I replaced an NF8 on the outside of my house. First, was it right to use plumbing tape to minimize leakage. Second, its still leaks a little - is there anything I can do to stop the leak. Third(and most important), when you go to turn off the water all the water in the hose will suddenly blast out of the connection between the hose and the NF8. This didn't happen before. What did I do wrong or what do I need to do to fix it. (I didn't remove the little screw on the side - would that matter) Thanks Greg

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Originally Posted by gmolnar

I replaced an NF8 on the outside of my house. First, was it right to use plumbing tape to minimize leakage. Second, its still leaks a little - is there anything I can do to stop the leak. Third(and most important), when you go to turn off the water all the water in the hose will suddenly blast out of the connection between the hose and the NF8. This didn't happen before. What did I do wrong or what do I need to do to fix it. (I didn't remove the little screw on the side - would that matter) Thanks Greg

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WTH is an NF8?

Good one growler. I never heard of a NF8 and just read this one to see WTH it is.

Series NF8 Hose Connection Vacuum Breakers are designed specifically for wall and yard hydrants to prevent the reverse flow of polluted water from entering into the potable water supply due to backsiphonage.

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Originally Posted by gmolnar

Series NF8 Hose Connection Vacuum Breakers are designed specifically for wall and yard hydrants to prevent the reverse flow of polluted water from entering into the potable water supply due to backsiphonage.

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So why not just call it a NF8 hose connection vacuum breaker from the outset and eliminate the mystery?

1) It should have come with a hose washer, negating the need for teflon tape.

2) If it's still leaking a little, check to make sure it does in fact have a 7/8" hose washer in it.

3) When you turn the hose bibb off, the leaking you mention above probably actuates the vacuum breaker -- Solve the leaking problem and the spraying problem will likely go away.

4) The screw is meant to prevent the vacuum breaker from being removed -- If you tighten the screw the head of the screw will snap off (it's supposed to do this), but don't do this until you've solved the leaking problem.