Aquarium Plumbing Question, Bulkhead fittings?
by Aquaboy on Friday, March 19th, 2010 | 2 Comments
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 
Finding the right sized bulk heads is a pain. I know this isn’t the best answer there is though what I had to do was take a piece of paper, set it against the hole, shade with pencil so you have the exact size of the hole and go to a saltwater specialty shop and match up the proper bulk heads. A little secret, most people just get pvc pipe fittings with some neoprene on the inside tank side and tighten these. I personally have bulkheads on most of my tanks though I’m drilling a lot more of them soon and I’m just going to go w/ pvc fittings tightened against the glass with some neoprene or other washer type material on the inside.
Or other option will be to go on a shop selling aquariums.They know every detail about it and you can ask which one could perfectly fit the size of your holes.