical data on this page is taken from DAB Pumps U.S. 60 Hz product literature and A.Y. McDonald and Grundfos product listings, and is subject to change by the manufacturer. Confirm against the current installation manual before specifying. DAB, Tesla and DAB Water Technology are trademarks of DAB Pumps S.p.A.; Grundfos, MS, MP 204 and CUE are trademarks of Grundfos Holding A/S; A.Y. McDonald and Baker Water Systems are trademarks of A.Y. McDonald Mfg. Co. and Baker Manufacturing Company — all 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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