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Aquarium Plumbing Question, Bulkhead fittings?

I currently have an overflow box setup as part of my project but i need to know what size fitting i need for the bulkhead.The holes in the overflow box are 32mm big, so what size bulkhead do i need? i searched for a 32mm bulkhead but the '32mm' seemed to be for the pipes, rather than the hole it fits, infact it said in the description that it 'requires atleast a 42mm hole'.If anyone knows what size bulkhead i need that would help, if you get me a link to a shopping site in the UK you get the 10 points best answer.First come first served!Thanks in advance :D


Vehicle alarms don't usually have motion detectors protecting the interior because passing traffic would cause false alarms. If you leave the windows open the alarm won't get triggered by reaching or even climbing into the window. However, if you try to open a door without first disabling the alarm it will go off. There are some motion sensor systems on auto alarms that detect impacts or attempts to tow, but these are really vibration sensors, not motion detectors like you have in a home or business.
if (you might not be able to go direct,if so use a local body shop that does business with them

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