Backflow Base / Every state / Hawaii / Honolulu
Backflow testing software for Honolulu, Hawaii.
For testing companies working Honolulu's 345,510 people: booking, routes, the field test, and the report to the water system.
Water systems based in Honolulu
- Hnl-Windward-Pearl Harbor631,389 people served
- Waipahu-Ewa-Waianae217,479 people served
- Mililani50,573 people served
- Wahiawa23,348 people served
- Waipio Heights11,516 people served
Plus 10 smaller systems based here. Households near Honolulu may be served by another system; Backflow Base matches each address to its own. All 117 in Hawaii →
Water systems: EPA SDWIS, active community systems, 2026-10-19. Population: Census Bureau 2024 estimates.
Testing companies in Honolulu
56 companies on the tester lists of 1 water system. The first 25:
- 1A1A Backflow Testing
- 808 Backflow Testing LLC
- 808 Plumbing Services
- A-1 Budget Plumbiung
- A.G. Repair LLC
- Action Plumbing
- Aina 1 Plumbing
- Alaka’i Mechanical Corp.
- Aqua Engineers
- Backflow Testing Hawaii LLC
- Big Island Backflow Testing LLC
- CJ Plumbing
- Commercial Plumbing
- Continental Mechanical
- Cubellis Plumbing LLC
- Doonwood Engineering
- Dorvin D. Leis Co, Inc.
- Economy Plumbing & Sheet Metal Inc.
- Evertrust Plumbing LLC
- Furuta Plumbing LLC
- Gordon Mechanical LLC
- Hako Plumbing, Inc.
- Hawaii Island Backflow Testing LLC
- Hawaii Plumbing Group LLC
- Heide & Cooke, Ltd.
From Honolulu Board of Water Supply (serves the Honolulu-Windward-Pearl Harbor and Waipahu-Ewa-Waianae systems) (dated March 14, 2024). 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.