Sprinkler Installation Case Study #1
The home-owner requested a dual rooftop sprinkler installation on a waterfront 2 story seasonal home. The
location was in a mixed deciduous/coniferous environment that had experienced a major forest fire
approximately 100 years earlier. Water would be supplied by a Wickman 100 fire pump with external fuel
tank option for extended run capability.
A neat appearing installation was required. In consideration of the building design with accessible attic area; cedar
siding with vertical corner trim boards; and simplicity of installation, the illustrated approach shown here was chosen.
All materials used were readily available from our company or the local plumbing/hardware store. Installation time
was about 10 man-hours. All work was done by the homeowner using basic tools.
This is the "Before Picture"
of the corner of the building where the main supply line leading to the attic will be installed.
Vertical corner boards have been removed.
Corner has now been cut back leaving a space to
accommodate the supply line. In this case, the depth of the space is 1¾" to receive the 1" plastic
Supply line is now in place and waiting for the vertical
corner boards to be reinstalled. Note the following items:
- Straps securing the pipe. Several used.
- Level of pipe & fittings must be below level of siding
- Caulking behind and beside pipe to fill void
- Filler pieces added between siding boards to block weather and insects intrusion
Vertical corner boards have been reinstalled with no
nailing mistakes made. Corner of building looks like it did before but with connection (and protective cap)
View inside unfinished attic showing supply line leading
to 1 sprinkler. A "T" fitting (not visible) splits water flow to feed opposite ends of the attic. When a
single water line supplies more than one sprinkler, each sprinkler should have its own control valve.
View of water line to second sprinkler. Make sure
that all interior lines will drain naturally. As plumbing exits the attic to the sprinkler, be sure that it is securely
fastened to prevent movement due to pressures from the rotating head.
View of installed sprinkler head. Larger diameter
pipe exiting the roof provides support to offset lateral forces due to directional spray from rotating head. From
the ground, sprinkler looks like other stacks present on typical roofs.
Now For The Test!
Hose from fire pump is attached and line pressurized.
Should be "raining".
Yes -- it works. Look carefully to see both
sprinklers operating. Trying to get a camera shot while looking into the bright sky and dodging the spray is a
Another view of the manufactured shower. Success!
Yes, it remains in place over the winter.