In the insurance companies eyes and the USCG it's not. I dont know the coasties probably wouldn't say anything but they could and I don't want the fines. Not saying that it would happen just saying you find one that had a bad day and wanted to be a Butthole, but it's the insurance company that bothers me . I found Aeroquip AQP line is approved but it not braided , so maybe I'll go that way or stay with the rubber hose and stainless clamps. And yeah there is a rule about lines it must be stamped with a number which I have to look up cause I have forgotten .

Rubber hose? Definetly not approved. Run whatever you want but for insurance purposes, that is their easy way out. Only hard line (stainless steel lines) like from merc. Rubber is allowed on the suction side.

It's not the insurance eyes. You are going to have to school your agent or change providers.

Braided hose should not be a problem, or get a good survey done by a USCG approved person.

Either way you should not have a problem getting insured, IMHO.

Parker 221FR marine fuel and engine hose. 221FR hose specifications and ... ISO 7840 and USCG approved. ... SAE J1527 TYPE A CLASS I, USCG SAE J1942 / ISO ...

Hello No SS braided hose will be USCG approved , Without a outer cover, if you were to get a leak it would not spray all over the engine. the hose above my not have the look that your looking for but is very good stuff. Buy Parker hose & add SS covering. John 27 years at sea

I get they are always looking for an out (did insurance work for years) but I've sold a few boats over the years and they were inspected by the buyers certified surveyors and not one ever mentioned a rubber fuel line as an issue. It's just like the issue of T-clamps and hose clamps. The rule is you must use 2 hose clamps. I'll use a single T clamp and sleep fine at night and better then if I use the 2 hose clamps.