I need a coffee barrel of MEU45 Coffee Urn

We do not have parts or any way to access them or look this up. Sorry

Yes, but only from a certified repair shop or a dealer - Mellita doesn't delivers them to anyone else. You will need to contact the company and have it delivered to you.
http://www.melitta.com/customer_service,1057.html

20 cups of coffee needs 2 cups of coffee grounds
30 cups of coffee needs 2 1/2 cups if grounds
40 cups of coffee needs 3 cups of grounds
45 cups of coffee needs 3 1/2 cups of grounds

1 cup brewed coffee = 5 fluid ounces
* use standard measuring cups

Three and a half cups for a full batch

Hi. The spring slips onto the stem just under the coffee basket, it holds the stem with pressure so the perked coffee go up the stem onto the spreader, check repairshack.com Ron

Hi,
I use 1 measuring cup of coffee for each 8 cups of water... this makes a good strong brew...

heatman101

For stronger coffee add three teaspoons for each cup. 75 Teaspoons [US] = 1.562 5 cup [US]

http://www.onlineconversion.com/cooking_volume.htm

I had the same problem. Out of frustration I purchased the DeLonghi 1.5 inch glass knob top and nut and it worked perfectly. For less than $10, my coffee urn has a second life.

You can use a filter if you desire, or if you like finely ground coffee. A normal filter, flattened-out and a small hole torn in the middle will fit into your basket.

Amount of coffee depends on the quantity that you're making and how strong you like it. Suggested amount is 2.5 cups for a 45 (or 42) cup urn, I personally, use 3.5 cups.

use a decalcifier to remove calcium buildup calcium is like concrete dont forget rinse the machine very good after that stuff is very corosif vinergar not strong enought dont forget to rate this cheers.