What steps will reproduce the problem?
1. Try to connect waterproof pipe to oil or lava fabricator
2. Try to connect conductive pipe to energy link 

What is the expected output? What do you see instead?
Pipes should show connected but they show unconnected state even if they work 
otherwise correctly.

What version of the product are you using? On what operating system?
1.4.4/1.4.5

Please provide any additional information below.
Managed to fix the problem by adding liquid inventory to oil/lava fab, unsure 
if there is a better way or how to fix energy link conductive pipe similar 
issue.