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Pier and Beam (crawl space)
New and Retrofit Construction: Bury the pipe beneath the
footing and between piers to the point that it is directly
below the point of entry into the building. Bring the pipe
up into the building. Shield and insulate piping as shown
in Figure 19 to protect it from damage.
Figure 19. Pier and Beam Entry Detail
Insulation Inside
Protective Shield
Finished Grade
4-6'
Loop Pipe
Below Grade Entry
New and Retrofit Construction: Bring the pipe through
the wall as shown in Figure 20. For applications in which
loop temperature may fall below freezing, insulate pipes
at least 4 feet into the trench to prevent ice forming near
the wall.
Upon completion of the ground loop piping, pressure test
the loop to assure a leak free system.
Horizontal Systems: Test individual loops as installed.
Test entire system when all loops are assembled.
Vertical U-Bends and Pool Loop Systems: Test Vertical
U-bends and pond loop assemblies prior to installation
with a test pressure of at least 100 psi. Either water or air
may be used as the testing medium.
Figure 20. Below Grade Entry Detail
1-1/2" PVC
repair coupling
2" hole &
Silcone Caulk
Hydraulic Cement
each side
Footer
20
1-1/2" SDR21
1-1/4" x 1-1/2" Fernco
PVC Sleeve
Final Grade
Dirt Fill
Gravel backfill
1-1/4" SCH40
PE Pipe
gasket coupling
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