Many conversions in northern climates benefit from HIH. While initially appearing quite complicated and leak prone they are actually quite inexpensive and safe.
| The following design uses 3/8" aluminum fuel line and 3/4" heater hose with a 5/8" heater hose connection in the vehicle system. |
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Parts list: |
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Item Description |
Quantity |
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| 3/8" Compression x 1/2" NPTF Male Pipe (Brass) | 2 | |
| 1/2" NPTF Female Pipe Tee (Brass) | 2 | |
| Brass Hose Barb, 3/4" Hose x 1/2" NPTF Male | 2 | |
| Brass Hose Barb, 5/8" Hose x 1/2" NPTF Male | 2 | |
| 3/4" Coolant/Heater Hose | As Req | |
| 3/8" Aluminum Fuel Line | As Req | |
The aluminum fuel line would seal at the compression fitting, but instead of ending would continue through the pipe tee and concentric with the 3/4" coolant line.
Two of these fittings would be required to complete the hose in hose design.
