Mark, I have a 16 foot long sink made out of ½ marine ply wood with an epoxy paint. The depth is 9 inches in front and sides and 20 inches in back. I have a tempered line with 4 values and one cold and one hot line. I only have the one drain line, but do with I?d put in another and sometimes think about just adding one for the direct chemical dump to help keep the tray bottoms a little cleaner. My washer sits outside of the sink. It is wide enough to hold a 30x40 tray or about 37?. It can easily handle a for run of 20x24 trays with holding and hypo clean all in the same set up; a total of 7 trays. The seam of the sink is just a lap joint and the sides were set in channels for an interlocking set up. The base is made of some 2x4 and some 1x4. It has been working fine for 8 years, but I could put a fresh coat on as some wear is starting to show. Eric Neilsen Photography 4101 Commerce Street Suite 9 Dallas, TX 75226 http://e.neilsen.home.att.net http://ericneilsenphotography.com Skype ejprinter _____ From: pure-silver-bounce@xxxxxxxxxxxxx [mailto:pure-silver-bounce@xxxxxxxxxxxxx] On Behalf Of Mark Blackwell Sent: Saturday, February 10, 2007 3:16 PM To: pure-silver@xxxxxxxxxxxxx Subject: [pure-silver] Building sink again Well finally construction of my darkroom sink is about to begin. I think I have a handle on all the plumbing and drain issues with flexible hose being used to get the drain around a washer with a couple of plan B's if there is trouble. One thing I haven't figured out just yet is how deep is really best?? Too deep and it might be akward to work in, but too shallow is just a big mess waiting to happen and like history it would just be repeated every time you use the darkroom. Also I plan on painting it. Natural finish in the room would be out of place. Now sealing the plywood now likely is a fiberglass project on top of the regular plywood to keep it sealed against the water both for long life and no leaks. Maybe there are better ways to seal it using paint and Id welcome those ideas. It should be big enough for at least 3 16x20 trays and I am hoping to be able to build a print washer in the space that's left that can be place in when needed and removed and stored when not needed that would fit over the drain at one end. Any ideas on how to do that would also be welcome. One other thought hit me. Though there will be a slight slope toward one end for the drain, anyone ever put more than one drain in it and would that be of an advantage or just wasted time and effort. My gut tells me one would be plenty. Also plan on taking the suggestion of covering the top of the plywood with another piece of wood that I will use a round over bit on for comfort and it would provide extra protection from water getting to the weakest spot of the plywood. Also I am looking for some kind of in line themometer that I can plumb into the system. I am guessing that if I don't I will regret it later, though I have worked without it for years. Thanks in advance for all the help past and present. Id welcome any and all suggestions and things you would have done differently if you had to do it over again with what you know now. Mark _____ Get <http://us.rd.yahoo.com/evt=49678/*http:/smallbusiness.yahoo.com/domains/?p= BESTDEAL> your own web address. Have a HUGE year through Yahoo! Small Business.