15mm tank connector?

"Bill Stock" wrote in message
...
I had an idea for a 'new' pond filter and I wanted to build a scale model
before digging large holes in the backyard. Even though it's only
temporary, I'd still like to make it as leakproof as possible. The one part
I'm having trouble dreaming up is a minature bulhead. Something that
requires a 1/2" hole and takes a 1/4" hose ID hose wouldf be good. Airplane
bulkheads are too small and I don't like the silicone and hole idea. The
best idea I have is to epoxy a pipe splice into the hole.

Any better ideas.