I need to change the shaft seals for my pump. My manual states that I can push my gate valves ("T-handles")(I have 2 of them) down and turn to lock them, and that will enable me to work on the plumbing? The last time I tried this water kept coming out of the lines, but after it was all drained, I noticed I had forgotten to twist the handles to lock them down. Anyway, is this the proper way to work on the plumbing, to simple push down and lock the handles? Or should I just drain it to be safe?