what do you guys use to seal your fittings on low pressure chillers

[Troy Love]

what do you guys use to seal your fittings on low pressure chillers , currently using vac. grease .

[Healey Nut]

If its a threaded fitting , teflon pipe dope .

[milkyway]

Silicone-loc tight

[Tech Rob]

Depends on the fitting. >1/4" NPT/S fittings I use nothing but teflon tape. I use a tap and die to clean up any threads that look questionable. <1/4" NPT/S, I've had pretty good luck lately with that Nylog stuff that everyone here loves to rave about. Vacuum grease is nice, but I don't use it on threads. I use it to help install and seal small o-rings, and also to help big o-rings stay stuck in place. It's also handy for making sure copper gaskets stick to flare fittings when you're putting a cap on. One tube will last a very long time.

[Troy Love]

Silicone-loc tight

Hey Milkyway just looking up the loctite silicone , theres a billion of them any specific type you prefer

[Troy Love]

Thanks Healey nut , Milkyway and Tech Rob that stuff Nylog looks like good stuff , . With that said that gives me 15 post and makes me a professional at nothing more than being able to ask simple question of you real pros let it be said I appreciate your guys time and knowledge , makes my job alot easier. thanks again.

[Tech Rob]

No problem. Thanks for returning to check on your threads and participating in active conversation, instead of starting a thread and going AWOL like most new members do.

[milkyway]

You can get loc tight 515 ( is what I like) at united or re Michel ., other professionals on here may suggest a different # . But remember don't over due it, and it does as its name says.

[Troy Love]

You can get loc tight 515 ( is what I like) at united or re Michel ., other professionals on here may suggest a different # . But remember don't over due it, and it does as its name says.

Thanks Milkyway I have some of that on site will check it out .

[milkyway]

Good job on the 15 post , actually I think this qualify a you aaa a regular guest now instead of new guest, what You need to do now is apply for pro status, it's not a big deal , just submit ur app now.

[milkyway]

Grape jelly.. Yumm

[KnewYork]

While working for a manufacturer leaks were a majority warranty expense. At one time, all mechanics working for the company had to attend a class put on by Loctite. We had very specific instructions on what we could and could not use.

We were specifically instructed that Teflon tape was unacceptable. In the early days of this new awareness we were told to use Loctite 565. Later the company started using a more aggressive sealant Loctite 554 refrigerant sealant for fittings 3/4" and up. Eventually, the company went to SAE fittings and o-rings. Through the education and use of appropriate sealants the warranty claims for leaks were cut dramatically.

[Troy Love]

Good job on the 15 post , actually I think this qualify a you aaa a regular guest now instead of new guest, what You need to do now is apply for pro status, it's not a big deal , just submit ur app now.

Done