maroonls1z

I have a flow through fitting for a pressure sensors and I'm having trouble getting it to seal and not leak. I've tried multiple brands of fitting and liquid ptfe thread sealant. Is there a ethanol resistant ptfe tape? If so who makes it and where can I find it? Outside of getting a new pressure sensor, which seams an expensive option, any other ideas? I'm only running 58psi

Pacer Racer

iTrader: (6)

I have to install lines and fittings on fuel oil burners systems all the time I use something called Grip it's like a black Permatex types of sealant and is good for petroleum. I buy it at the local True Value Hardware store

maroonls1z

Problem is the system is for ethanol as well and don't want to use something that isn't ethanol resistant

Pacer Racer

iTrader: (6)

I've never tried it with alcohol, but have used it with water, fuel oil, and LP gas. I've used it with as much as 300 PSI

Sssnake

I have the same issue and just picked up some permatex form a gasket #3. I'll keep you posted.

maroonls1z

That's what I used with no luck, I'm going to try oatey yellow gas line tape

stevieturbo

I'm sure ptfe tape would have no issues with ethanol

Or PTFE paste.

Are you sure you're applying it and tightening it correctly ?

maroonls1z

Yes the paste held for about a week before it spring a leak and sprayed fuel everywhere

stevieturbo

If you're leaking that badly, you have bigger issues.

Are you sure you're even using the right threads for sensor and where it screws into ?

In theory they should seal with no additional sealant, although NPT threads are pretty ****.

maroonls1z

That's what I figured as well, I mean it 1/8 npt and I'm not an idiot. I actually contacted the pressure manufacturer to see if it might be a defect but they refused to replace it and suggested tape instead of paste. I'll give it a try next week, I just removed it and ran a union as of now