How to connect a yard hydrant to a private fire main: tee and 150 mm branch, isolating valve, thrust restraint, frost depth, outlet height, flushing and hydrostatic test.
Fire Hydrant Connection to the Fire Main (NFPA 24 Practice) Read More »
Where to put a fire department connection and how to pipe it: access side, 30 m to a hydrant, 0.45–1.2 m inlet height, system-side connection, check valve, ball drip and signage.
Fire Department Connection (FDC): Location and Arrangement Read More »
How to build a fire alarm cause and effect matrix from the fire strategy: rows of inputs, columns of outputs, clear actions in every cell, lift and suppression logic, sign-off and testing.
How to Write a Fire Alarm Cause and Effect Matrix Read More »
The fall-of-potential method step by step: where to drive the probes, why 62 %, how to check the plateau and how to judge the result for TT, LPS and substation earths.
How to Measure Earth Electrode Resistance (Fall-of-Potential) Read More »
How to design condensate traps and drains for AHUs, fan coils and cassettes: seal height from the drain pan pressure, plinth height, falls, air breaks, condensate quantities and pump interlocks.
Condensate Drain Trap Design for AHUs and FCUs Read More »
How to place optical beam smoke detectors in large spaces: spacing between beams, distance to walls, mounting height, rigid fixing and a worked warehouse example.
Optical Beam Smoke Detectors: Where and How to Place Them Read More »