Basepump RB750 Water-Powered Backup Sump Pump
- Up to 15 gpm under rated conditions
- 15 ft maximum lift
- No electricity or battery: runs on municipal water pressure
- 85 dB high water alarm with float sensor
- Check valve, mounting hardware, alarm included
- 6 lb, 16 x 4 x 6 inches, polypropylene
Last refreshed Sep 8, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A water-powered backup sump pump that runs through power outages as long as city water flows. It needs municipal water pressure, so homes on a well without power are not covered.
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ASIN: B000GBUU7GModel: RB750Category: Sump Pumps
Overview
Finished basements on city water are where this Basepump backup earns its place. Household water pressure drives a venturi that pulls water out of the sump pit, so it runs during outages with no battery, and it mounts to the ceiling above the pit.
Backup that never needs a battery charged or replaced is the reason to install it. With no moving parts it runs quietly and needs little care. It uses city water to work, so flow depends on household pressure and the water bill rises while it runs.
Who it's for
Homeowners with municipal water and a primary sump pump who fear outages will gain dependable backup. Well-water homes need a battery backup instead, since the well pump stops without power.
Pros and cons
- No battery to maintain
- No moving parts
- Loud high water alarm included
- Ceiling mount clears radon covers
- Requires municipal water pressure
- Uses city water while pumping
- Plumbing codes may require a plumber
- Dedicated discharge line usually needed
Performance notes
Pumping rate rises and falls with household water pressure, so low-pressure homes see less flow. The venturi creates suction without moving parts, which is why it runs quietly and rarely wears. Undersized plumbing or restrictions cut performance, so pipe size matters at install.
Specifications
| Brand | Basepump |
|---|---|
| Model | RB750 |
| Dimensions & fit | |
| Maximum Lifting Height | 15 feet |
| Item Dimensions L X W X H | 16 x 4 x 6 inches |
| Item weight | 6 pounds |
| Capacity & performance | |
| Flow Rate | 15 gpm |
| Power & efficiency | |
| Power Source | Water pressure powered |
| Construction & materials | |
| Material Type | Polypropylene |
| Color | Black |
| Included components | |
| Included Components | Mounting hardware, check valve, water alarm |
| Unit Count | 1 Count |
| Other details | |
| Product Style | Backup sump pump, ceiling mounted |
| Alarm | 85 dB high water alarm with float sensor |
Frequently asked questions
Is the Basepump RB750 a primary sump pump?
No. It is a backup that takes over when the primary sump pump cannot operate, such as during a power outage.
Does the Basepump RB750 work on well water?
It runs on municipal water pressure. It operates during outages only while municipal water service remains available.
Does the Basepump RB750 need a battery?
No. No electricity, batteries, charger or generator is required.
Do I need a plumber to install the Basepump RB750?
Many homeowners install it themselves with the included instructions, but local plumbing codes may require a licensed plumber.