Montgomery County, Maryland
Backflow Testing in Montgomery County, MD
Nationwide Backflow Services tests, repairs, and installs backflow prevention assemblies across Montgomery County — the WSSC Water service area. Our technicians are WSSC-registered cross-connection specialists and licensed plumbers, so one visit covers the test, any repair, and the report filed with WSSC on your behalf.
WSSC compliance
On WSSC water, your Montgomery County test is due every year.
Every testable assembly is tested at installation and once a year after — plus any time it's repaired, replaced, or relocated. The report is due within 30 business days, and only a WSSC-registered technician can file it. That's us.
WSSC requires annual backflow testing in Montgomery County
Every testable backflow assembly in the county has to be tested when it is installed and once every year after that — and again any time it is repaired, replaced, or relocated. WSSC Water expects the completed test report within 30 business days.
By WSSC code, only a cross-connection technician who is registered with WSSC Water and licensed as a journeyman or master plumber may perform the test and submit the report. We hold both credentials, and the filing is transmitted to WSSC electronically through our registered principal master plumber.
Not sure what WSSC has on file for your property, or when your test is due? Montgomery County's cross-connection office can be reached at 301-206-7932 — or send us the address and we will check the cycle for you.
How a test works
Four steps, and the paperwork is on us. Most single-assembly visits are wrapped up in well under an hour.
Schedule
Send the property address and roughly how many assemblies. We confirm a date — often the same week.
Test on site
A calibrated-gauge test on each assembly. Pass or fail is confirmed on the spot, with the readings recorded.
We file with WSSC
A passing report is transmitted to WSSC Water on your behalf, well inside the 30-business-day deadline.
Repair only if needed
If something fails, we quote the fix — usually same-visit — then retest and refile. Never sold work you don't need.
What a backflow test covers
We test every testable assembly type on the WSSC list — reduced-pressure (RP / RPZ), double check (DCVA), pressure vacuum breaker (PVB), and spill-resistant vacuum breaker (SVB). Each test uses a calibrated differential-pressure gauge and takes about 20–30 minutes per assembly, including a short shut-off of the water it protects.
- Pass or fail confirmed on site, with the readings recorded
- Passing report filed with WSSC Water the same week
- A copy of every report sent to you for your records
- Multi-assembly properties scheduled in one visit to keep downtime short
If your assembly fails
A failed test usually comes down to worn check springs, fouled seats, or a leaking relief valve — most of which we repair on the same visit with rebuild parts carried on the truck. If the body is cracked or obsolete, we will size and quote a replacement matched to the hazard and the system it protects. Either way, we retest after the fix and file the passing report so the property stays compliant.
Backflow services across Montgomery County
- Annual and post-repair testing of RP, RPZ, DCVA, PVB, and SVB assemblies
- Same-visit repairs and rebuilds, followed by a passing retest and refile
- Assembly replacement, sized to the hazard and brought up to code
- New installation for irrigation, fire lines, boilers, and process equipment
- Facility-wide cross-connection surveys for larger properties and portfolios
Where we work in Montgomery County
If your property is anywhere in the county and on WSSC water, we cover it — including:
Common questions
Backflow testing in Montgomery County.
Who can legally test my backflow assembly in Montgomery County?
Only a technician registered with WSSC Water as a cross-connection specialist who is also a licensed journeyman or master plumber. Our technicians hold both, and the report is transmitted to WSSC electronically by our registered principal master plumber.
How do I know when my test is due?
WSSC ties the due date to your installation or last test date — usually the same month each year. WSSC mails a courtesy reminder, but the obligation sits with the property owner. Send us your address and we will check the cycle for you.
Do you file the report, or do I?
We do. A passing test report is filed with WSSC within the 30-business-day window, and we send you a copy for your records.
What does a backflow test cost in Montgomery County?
Pricing depends on the number and type of assemblies on the property. Send us the address and an assembly count and we will send back a firm quote — there is no charge for the estimate.
My assembly is on a lawn irrigation system — does it still need testing?
Yes. Irrigation systems are a common cross-connection hazard, and their assemblies (usually a PVB or an RP) are on the annual testing list.