Are You confused? If You need help selecting the best backup sump pump for Your specific basement, just follow the process in the yellow box and feel free to call or e-mail Basementsaver with questions.
To determine the optimum backup sump pump size for Your basement, we need to estimate the maximum water flow into Your sump pit:
Backup Sump Pump Selector Summary - Facts Determined So Far
An unrestricted city water supply can be made available:
NEXT - Continue Using the Basementsaver Backup Sump Pump Selection Tool to find the best backup sump pump model for Your specific basement:
Step 2 - Estimate The Maximum Amount Of Water You Need To Remove
Determine your sump pit peak water flow rate by accurately measuring the water rise in 60 seconds (How?):
Basementsaver Backup Sump Pump Selector Step 2. - About Your Basement Sump Pit Flow
Your Sump Pit Flow
If You experience Low - Normal Water Flow In Your Residential Sump Pit (Less Than 800 gph At Peak Flow) click this button:
If You experience Normal - High Water Flow In Your Residential Sump Pit (800 - 1,100 gph At Peak Flow) click this button:
If You have Very High Water Flow In Your Residential/Commercial Sump Pit (1,100 - 1,600 gph At Peak Flow) click this button:
If You have Extreme Water Flow In Your Residential/Commercial Sump Pit (Over 1,600 gph At Peak Flow) click this button:
How Can I Measure My Sump Pit Flow Rate Accurately?
To accurately determine Your sump pit flow rate you will need a tape measure and a watch that indicates seconds:
Measure the diameter of Your sump pit and note it down.
At a time of high water flow (when Your primary sump pump is cycling regularly), allow Your sump pump to drain Your sump pit to a level just above the top of the pump, and then turn off the pump.
Extend Your tape measure in your sump pit and lock it off with the "0 inch" end of the tape touching the water surface.
Observe the water level and note the amount of tape measure scale covered by water after exactly 60 seconds.
Make Sure You Turn Your Primary Sump Pump Back On!
Repeat 3 times at different times of high flow, and use the longest distance covered (highest water flow rate) to find Your maximum sump pit flow rate in gallons per hour (gph) by using the table below.
Use this information to click the most appropriate button in the yellow box above.
Sump Pit Water Flow Rates (gph)
Inches Of Water Rise In 60 Seconds
Sump Pit Diameter
2 in
4 in
6 in
8 in
10 in
12 in
14 in
16 in
18 in
16 in
104
209
313
418
522
627
731
836
940
18 in
132
264
397
529
661
793
925
1,058
1,190
20 in
163
326
490
653
816
979
1,143
1,306
1,469
22 in
197
395
592
790
987
1,185
1,382
1,580
1,777
24 in
235
470
705
940
1,175
1,410
1,645
1,880
2,115
Sump Flow Range:
Residential 1
Residential 2
Commercial 1
Commercial 2
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