MidWest Instruments


Test Your Skills | January 2018

3 Comments
 12 Jan 2018   Posted by Sean Cleary


In this issue’s installment, we will look at installation issues and requirements. All types of cross-connection control must be installed correctly to provide the necessary protection required. In too many cases the protection installed does not meet the hazard or hydraulic needs of the installation. Let’s dig a little deeper into this part of the cross-connection puzzle. It’s time to pick up your pencil and test your knowledge.

If you have any comments, questions or suggestions please contact Backflow Prevention Journal’s Technical Editor; Sean Cleary at sean.cleary@iapmo.org

January 2018

An atmospheric or pressure vacuum breaker will provide protection against:
The physical air-gap is the best possible protection in all types of possible cross-connection control situations.
The installation of a barometric loop will protect against:
All testable backflow prevention assemblies will protect against high hazard situations.
The minimum amount of test cocks on a testable backflow prevention assembly is:
According to the 2005 Uniform Plumbing Code, the minimum height a backflow prevention assembly can be installed above the floor or grade is ___ inches and the maximum height it can be installed before a permanent platform is required is ___ inches.
According to the Uniform or International plumbing code, the required protection on the water supply to a typical lawn irrigation sprinkler system is the installation of a:
A major advantage in using a pressure or spill-resistant vacuum assembly (PVB or SVB) in place of an atmospheric vacuum breaker (AVB) is:
The installation of a reduced pressure principle backflow preventer in a vertical up flow orientation is:
According to the 2015 Uniform Plumbing Code the installation of a backflow prevention device or assembly create a closed system that requires the installation of (a):
All of the following assemblies, methods, or devices will provide high hazard protection except:
The proper protection on a fire protection system containing non-toxic propylene glycol is the installation of a:
Reduced pressure principle assemblies in pits or vaults are:
Physical air-gaps protect against:
Potable water is defined as water that is:

American Backflow Products


3 Comments

Ron Fennell
7 years ago



thank you

James Holeva
7 years ago



Drinking water, also known as potable water or improved drinking water, is water safe enough for drinking and food preparation.

suitable for drinking — it does not have to taste good or be aesthetically pleasing. Water can be safe to drink but contain contaminants provided that they are below the NPDWR MCL

Answer should be “Safe to Drink”

The field sanitation standard for agriculture (29 CFR 1928.110) defines “Potable water” as water that meets the standards of drinking purposes of the state or local authority having jurisdiction, or water that meets the quality standards prescribed by the U.S. Environmental Protection Agency’s National Interim Primary Drinking Water Regulations, published in 40 CFR Part 141. OSHA slightly updated its definition of potable water from referencing a non-existent Public Health Service code to one regulated by the EPA. Through it all, Potable water still means drinking water.

The official definition, your documentation should reflect: “Water that meets the standards for drinking purposes of the State or local authority having jurisdiction, or water that meets the standards prescribed by the U.S. Environmental Protection Agency’s National Primary Water Regulations (40 CFR 141).
This definition is in the following Standards: General Industry 1910.141(a)(2), Construction 1926.51(a)(6) and the Agriculture Field Sanitation 1928.110(b).

Bill Woods
7 years ago



good stuff, makes me put the old thinking cap on.