Air Con Joints.

[frank rabbets]

Back in 2015 I posted re rebuilding my air con system. Still going strong with still good pressure. I forgot to post a problem I found at that time. Where the pies join there is an o ring which makes the seal. The joint is held together with a bolt which forces two flat surfaces of each joint half together. Problem is water is held between the flat surfaces by capillary action. Corrosion then creeps past the o ring and in doing so breaks the o ring seal and allows gas out. Putting some jointing compound on the flat surfaces avoids this in the years to come.

 

[Dave]

There’s a product called Nylog that keeps the o ring lubricated and prevents corrosion under/around the o ring.

 

[Grimbo]

^^^^^^^^^ ask an expert ;-)

 

[Towpack]

When I fitted a new condenser and drier several years ago I smeared silicone grease over the new O rings and joint surfaces and had no problems since.