BuildCraft version: 7.99.18
Forge version: 14.23.5.2770
Link to crash report or log: https://1drv.ms/t/s!AlxEbPeMguZpgYJDVQzzcm2HmOq7eQ
Singleplayer or multiplayer: SinglePlayer
Steps to reproduce: Right click on a Wooden fluid pipe with a YetaWrench of EnderIO
Additional information:

In theory this should now be fixed in 7.99.19-pre7, could you test it to make sure it is now fixed?

Hello, I tried the latest preview (7.99.19-pre7) and no crash using the YetaWrench on a Wooden fluid pipe.
I tried in single and multiplayer (I have my own server).

Thank you.