Our residential fire sprinkler system

Living in the country, far from any volunteer fire department, is asking for disaster in the case of a residential fire.  Because most house fires start within, even our mostly concrete house could suffer terrible damage in the case of a fire.  Traditionally, fire sprinkler systems for homes were too expensive, but that has changed.  New codes are in place and new technologies to make it faster and easier to get sprinkler protection into every room.  Below are the concepts for a “loop” design based on the new NFPA 13-D standard for one and two family homes.   Flexible 1 1/4” PEX loops through the house making two connections back to the well water supply.  1/2” drops join the sprinkler heads to the main pipe.

We will use Viking Model VK 457 concealed pendent sprinklers for most rooms and the Viking Model VK 453 Horizontal sidewall sprinkler head for the stairway.  Thanks to Brother Mike for his excellent research and design work...

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Main floor

Top floor

1.25” PEX supply

Viking pendent sprinkler heads

1” PEX drops

3D view

3D view with stair shaft

3D view with walls

Viking VK 453 horizontal headhttp://www.watts.com/pages/_products_details.asp?pid=7432
Viking VK 457 concealed pendent headhttp://www.watts.com/pages/_products_details.asp?pid=7434http://www.watts.com/pages/_products_details.asp?pid=7434http://www.watts.com/pages/_products_details.asp?pid=7432shapeimage_6_link_0shapeimage_6_link_1
Sprinkler head plan

1 Viking 453

6 Viking 457

4 Viking 453

3 Viking 457

1 Viking 453

7 Viking 457


  6    Viking 453

16    Viking 457


check valve

full flow



Thread size: 1/2” NPT

Thread size: 1/2” NPT