Pressure Reducing Valve Testing - For Sprinkler System

[sv879]

NFPA-13-2019, Section 16.9.8.5 states that: Means shall be provided downstream of all pressure reducing valve for flow test at sprinkler system demand.

However, there is no further information available on how it can be accomplished. Kindly share your thoughts on this.

Thank you.

 

[UFT12]

Consult the manufacturer's literature. They usually include maintenance information as well. See for example Tyco's model.

https://www.tyco-fire.com/TD_TFP/TFP/TFP1580_08_2018.pdf

Typically, you need to provide a drainage facility sized for the design flow of your system. Say a building with multiple floors would require to have drain riser with adequate capacity.

 

[sv879]

Hello UTF12,
Thank you for the information provided.

As far as I know, full flow test is required in every 5 years. In this case, do we really need a permanent set up for testing c/w flow meter and pressure gauge arrangement at downstream of prvs? (or) testing provision only? (ie, a normally closed valve and adequately sized drain riser). Appreciate further input on this.

 

[UFT12]

A flow meter is not required, at lest by 13 or 25 although often desirable in pump houses where I come from. Gauges are typically taken care of by the valve manufacturer.

 

[sv879]

Sorry I didn’t get it. Are you talking about the flow test arrangement at fire pump room?

I am talking about the flow test arrangement at downstream of prvs.

 

[UFT12]

You mentioned flow meters. These, as well as prvs, are often found in pump rooms. If your case is a typical multi-story system that some portions require pressure reduction, a flow meter is typically not required.

 

[sv879]

Kindly refer NFPA-13-2019, Section 16.9.8.5 states that: Means shall be provided downstream of all pressure reducing valve for flow test at sprinkler system demand.

I am still stuck in "means shall be provided.." How it can be done?

 

[cdafd]

Is this a general question or a system you are designing ??

Where in a system are you placing these??

If Prv is on hose valve hook up a hose.