# Looking for 3D filament thats compatiable with HHO-oxyhydrogen and NaOH sodium hydroxide -lye

I'm testing a HHO generator (oxyhydrogen - browns gas generator) and I use 1% NaOH solution (sodium hydroxide -lye). I made some M8 threaded adapters for it using PETG (Polyethylene terephthalate glycol) which works for storage. But I notice the M8 threaded adapters starting to disintegrate when the generator is running. Does anyone know of a low cost filament that will work with a HHO generator (oxyhydrogen - browns gas generator) and a 1% NaOH solution (sodium hydroxide -lye).

1. I'm not using glass in the main generator
2. I'm using 2 bubblers for safety with flashback arrestor.
3. The printer I have access to is a Prusa Mk3s FDM
4. The HHO generator doesn't use more than 2 amps to generate HHO so the device is cool to the touch (not much heat is generated)

This is what some of the M8 PETG adapters look like.

https://pawplus.wordpress.com/3d-designs-page-2/

Thanks

• Worth noting that sodium hydroxide will etch glass. Oct 12 at 11:06

• @PerryWebb PETG "should work" in my physical tests PETG does not work in the generator (I already tried). The adapters break down after 2 or 3 days.. Also the liquid doesn't get hot, it only increases 5-10 degrees warmer than room temperature. I'm looking into Polypropylene and the different blend types like @Mick said Oct 12 at 18:44