Written by Amanda Casteel · COO Reviewed by Johnny Casteel · CEO · Master Plumber Updated July 2026 VA Plumbing Lic. 2710075081 · Contractor Lic. 2705180998
Quick answers
- Batteries: simple, automatic, limited runtime.
- Generators: longer runtime, more electrical infrastructure.
- Water-powered: no electricity, needs water pressure and drains water to work.
- Test whatever you buy — untested backups fail in the storm you care about.
When to use this guide
Finished basement, frequent storms, or you’re replacing a primary pump and want a real backup plan.
Decision factors
How long do your outages last? Is the basement finished? Do you already own a standby generator with transfer switch? An electrician sizes generator interconnects; we size pump and check-valve performance.
Also compare water-powered
See our battery vs water-powered sump comparison for the non-generator path.
Failure modes to avoid
Generator with no transfer plan
Backfeeding without a transfer switch is lethal to utility workers and illegal.
Proof & methodology
- · Written by Amanda Casteel (COO), Cherry Blossom Plumbing — family-owned Arlington plumbers serving Northern Virginia (VA Plumbing Lic. 2710075081).
- · Reviewed by Johnny Casteel (CEO · Master Plumber) against real NoVA service calls: rowhouses, hard-water pockets, polybutylene-era suburbs, and Arlington County / Fairfax County code patterns.
- · Electrical scopes require a licensed electrician. We teach homeowners how plumbing and power meet so you hire the right trade the first time.
Last updated July 2026
FAQs
Can you install both pump and generator?
We install pumps and discuss backup packages. Generator transfer equipment is electrician/generator contractor scope.
Next step
Ready for help in Arlington or Northern Virginia? We diagnose first, explain options in flat-rate terms, and never upsell what you do not need.