Zen Engineering Posted August 26, 2011 Share Posted August 26, 2011 Ive always been advised to avoid holes at the top, like said earlier, add a 90 bend with a short bit of pipe and use that. Link to comment https://www.thesecurityinstaller.co.uk/community/topic/31002-vesda-laser-compact/page/2/#findComment-276760 Share on other sites More sharing options...
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