By the flow rate in GPM .. 1 GPM pumped discharge is considered ONE FU .. Normally a fixture unit is one cubic foot of water which is 7.48 gallons.
Fixture can also be used for storm drainage such as a roof and then you have to figure 3 sq ft =1 FU and a combination system one has to use interpolation to size the drainage /waste line
A fixture unit is 1 cubic foot of water (7.48 gallons) If your using pumped drainage /soil system then for every GPM of flow rate one has to consider it as ONE FU
There is no answer as the units are incompatible and therefore not convertible. In plumbing, a Fixture Unit is equal to one cubic foot of water drained in an 1 1/4 pipe over one minute. A Fixture Unit is not a volume or a flow rate unit but a design factor.
A "fixture unit" is used to design the pipe sizes in a plumbing system. It does not equate directly to gallons because not all of the fixtures (aka sinks, toilets, tubs etc etc) will be "running" at the same time. Each fixture is assigned a "fixture unit" load by the local authority having jurisdiction (aka the local plumbing code). These are added to together and tables are used to determine the pipe size. EG, a typical bathroom sink is assigned 1.5SWFU (supply water Fixture units) and 1.5DFU (drainage fixture units) BUT a toilet might be 2.2SWFU and 4DFU.
The drainage fixture units chart provides information on the amount of wastewater a plumbing fixture produces, helping determine the size of pipes and drainage systems needed for proper plumbing design.
How many units are in a rate
well kitchen sinks are set at 2 fixture units and on a 2" drain you can have 4 because horizontal 2" line can have 8 fixtures units and 2" vertical can have 16 fixture units.
That would depend on the fixture units each fixture has and the developed length of the vent piping
3 gpm
What is the condendsate in GPM flow and what tonnage is the unit
It will Carry 10
By developed length and the amount of fixture units attached (1 FU =7.48 gallons) 1 cu ft
That would depend on local codes... I fiqure 2 fixture units and even if the code allow the use of 11/2" diameter pipe I always use 2" MIN.