Franklin Electric 50FH-125FH 6 in Tri Seal High Capacity Pump End
Franklin Electric 50FH 6 in Tri Seal High Capacity 50 GPM performance curve 1.5-15 HP
Franklin Electric 75FH 6 in Tri Seal High Capacity 75 GPM performance curve 3-25 HP
Franklin Electric 100FH 6 in Tri Seal High Capacity 100 GPM performance curve 5-25 HP
Franklin Electric 125FH 6 in Tri Seal High Capacity 125 GPM performance curve 5-40 HP
Franklin Electric 6in-8in-Submersible-Pump Owners Manual Photo
Franklin Electric 50FH-125FH 6 in Tri Seal High Capacity Pump End
Franklin Electric 50FH 6 in Tri Seal High Capacity 50 GPM performance curve 1.5-15 HP
Franklin Electric 75FH 6 in Tri Seal High Capacity 75 GPM performance curve 3-25 HP
Franklin Electric 100FH 6 in Tri Seal High Capacity 100 GPM performance curve 5-25 HP
Franklin Electric 125FH 6 in Tri Seal High Capacity 125 GPM performance curve 5-40 HP
Franklin Electric 6in-8in-Submersible-Pump Owners Manual Photo

Franklin Electric 6 in High Capacity Submersible Pump End - Stainless Steel, 50-125 GPM, 1.5-40 HP

HP: 1-1/2 HP
Model - Head: 50FH1S6-PE at 50 GPM

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$1,868.34
SKU: 93655003
Weight : 30.0 lb
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Description
Franklin Electric · Submersible Pump End
6 in High Capacity Submersible Pump End
28 Franklin builds, 50-125 GPM, 1-1/2 to 40 HP.
50-125 GPM Rated Flow · 1,390 ft Max Head
1-1/2 to 40 HP
Stainless Steel
5.50 in Dia x 12.9-50.4 in L
29-52 lb Weight
What Ships and What It Needs to Run

Included: the pump end only; no motor.

Motor required, ordered separately. A Franklin 4 in motor (2-wire, 3-wire single-phase or three-phase) or 6 in motor of the same horsepower; Franklin's modular motor bracket takes a 4 in or 6 in motor on 5-10 HP units, plus the motor control it needs (control box, starter or drive).

Drop cable and splice kit: sized to your setting depth and ordered separately.

Overview

The Tri-Seal High Capacity 6 in pump end covers flow ratings of 50, 75, 100 and 125 GPM with total dynamic head up to 1,400 ft, from 1-1/2 to 40 HP. A heavy-duty stainless steel 3 in NPT discharge head and a modular motor bracket that takes a 4 in or 6 in motor on 5-10 HP units. It replaces Franklin’s discontinued original FPS high-capacity models.

  • Heavy-duty stainless steel discharge head and motor bracket
  • Stainless steel shaft, shell, intake screen, and cable guard provides corrosion resistance and longer pump life
  • High flow hydraulic staging allows for maximum pump output, exceeds all energy efficiency standards, and provides increased product longevity
  • Glass-filled modified PPO impeller stage assemblies provide exceptional strength and durability
  • Ceramic shaft sleeve and rubber discharge bearing minimizes bearing wear and shaft misalignment
Genuine Franklin Electric equipment, factory-new in original packaging — sold and supported by Watermain Supply, an independent industrial supplier.
12-Month Franklin Electric Warranty

Covered by Franklin Electric’s Limited Warranty for 1 year from the date of original purchase.

Source: Franklin Electric 4 in and 6 in Submersible Pump Owner’s Manual (106467101).

Specifications
Nominal flow 50-125 GPM
Horsepower 1-1/2 to 40 HP
Frequency 60 Hz
Construction Stainless Steel
Models & Performance — Will It Do What You Need?

Find your horsepower in the row, then read across. Total head is the lift from the pumping water level, plus the pressure you want at the tank (2.31 ft for every PSI), plus friction in the drop pipe. The output tables give the flow you get at a 30/50 PSI pressure switch for your depth to water.

