Backflow Testing in Delaware
Backflow Testing across Delaware: the 96 ZIP codes and 57 cities we route calls in, and who licenses plumbers in the state.
Free to homeowners in Delaware — the contractor pays us for the introduction, you never do.
Who has to test
Our backflow testing coverage in Delaware runs to 96 ZIP codes in 57 cities. Where the covered places are many and small, the testing duty is set by whichever water utility serves the connection, so two houses a mile apart can sit under different rules and different annual deadlines.
Source: coverage area as published by our call partner; place and county names from the US Census Bureau.
We route backflow testing calls in 96 ZIP codes across 57 Delaware cities, in 3 counties.
What this site is
CrossConnect is a referral service, not a contractor. We connect property owners and managers with independent contractors. Backflow assembly testing is normally restricted to testers holding a specific certification and using calibrated equipment, and the report usually has to reach your water purveyor — ask to see the certification and ask who files the report. We carry out no testing, we certify nobody, we do not set prices, and we never charge callers anything. Nothing here selects a device for any installation or states that any assembly is passing.Checking a credential in Delaware
Delaware licenses are issued by the Delaware Board of Plumbing, Heating, Ventilation, Air Conditioning and Refrigeration Examiners, which publishes a public search you can use before work begins.
Every Delaware county we cover
- Kent County 20 ZIP codes
Dover, Camden Wyoming, Cheswold, Clayton, Dover AFB, Felton, Frederica, Harrington, Hartly, Houston, Kenton, Magnolia, Marydel, Smyrna and 2 more - New Castle County 51 ZIP codes
Wilmington, Newark, New Castle, Bear, Claymont, Delaware City, Hockessin, Middletown, Montchanin, Odessa, Port Penn, Rockland, Saint Georges, Townsend and 2 more - Sussex County 22 ZIP codes
Bethany Beach, Bethel, Bridgeville, Dagsboro, Delmar, Ellendale, Fenwick Island, Frankford, Georgetown, Greenwood, Harbeson, Laurel, Lewes, Lincoln and 8 more
What that coverage looks like
The 3 counties in our Delaware footprint are served by many separate water suppliers, and each one decides which premises must test and how often. New Castle County, with 51 covered ZIP codes, is the largest single block of them; Wilmington alone holds 25.
How a backflow testing job goes
A backflow test is a scheduled job that ends in a document. The assembly is isolated, the differential across it is measured, the result is written down, and the report goes to whoever requires it. A failed test means a repair or a rebuild and then a re-test; it does not mean the premises closes that day.
What the call asks about backflow testing
- What kind of premises it is and what is connected to the supply — irrigation, a boiler, a fire line, a commercial kitchen.
- Who is asking for the test: a water supplier, a health department, or a landlord.
- Whether there is an existing assembly with a serial number on it, and when it was last tested.
Every Delaware city we route in
14 cities, ordered by the share of buildings with twenty or more units. Containment assemblies are required building by building, and that is where the buildings are. Each page carries that city’s own numbers and the ZIP codes we route there.
- Claymont 12%
- Wilmington 11%
- Hockessin 8%
- Rehoboth Beach 7%
- Milford 7%
- Newark 6%
- Dover 6%
- Georgetown 4%
- Lewes 3%
- New Castle 3%
- Seaford 3%
- Townsend 3%
- Bear 2%
- Harrington 2%
Before you call
A test is a scheduled job with a report at the end of it, not a repair. What the report has to show, and who it goes to, are on the pages above.
