The brochures for the year of your camper has this info.
See here
Sunline Coach Owner's Club - Sunline Owner's Files - 1994 Sunline
The "FILES" tab on the top of the forum is a button. Click it and it opens up lots of good Sunline stuff.
According to the brochure, your 94 T2370 has:
30 gallon fresh water "system"
25 gallon gray tank
25 gallon black tank
On the fresh water "system" that means the entire system, pipes, hot water heater and the fresh tank.
So figure this:
30 gal system
- 6 gal. hot water heater
- approx 3 gallon piping and pump
-----
approx 21 gallon fresh tank size.
Hope this helps
John
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Current Sunlines: 2004 T310SR, 2004 T1950, 2004 T2475, 2007 T2499, 2004 T317SR
Prior Sunlines: 2004 T2499 - Fern Blue
2005 Ford F350 Lariat, 6.8L V10 W/ 4.10 rear axle, CC, Short Bed, SRW. Reese HP trunnion bar hitch W/ HP DC
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