50 GPM class · 7 builds, 1-1/2 to 15 HP

50 GPM class — total head in feet

HP 0 GPM (Shut-off) 15 GPM 37 GPM 56 GPM 74 GPM (Max)
1-1/2 HP 158 155 128 90 46
2 HP 211 201 168 122 62
3 HP 263 254 215 158 84
5 HP 418 400 337 247 132
7-1/2 HP 591 559 475 354 188
10 HP 808 761 647 485 258
15 HP 1129 1065 900 655 333

Output in GPM at 30 PSI (switch cut-in), by depth to water, 1-1/2 HP to 5 HP

HP 20 ft 40 ft 60 ft 80 ft 100 ft 120 ft 140 ft
1-1/2 HP 56 46 37 21 — — —
2 HP 67 60 53 45 37 25 —
3 HP — 68 64 59 52 46 39
5 HP — — — — 69 66 63

Output in GPM at 50 PSI (switch cut-out), by depth to water, 1-1/2 HP to 5 HP

HP 20 ft 40 ft 60 ft 80 ft 100 ft 120 ft 140 ft
1-1/2 HP 33 — — — — — —
2 HP 51 42 34 20 — — —
3 HP 63 57 50 44 37 28 —
5 HP — 70 68 65 62 58 54

Output in GPM at 30 PSI (switch cut-in), by depth to water, 7-1/2 HP to 10 HP

HP 200 ft 250 ft 300 ft 350 ft 400 ft 450 ft 500 ft
7-1/2 HP 66 60 54 47 38 27 —
10 HP — 70 66 62 57 52 47

Output in GPM at 50 PSI (switch cut-out), by depth to water, 7-1/2 HP to 10 HP

HP 200 ft 250 ft 300 ft 350 ft 400 ft 450 ft 500 ft
7-1/2 HP 61 54 47 39 28 — —
10 HP 70 66 62 58 53 47 41
75 GPM class · 7 builds, 3 to 25 HP

75 GPM class — total head in feet

HP 0 GPM (Shut-off) 23 GPM 58 GPM 86 GPM 115 GPM (Max)
3 HP 162 161 144 106 47
5 HP 259 258 233 165 81
7-1/2 HP 387 384 337 241 122
10 HP 493 488 427 309 149
15 HP 727 725 650 474 245
20 HP 936 935 841 621 336
25 HP 1202 1194 1046 784 360

Output in GPM at 30 PSI (switch cut-in), by depth to water

HP 40 ft 80 ft 120 ft 160 ft 200 ft 300 ft 400 ft
3 HP 83 53 — — — — —
5 HP 104 92 76 63 — — —
7-1/2 HP — 107 99 89 78 40 —
10 HP — 115 107 101 94 73 39
15 HP — — — — 110 100 86
20 HP — — — — — 110 102
25 HP — — — — — 114 108

Output in GPM at 50 PSI (switch cut-out), by depth to water

HP 40 ft 80 ft 120 ft 160 ft 200 ft 300 ft 400 ft
3 HP 40 — — — — — —
5 HP 89 74 58 — — — —
7-1/2 HP 106 98 88 76 66 — —
10 HP 114 106 100 93 84 63 —
15 HP — — — 109 105 95 79
20 HP — — — — — 106 98
25 HP — — — — — 111 106
100 GPM class · 6 builds, 5 to 25 HP

100 GPM class — total head in feet (curves end at 129-159 GPM)

HP 0 GPM (Shut-off) 26 GPM 65 GPM 97 GPM 129 GPM
5 HP 216 201 166 137 94
7-1/2 HP 360 332 272 224 150
10 HP 433 403 330 267 177
15 HP 730 673 550 448 298
20 HP 886 825 675 553 368
25 HP 1170 1101 897 734 494

Output in GPM at 30 PSI (switch cut-in), by depth to water, 5 HP to 10 HP

HP 60 ft 80 ft 100 ft 120 ft 140 ft 160 ft 180 ft
5 HP 102 83 61 36 — — —
7-1/2 HP — — 121 112 102 92 80
10 HP — — 131 125 118 110 102

Output in GPM at 50 PSI (switch cut-out), by depth to water, 5 HP to 10 HP

HP 60 ft 80 ft 100 ft 120 ft 140 ft 160 ft 180 ft
5 HP 53 — — — — — —
7-1/2 HP 119 109 99 88 76 62 48
10 HP 129 123 115 108 100 91 81

Output in GPM at 30 PSI (switch cut-in), by depth to water, 15 HP to 25 HP

HP 360 ft 400 ft 440 ft 480 ft 500 ft 550 ft 600 ft
15 HP 99 88 76 64 57 40 —
20 HP 118 111 103 95 90 79 66
25 HP — 131 127 121 119 112 104

Output in GPM at 50 PSI (switch cut-out), by depth to water, 15 HP to 25 HP

HP 360 ft 400 ft 440 ft 480 ft 500 ft 550 ft 600 ft
15 HP 86 75 62 48 41 — —
20 HP 110 102 93 84 80 67 53
25 HP 131 126 121 115 112 105 97
125 GPM class · 8 builds, 5 to 40 HP

