Calgary Radiant Heat is listed under the City of Calgary approved or certified tester list.  To be listed with the City of Calgary you only need a 1 week training course.  Yes, that is correct, you only require a 1 week training course to receive your certification.  Calgary Radiant Heat's certified testers have more than just a one week course.  We have two certified Master Journeyman Plumbers who not only can test your device, however we are also certified to install and repair them as well.  While we are at your home, maybe you have other plumbing, irrigation or radiant heat questions for us.  Why pay for a service that anyone can get certified to do?  Get the professionals.  It doesn't cost any more money to have a certified Master Journeyman Plumber test your cross connection control device or backflow device.