I used the Pantera Place-recommended hose--NAPA part number NBHH178. Its stiff wall won't collapse under vacuum. From the NAPA Web site...
Attributes: Fuel Line / PCV / EEC Hose
I.D.: .4375'' (11.1mm)
Features & Benefits: MULTI-PURPOSE HOSE FOR USE ON FUEL LINES, PCV AND EEC SYSTEMS, AND FOR FUEL RETURN HOSE CONNECTIONS ON DIESEL FUEL INJECTION SYSTEMS. REINFORCED CONSTRUCTION. NITRILE TUBE. MODIFIED NITRILE COVER.
Working Pressure: 35 PSI
Enjoy,
Ron
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