nosoot
ArboristSite Member
What is the best material to use on hydraulic fittings -NPT -to seal threads against leaks? I have to replace some black iron elbows on a cast iron valve . The return side elbow is leaking and I had used pipe dope. I am going to replace both pressure and return elbows with hydraulic fittings but I was wondering if there is something better than pipe dope. The paperwork that came with the valve said not to use teflon tape for risk of overtightening and cracking the valve.