I need a cad drawing for a water heater pan mounting detail for cad. Where can I get some details from.

Why don't you just draw one up?  How long could it take?  A pan?It's basically a round cake pan with a plug on one side for draining.  Probably take less than 60 seconds to draw the profile and a split second to either do a REVSURF or an EXTRUDE.  Punch a hole in it and your done. 
John Connor2014-01-25 23:48:06

John this water heater is being mounted above a mop basin. So the detail needs to show some mounting bracket or what ever might be necessary. Come on John send me something.   

What size water heater?  I've seen them mounted on what is basically a tray bolted to the wall and supported off the front end by a tie-back at each corner.  A search of water heater pans or trays is certain to pull up an image of one.  Not a difficult concept to model.http://www.amazon.com/Holdrite-QuickStand-40-SWHP-W-Suspended-Platform/dp/B00662ONJA
John Connor2014-01-26 12:48:36

Ray: I'm going to have to charge you for finding this and that's only because it was so easy to find I don't see how you could have missed it.A link to the Holdrite website where you can download a 3D drawing of the wall mounted platform for a water heater.http://www.holdrite.com/products/water_heater_accessories/quick_stand/40-SWHP-WMNow all you need do is extract the 2D views.  Life is grand isn't it?John Connor2014-01-26 13:07:03