15
HP IOM, Rev. B
Enertech Global
Section 5: Unit Piping Installation
All interior piping must be sized for proper flow rates and
pressure loss. Insulation should be used on all inside piping
when minimum loop temperatures are expected to be less
than 50°F. Use the table below for insulation sizes with
different pipe sizes. All pipe insulation should be a closed
cell and have a minimum wall thickness of 3/8”. All piping
insulation should be glued and sealed to prevent condensation
and dripping. Interior piping may consist of the following
materials: HDPE, copper, brass, or rubber hose (hose kit only).
PVC is not allowed on pressurized systems.
Pipe Insulation Table
Typical Pressurized Flow Center Installation
Flow centers are insulated and contain all flushing and
circulation connections for residential and light commercial
earth loops that require a flow rate of no more than 20
gpm. 1-1/4” fusion x 1” double O-ring fittings (AGA6PES) are
furnished with the double O-ring flow centers for HDPE loop
constructions. Various fittings are available for the double
O-ring flow centers for different connections. Matching hose
kits come with double O-ring adapters to transition to 1” hose
connection.
Piping Material
Insulation Description
1” IPS Hose
1-3/8” ID - 3/8” Wall
1” IPS PE
1-1/4” ID - 3/8” Wall
1-1/4” IPS PE
1-5/8” ID - 3/8” Wall
2” IPS PD
2-1/8” ID - 3/8” Wall
Typical Single Unit Piping Connection (Pressurized Flow Center)
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Flow
Center
Hose
Kit
To/From
Loop Field
P/T
Ports
Source
Water In
Source
Water Out
HP Series
Equipment Pad
Interior Piping
