Backflow Test Kit Calibration

ISO 17025:2017 Accredited

Marsh Metrology offers reliable and accurate backflow test kit calibrations. We have over 30 years of experience in the field of calibration. We are ISO 17025:2017 accredited and conduct all our business within the ISO 9001:2015 standard.

We frequently renew our calibration standards and procedures to fit within the most recent standards of calibration. By doing so we help you operate within lower margins of error, increasing your accuracy and quality of service.

Calibration & Certificate

A certificate traceable to NRC/NIST is provided with ‘as found’ and ‘as left data’.  In addition we offer an Accredited Calibration Certificate to ISO 17025:2017 for servicing ISO regulated companies. Marsh performs a complete evaluation of the test kits including; dis-assembly, cleaning, leak checks. We are compliant to the OWWA

How We Work:



Before calibrating, we disassemble your backflow test kit in order to ensure that all the internal components work within specifications and clean out any dirt or debris that may lead to inaccurate results.



We then calibrate your device to the required standard. If you are required by your municipality or client to provide an accredited calibration certificate, Marsh Metrology is fully ISO 17025:2017 accredited and authorized to provide you with a fully traceable ISO 17025:2017 Accredited Calibration Certificate.


Repair / Replacement

If we detect any damage to your device, we can assist with repair and re-calibration. In the event where a repair may not be feasible, or not possible, you may instantly purchase a calibrated backflow test kit directly from us. We stock the most popular and reliable models, which are pre-calibrated and ready for use, allowing you to start using your backflow test kit as soon as possible.

Get Started Now

Our experienced meteorologists can help you with any brand of backflow test kit, including but not limited to:

Convenient Service Options

We offer a wide array of calibration services, offered in a convenient way. 

on site calibration

On Site/In-Situ Calibration

We can perform on site and in process calibrations, which are ISO/IEC 17025:2017 accredited and traceable to the National Standards, complete with calibration reports and stickers.


Calibration Management

Our calibration management service provides you with in time notifications of instruments that are soon due for calibration. Our customer Portal provides you access to manage your assets as well as our warehouse for equipment storage and fast calibration retrieval


Diagnostic & Repair

Our calibration service offers equipment testing. Should your equipment fail calibration, we can repair and assist with the purchase and calibration of a replacement, in order to minimize your disruption.