Fire sprinkler systems explained: wet pipe, dry pipe, pre-action, and deluge. Learn when to use each one and how to choose the right system.

Architects don't design fire sprinkler systems, but you make dozens of decisions that directly affect how they get designed, installed, and coordinated. This episode breaks down all four types of fire sprinkler systems, explains what makes each one different, and gives you a simple decision framework for choosing the right system based on occupancy, climate, and what's inside the space.

We cover how wet pipe sprinkler systems work as your default starting point, when to switch to a dry pipe sprinkler system for freezing conditions, why pre-action sprinkler systems exist for museums and data centers, and when a deluge sprinkler system is the only option. We also get into the design coordination that lands on your drawings, including fire department connections, riser rooms, ceiling coordination, and sprinkler head types.

This topic crosses PA, PPD, and PDD on the ARE, and understanding the decision framework will help you answer any fire sprinkler question the exam throws at you.

📝 Key topics covered:

• Wet pipe sprinkler system: how it works and where to use it

• Dry pipe sprinkler system: solving the freezing problem

• Pre-action sprinkler system: protecting sensitive contents

• Deluge sprinkler system: high-hazard flood response

• Fire department connection (FDC) placement and coordination

• Fire sprinkler head types: pendant, upright, sidewall, concealed

• Sprinkler system decision framework for the ARE

• Mixed systems in a single building

• NFPA 13 and the architect's coordination role

• Common sprinkler system mistakes on the exam

⏱️ Chapters:

(0:00) Introduction

(2:56) Wet Pipe Sprinkler Systems

(5:26) Dry Pipe Sprinkler Systems

(8:10) Pre-Action Sprinkler Systems

(11:22) Deluge Sprinkler Systems

(13:14) Choosing the Right System

(15:48) Design Coordination

(18:19) Quick-Fire Scenarios

(20:03) Common Mistakes

(21:16) Wrap Up

📖 Read the full blog post

📝 Download the FREE 2-page fire sprinkler systems study guide

🎯 Get access to all ARE study materials with the ARE 101 Membership

🎯 Join our 10-week ARE Boot Camp

📚 Individual ARE Exam Courses:

• PPD 101 (Project Planning and Design)

• PDD 101 (Construction Documents and Specs)

• Building Codes 101

• PA 101 (Programming and Analysis)

• Mechanical Systems 101

• CE 101 (Construction and Evaluation)

• CDT 101 (Construction Documents Technologist)

• CCCA 101 (Construction Contract Administration)

• PcM 101 (Practice Management)

• PjM 101 (Project Management)

• AIA Contracts 101