Fuel issues- Tubing info
So, I pressurized the fuel tank - first I blast it good to get mud daubers out of vent lines, then plugged vent line with a bolt and shot 5 psi in tank.
Was like a fountain...anywhere there was a radius, she sprayed- about 4-5 spots. Close inspection under the corrugated wire hose cover revealed cracks. If fuel is coming out.... air is getting sucked in.All the new additives/alcohol/methanol/bio gunk they add to fuels now to increase their profits just eat our hoses and seals.
It's already got 1/2 line all the way to lift pump, 3/8 return and 5/16 for genset. Nothing kills like overkill, I always say.
1) Did some research, the best stuff out there is the hard lines- steel or stainless, but Swagelok fittings are pricey and brass won't compress stainless....No copper or aluminum- vibrations work harden and crack.
1/2''Dia X .035 X 100ft Type 316L coiled Stainless Steel Tubing .65/foot on ebay.
2) PTFE (Teflon) lined braided hose- good for ridiculous pressures and impervious to chemicals, good to 500 degrees. Needs special aluminum fittings=no barb fitting recycle. Lifetime stuff, used in racecars- even brake lines. Fittings killed the deal, pricey. Pandababy2007 has kits on ebay
3) Trident Rubber makes USCG marine hose that is lined to protect the rubber called TYPE A1 BARRIER LINED - can use existing fittings and is about $2/ foot an Amazon.
I don't want to repeat this job every 13 years, don't want air in the lines and don't want degraded rubber in my fuel.
May have to drop the 175 lb tank to see what is going on up there, will stick borescope camera in there before committing to that.
Big and slow...