# Backflow testers in Northbrook, IL

Browse backflow testers with an address in Northbrook. Check availability and utility registration.

2 backflow testers. Also on the [web page](https://backflowtesters.fyi/us/il/northbrook).

## Backflow testers

1. [Bill's Plumbing & Sewer Inc](https://backflowtesters.fyi/us/il/northbrook/bills-plumbing-and-sewer-inc.md), Backflow testing, 1855 Holste Rd, Northbrook: Bill's Plumbing & Sewer Inc appears in Aqua Backflow’s vendor-run tester locator, with an address in Northbrook, IL. The export does not identify the utility…
2. [Mergenthaler Inc](https://backflowtesters.fyi/us/il/northbrook/mergenthaler-inc.md), Backflow testing, 1450 Paddock Dr, Northbrook: Mergenthaler Inc appears in Aqua Backflow’s vendor-run tester locator, with an address in Northbrook, IL. The export does not identify the utility registration…

## Categories in Northbrook

- [Backflow testing](https://backflowtesters.fyi/us/il/northbrook/category/backflow-testing.md): 2 backflow testers

## Questions

### How many backflow testers are in Northbrook?

Backflow Testers lists 2 backflow testers with an address in Northbrook, IL.