Sprinklers, hydraulics, fire pumps, hydrants, standpipes and special systems — practical NFPA and EN design notes.
Twelve sprinkler design errors that get submittals rejected, from hazard class, area modifiers and remote area shape to C-factors, obstructions, hangers and FDC position.
12 Common Sprinkler Design Mistakes Reviewers Reject Read More »
A step-by-step checklist for laying out a fire pump room: enclosure, access, heating, suction rules, discharge train, test header, controllers, diesel fuel and jockey pump.
Fire Pump Room Design Checklist Read More »
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 »
A side-by-side comparison of EN 12845 and NFPA 13 sprinkler design: classes, densities and areas, hose allowance, durations, spacing, pressures and what it means on a project.
EN 12845 vs NFPA 13: Key Differences for Designers Read More »
Dry pipe for freezing, single-interlock preaction for water-sensitive rooms, double interlock for freezers: how they work, the design area rules and how to choose.
Dry Pipe vs Preaction: Choosing the Sprinkler System Type Read More »
The NFPA 13 spacing and location rules for standard-spray sprinklers in one place, from S × L protection area to obstructions, with a worked 15 × 24 m office layout.
Sprinkler Spacing Rules: Areas, Wall Distances and Obstructions Read More »
How to run a sprinkler hydraulic calculation by hand, from the most remote sprinkler to the supply, with a fully worked six-head OH2 example and supply check.
Sprinkler Hydraulic Calculation: A Step-by-Step Worked Example Read More »
A practical guide to NFPA 13 occupancy hazard classes, with typical design values, a repeatable classification method and a worked example of how the class drives tank size.
Sprinkler Hazard Classification: LH, OH1, OH2, EH1 and EH2 Explained Read More »
Size a fire pump to NFPA 20 in clear steps: net pressure, standard ratings, curve and pressure checks, motor power, suction rules and jockey settings, with a worked example.
Fire Pump Sizing to NFPA 20: Rated Point, Curve Checks and Jockey Read More »