Geothermal heat pump elbows attach to the front of the unit and allow a flexible reinforced rubber hose or hard piping (copper, HPDE, PEX) transition to the flow center or loop. Reinforced rubber hose is typically used to provide ease of installation, and a vibration break between the heat pump and the flow center or interior piping to eliminate sound transmission through the home or building. Heat pump elbows have a 1/4″ FPT (female pipe thread) port allowing the installation of a PT plug. This is an extremely important component of a geothermal or water source heat pump as it allows a differential temperature (delta-T) and differential pressure (delta-P) measurement across the unit’s heat exchanger as a basic performance check. Every geothermal and water source heat pump should include these PT ports . Note that water-to-water heat pumps should also use these elbows on the load side of the heat pump. Elbows for the load side of water-to-water units are typically MPT X FPT to allow hard piping, and are available in 1″, 1-1/4″ and 2″ sizes.
| PN | Description | Inlet | Modifier | Outlet | Modifier | W/ PT | U.O.M | Photo |
|---|---|---|---|---|---|---|---|---|
| 2265 | 3/4" Male Pipe Thread X 1" Hose Barb w/ 1/4" PT Port | 3/4" | MPT | 1" | HB | W/ 1/4" PT PORT | EACH |  |
| 3255 | Flo-Link Elbow X 1" Male Pipe Thread w/ 1/4" PT Port | FL ELBOW | 1" | MPT | W/ 1/4" PT PORT | SET |  |
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| 3263 | Flo-Link Elbow X 1" Hose Barb w/ 1/4" PT Port | FL ELBOW | 1" | HB | W/ 1/4" PT PORT | SET |  |
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| 3447 | 1" Male Pipe Thread X 1" Hose Barb w/ 1/4" PT Port | 1" | MPT | 1" | HB | W/ 1/4" PT PORT | EACH |  |
| 3461 | Insulating Boots for 1" Elbows | (ELBOW) INSULATING BOOTS | 1" | SET |  |
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| 3481** | 1" Male Pipe Thread X 1" Female Pipe Thread w/PT Port | 1" | MPT | 1" | FPT | W/ 1/4" PT PORT | SET |  |
| 3500** | 1-1/4" Male Pipe Thread X 1-1/4" Female Pipe Thread w/ 1/4" PT Port | 1-1/4" | MPT | 1-1/4" | FPT | W/ 1/4" PT PORT | SET |  |
| 3556 | 1-1/4" Male Pipe Thread X 1-1/4" Hose Barb w/ 1/4" PT Port | 1-1/4" | MPT | 1-1/4" | HB | W/ 1/4" PT PORT | EACH |  |
| 3660** | 1-1/4" Male Pipe Thread X 1-1/4" Hose Barb w/ 1/4" PT Port | 1-1/4" | MPT | 1-1/4" | HB | W/ 1/4" PT PORT | SET |  |
| 3924 | Flo-Link Elbow X 1" PE Fusion w/ PT Tap | FL ELBOW | 1" | PE FUSION | W/PT TAP | SET |  |
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| 4309 | 3/4" Male Pipe Thread X 3/4" Hose Barb w/ 1/4" PT Port | 3/4" | MPT | 3/4" | HB | W/ 1/4" PT PORT | EACH |  |