drum trap cover

Hi, I had to remove the cover of my 1920s lead drumtrap buy cutting it out with a dremel. I now need a replacement.The old one was brass 3 3/4 inch with fine threads. I can only find coarse thread . The idiots at the box stores and plumbing supply don't have a clue. I need some sugggestions. Thanks Jay -------------------------------------
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ringojbr wrote:

http://www.bicwarehouse.com/3-ips-drum-trap-cover-156-013.html \\
There is also an adjustable cover: http://www.acehardwaresuperstore.com/ace-drum-trap-cover-fits-314-to-4-drum-traps-p-25100.html not fond of them.
If not that, try this: http://www.plumbingsupply.com/testing.html scroll down to the orange test plugs. Big Box will have something at least similar that works.
Jim
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I don't think you are going to find one with threads. Why don't you just use a lead plug and hammer it in lightly?
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better yet replace the drum trap with a standard P trap.
unlike the obsolete drum trap it can be snaked if it clogs....
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