Backflow Base / Every state / District of Columbia / Washington
Backflow testing software for Washington, District of Columbia.
For testing companies working Washington's 702,250 people: booking, routes, the field test, and the report to the water system.
Water systems based in Washington
- D.C. Water and Sewer Authority632,323 people served
- Joint Base Anacostia - Bolling20,411 people served
- Naval Station Washington - Wny16,800 people served
- Washington Aqueduct Division.0 people served
Households near Washington may be served by another system; Backflow Base matches each address to its own. All 4 in District of Columbia →
Water systems: EPA SDWIS, active community systems, 2026-10-19. Population: Census Bureau 2024 estimates.
Testing companies in Washington
125 companies on the tester lists of 1 water system. The first 25:
- A Tasker Inc, T/A Salco Mechanical Contractors
- A&E Plumbing Inc
- A&H Plumbing Inc
- A1-Flow
- Abduls Plumbing Service LLC
- Acker & Sons, Inc
- ADJ Sheetmetal Inc
- AH Jordan Plumbing & Mechanical
- Al Gleeson Electrical Co. Inc.
- All Mechanical and Plumbing LLC
- All Season Plumbing, Heating, and A/C, Inc.
- American Boiler, Inc.
- American Combustion Industries Inc
- Anytime Plumbing
- Apex Plumbing
- Ascendant Program Services, LLC
- Aspen Hill Plumbing LLC
- Backflow Services VA, LLC
- Backflow Technology, LLC
- Benjamin F. Gartrell Plumbing & Heating Inc
- Better Flow Backflow, LLC
- Bionic Plumbing and Heating
- Breeden Mechanical Design
- C.L. Hibbard Plumbing, Htg, A/C, Inc
- Capitol Boiler Works
From DC Water. Checked October 19, 2026. A list shows who may test, not who is good; ask the water system for its current list.
The software
- Bookings from a booking page, your own website, and an AI receptionist on your phone.
- Schedule board and route for each tester.
- Field app that scores every test, even with no signal.
- Test reports sent to the water system that serves each address.
- Card payments to your own Stripe account, and yearly renewals that charge after the test.
- Client portal for HOAs, property managers and contractors.
- $50/month flat: no per-test fee, no cut of payments.
- Every feature →What the app does, part by part.
- Compare →Next to other backflow and field-service software.
- Start free →No card. $50/month or $500/year once you go live, 45 days free.
- Free exam prep →Study questions, practice exams, device tests, a VR wet lab.