CO2 in pressure barrel

[Fozzy Beer]

Upto now have only used bottles

If I use plastic barrel and say draw at rate of 5L (10 bottles) per week, how many/how often should I top up with CO2?

1 8g bulb per 500ml draw/1 per day opening?

If I barrel stout would N2 bulbs make a difference to the head?

[woblylegs]

ill be honest with you, i use 70-80g of sugar in 23 litre to prime my cheapo keg and very rarely need to inject it with the co2 bulb. i think ive used 3 bulbs in as many years.

[Maltmaniac]

If you have no leaks then with 80gr of sugar for priming you should manage to drive at least half the keg off without the need for a gas injection and on many barrels more than that. If you are finding that amount of gas is required I would say you have a leak somewhere. Storage temp does make a difference and if you draw off the half the keg in one night it could need a charge, but otherwise I've found them very easy to get on with. One tip is keep a few bottled beers handy, I reckon about 200 pints is about enough, and then just give the old PB time to plump up before pouring the next one.