RP Test Procedure USC 10th Edition MAKO 5 Valve Test Kit

[@jameskitzmann6268]

That is a sweet looking gauge. Wish i could justify buying a new one

[@randyroberts8373]

I just wanted to let you know that you did not finished the test of the RP device during the video. You did not check the #2 check to see what it holds at.

[@arbiterbackflow]

Hello Randy, thank you for your comment. In this video we were strictly illustrating the field test procedure as described in USC Manual 10 which calls for determining whether check valve #2 "holds tight" or "leaks" rather than recording the differential pressure at which it holds. There is an excellent discussion about this topic in an article called "About the RP Field Test" from the Summer 2013 issue of USC Cross Talk: fccchr.usc.edu/_downloads/Cross%20Talk%20Archives/2013.31.3.pdf. We are currently working on making additional videos and in our next RP demonstration we can show the CV#2 differential being recorded. Thanks again for your comment!

[@roku4478]

Could you explain what the recorded values mean?

[@arbiterbackflow]

Hello ro Ku, in this video the captured values that are specified are: 1. The APPARENT differential pressure (PSID) across the #1 check valve 2. The PSID at which the relief valve first opens (must be 2.0 or greater in field testing) 3. The ACTUAL differential pressure across the #1 check valve (must be 5.0 or greater in field testing). In field testing following USC Manual 10, the tester will also record whether the #2 check valve held tight to backpressure. We hope you found this video helpful! For more information about the Mako gauge, please visit arbiterbackflow.com

[@koby1144]

Does the Mako5 has to be sent to recalibration every year?

[@arbiterbackflow]

Koby, the Mako gauge DOES require annual calibration verification. This can be performed by any of the calibrators found on our list (arbiterbackflow.com/calibration).