Quote:
Originally Posted by retiredguy123
If you install a vacuum breaker, I think it will work fine by either removing or not tightening the set screw. You can always install it later. But, once you tighten the set screw, you will not be able to remove it because it is designed as a tamperproof device. You may also be able to find a non-tamperproof set screw that could be removed to replace the vacuum breaker.
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Easiest way to remove a defective one (before replacing with a new one) is to use a small rotary tool such as a Dremel tool. Cut above and below the set screw, pry off the middle, and unscrew.