SET UP:
- Upon arrival, check last year’s pump test data for comparison.
- Utilizing the Hose Monster PITOTLESS chart make sure your calculations are correct.
- Use the proper side of the chart depending on your set up.
- Ensure fire pump suction and discharge ports are freely flowing and not clogged.
- ***Clogged ports can hinder accuracy of pump test readings***
OPEN ATMOSPHERE - Pitotless Nozzle is connected directly to a test header and flowing openly to atmosphere.
2 1/2" HOSE MONSTER - Pitotless Nozzle is connected to the 2 1/2" Hose Monster or Flusher.
GPM CALCULATION:
Know your fire pump data plate numbers:
100% - Rated GPM divided by number of hoses being flowed = GPM (on Hose Monster chart) = PITOT (PSI) you will need to achieve.
150% - Rated GPM multiplied by 1.5 = Rated GPM @ 150%
- Rated GPM @ 150% divided by number of hoses being flowed = GPM (on Hose Monster chart) = PITOT (PSI) you will need to achieve.
REMINDER: The more hoses you can flow the better to keep PITOT (PSI) number lower
NET PSI CALCULATION:
After completing fire pump test @ 100% & 150% to check NET PSI and compare to RATED PSI on fire pump placard.
DISCHARGE PSI minus SUCTION PSI = NET PSI (compare to RATED PSI on pump placard @ 100% & 150% if applicable)
***If the NET PSI @ 100% is not within 5% of the RATED PSI of the fire pump placard the pump test automatically fails per NFPA 25***
WHAT IF I DO NOT achieve RATED GPM @ 150% or suction is too low to continue the pump test?
Check the full system demand as provided by owner OR check the hydraulic placards for the highest system demand. PLEASE SEND IN HIGHEST SYSTEM DEMAND TO OFFICE AND DOCUMENT ON NOTES PAGE OF REPORT.
WHAT IF the site does not have hydraulic placards and the owner cannot supply the system demand?
Document on the deficiency page of the report no hydraulic placards on site and owner cannot supply the highest system demand.