5050racing
03-31-2013, 06:14 PM
Went to pull taps on my 9 tree run on a good slope with a total run of 350' elevation drop of about 40' and when I pulled the check valve taps on the top trees I heard a LOUD hissing for a while.There was a low spot in the tubing acting like a sink trap and the vacuum was unreal was not thinking there would be much!!