125 GPM class — total head in feet (curves end at 145-169 GPM)

HP 0 GPM (Shut-off) 29 GPM 73 GPM 109 GPM 145 GPM
5 HP 138 135 118 96 61
7-1/2 HP 273 258 223 175 104
10 HP 351 323 278 217 128
15 HP 559 518 445 347 197
20 HP 700 655 565 444 251
25 HP 906 843 729 574 324
30 HP 1112 1031 891 701 395
40 HP 1390 1287 1113 875 492

Output in GPM at 30 PSI (switch cut-in), by depth to water, 5 HP to 10 HP

HP 0 ft 20 ft 40 ft 60 ft 80 ft 100 ft 120 ft
5 HP 136 114 83 — — — —
7-1/2 HP — — 145 136 125 113 99
10 HP — — — 147 140 132 123

Output in GPM at 50 PSI (switch cut-out), by depth to water, 5 HP to 10 HP

HP 0 ft 20 ft 40 ft 60 ft 80 ft 100 ft 120 ft
5 HP 71 — — — — — —
7-1/2 HP 142 132 121 109 94 76 55
10 HP — 145 137 129 120 110 99

Output in GPM at 30 PSI (switch cut-in), by depth to water, 15 HP to 40 HP

HP 320 ft 360 ft 400 ft 440 ft 480 ft 500 ft 550 ft
15 HP 95 78 58 — — — —
20 HP 123 114 103 91 78 70 48
25 HP 141 135 129 122 115 111 101
30 HP 150 146 142 137 132 130 123
40 HP — — — 149 145 143 139

Output in GPM at 50 PSI (switch cut-out), by depth to water, 15 HP to 40 HP

HP 320 ft 360 ft 400 ft 440 ft 480 ft 500 ft 550 ft
15 HP 75 55 — — — — —
20 HP 112 102 90 76 60 50 —
25 HP 134 128 121 114 106 102 90
30 HP 146 141 136 132 126 124 116
40 HP — 151 148 145 141 139 134

Total head read from the published curves in Franklin’s FPS Submersible Catalog (Mi1007), pp. 17, 19, 21 and 23, digitized and rounded down to whole feet, at the plotted flows nearest 20%, 50% and 75% of where the curves end. 0 GPM is Franklin’s printed shut-off. Feet of head = PSI × 2.31. Output tables as printed in Mi1007, pp. 18, 20, 22 and 24-25, at the 30 and 50 PSI rows; Franklin rounds them to whole GPM. Drop-pipe friction is not included (manufacturer note). — marks a point Franklin does not print.

Franklin prints the 50 GPM 15 HP table in 20 PSI steps, so it has no 30 or 50 PSI row; the full table is in the catalog on the Data Sheet tab.

Best operating range: Franklin shades the best-efficiency range on each published curve and prints no figures for it. The curves are in the image gallery.

Before You Buy — The Limits That Decide the Fit
  • 6 in minimum well I.D.
  • 5 ft minimum submergence above inlet
  • 3 in discharge
  • 550 psi maximum working pressure
  • Maximum diameter across cable guard is 5.50 in on all models
Installation Notes
  • Install in a developed well; undeveloped water carries abrasives that wear the pump.
  • Set the pump at least 5 ft off the bottom of the well and above the well screen or casing perforations, unless cooling flow past the motor is assured.
  • Use positive-sealing check valves only, never swing type: one in-line within 25 ft of the pump below drawdown, and one every 200 ft of setting beyond 200 ft.

From the Franklin 4 in and 6 in submersible pump owner’s manual (106467101).

Applications

Agricultural, Industry, Residential, Municipal, Irrigation and Commercial.

Materials of Construction
Part Material
Impeller Glass-filled Modified PPO
Top Bowl Glass-filled Modified PPO
Pump Shaft 416 Stainless Steel
Shaft Coupling Stainless Steel
Discharge Bracket 303 Stainless Steel
Bearings, Discharge and Suction Ceramic
Suction Bracket 303 Stainless Steel
Suction Screen Stainless Steel
Cable Guard Stainless Steel
Eye/Hub Seal Polyurethane
For engineering-led sizing and selection support or a factory submittal, email sales@watermainsupply.com or call 1-888.510.4036.
© Watermain Supply — A division of E4 Industrial LLC
Data Sheet
6 in Tri-Seal High Capacity Catalog6 in Tri-Seal High Capacity Brochure4 in and 6 in Submersible Pump Owner's Manual6 in Tri-Seal High Capacity Section, FPS Submersible Catalog (Mi1007)
Videos

Product videos are being added to this listing. For a walkthrough in the meantime, email sales@watermainsupply.com.

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