旋塞
8.Open TC #4 and flush test cocks Nos. 1, 2, and 3 on BF assembly, then close TC #4.
9.Open test cock No. 4 and flush test cocks Nos. 1, 2 and 3 on reduced pressure assembly then close test cock No. 4.
10.Open test cock 3. Installing EZ-TC adaptor fitting opens test cock 3.


