How many ounces or cups of ground coffee is standard for a Bunn dual dbc to make a 1/2 gallon of brewed coffee?

For 36, six ounce cups of coffee add two cups of perk-ground coffee to the basket. You can make up to 36 cups; however, the West Bend manual suggests that you brew no less than 12 cups. CUPS TO BE BREWED AMOUNT OF GROUND COFFEE TO USE * 36 3 1/2 cups 42 4 cups 48 4 1/2 cups 55 1 pound

Depends on your model. The smaller pour over units are easy as you prep your funnel with coffee as normal and get a full pot of hot water (just brew the water through the brew head and funnel to fill the pot.) If you have another pot or carafe, air pump pot. Then hold the coffee filled funnel (with coffee filter) over the empty pot and slowly pour the hot water over the coffee grounds. Go slow as you don't want to burn your other hand nor get grounds into the pot if you over fill the filter.
* If this is a 1-1/2 gallon brewer then the missing shower head won't mater that much as most of the 'flavor' is extracted in the first 1/2 gallon with the rest just filling the urn. If you do find the coffee to be weak then perform 3 separate 1/2 gallon brews to allow the grounds to fully soak and extract. Again, you can still do it manually as described above but it does get messy and very slow. (I've done this just to get something out to the customer. Well until I could get the repaired brewer up and running.)
* Most of the Bunn decanter brewers use a quarter size screw on spray head. No real substitute, though you could try a stiff sheet of aluminum foil to cover the coffee grounds in the funnel and poke holes into it. Though more than likely one of the waiters will dump it on the next brew.
* On one occasion (during lunch rush) I had to wait on a repaired urn to heat up but the waiter's needed coffee now! I took a pour over small brewer and made a pot with 1/2 gallon strength coffee and poured it into a larger urn then brewed more 'partial' batches till it was full. Hey, got to do what needed to get it out.
* You should always check with your coffee vendor as spray heads are very common parts and available at your local restaurant supply. There are other brands that use the same parts too like bloomfield. Ask around as this is a fairly cheap part.
Aloha, ukeboy57

Remove and clean the spray head above the filter basket. If it still under fills, there could be a problem with the dispense solenoid valve.

Change the membrane. ..bad membrane..

Sounds like a solenoid blockage and or the spray head holes are blocked.

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

look for water leaks around pot. Otherwise do a daytime brew to compare your difference between the amount poured in and what comes out. Please note that less water should mean using less ground coffee. Suggest 1 heaping table spoon per brewed cup.

If you will call 800-286-6070 we can help you with this.

There is a set lock on the timer board, if you've tried that already then check solenoid valve, make sure it works, if yes then problem is timer board.