Installation help?

[Ancient]

Does anyone know how to install these hard lines? I just bought a new head and new hard lines to go along with it. It appears that it just gets hammered in but I wasn’t sure if I needed to ad some sealant inside before I installed them.

Thanks in advance.

 

[mudgudgeon]

I used Loxseal thread sealing paste on these type of fittings in the past
Similar to loctite, but intended to seal in fluids

I used to have a tube in my tool box from doing plumbing work.

Threadsealing Anaerobic Adhesives | Loxeal S.r.l.

Threadsealing Adhesives guarantee hydraulic tightness of the threaded connections. Resistant to gas pressure, air, water, oils, hydrocarbons and chemicals.

www.loxeal.com

They make a high temperature resistant one