Update: Interchange: Armstrong Hose RB1450-1-4IDX1-20D

In previous posts, we have indicated that we have substituted RB1450-1-41DX1-20D hose with 1/4″ silicone hose for the vent lines leading from the front hubs to the vent system.

This same hose is indicated for use on vent lines and in the fording kit. We have found that this interchanges to Eaton Weatherhead H10104.

UPDATE (12/29/2018): Apparently AC Delco 32102 (SAE J30R7) is not legal in California. We were denied sale both by Amazon and Ebay vendors.  At this time it appears its illegality is that it has too high of a fuel permeation rate relative to other hose ratings (despite the fact we are using the hose for venting, not fuel). We have ordered SAE J30R9 hose (fuel injection hose) in place of the AC Delco 32102.

J30R9 hose is still quite not identical in specification to the RB1450-1-41DX1-20D hose, as it is is rated to a maximum operating pressure of 100 p.s.i. (compared to the 350 p.s.i. of the Eaton H10104), and a burst pressure of 900 p.s.i. Regardless, for underhood and venting purposes, J30R9 hose will be superior to the J30R7 hose.

The temperature rating of J30R9 is -31°F to 275°F (intermittent to 302°F); which is superior to either the J30R7 or the H10104, although the cold temperature limit has been slightly decreased from -40 F to -37 F.

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We have ordered AC Delco 32102 (the 25′ length of SAE J30R7 1/4″ hose) as a potentially less expensive, but just as serviceable replacement. Our concern is not heat (as silicone has considerably greater working temperature range), but more concern about potential abrasion issues.

This hose is intended for Fuel Line PCV/EEC, and is apparently repackaged Gates hose. Intended for low pressure (50 p.s.i.), this should suffice for venting purposes as well as be able to handle underhood heat. (rated -40 F to 257 F).

It is rated considerably lower than Eaton H10104, which has a pressure rating of 350 p.s.i, but a slightly lower rating of -40 F to 212 F.