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Water System Planner

Plan your fresh and grey water capacity.

Daily Usage
4.7 gal
per day
Recommended Fresh Tank
15 gal
for 3 days
Weight When Full
149 lbs
water + system
Daily Usage
4.7 gal
Fresh Tank
15 gal
Grey Tank
10 gal
Days Off-Grid
3.2
Daily Water Usage Breakdown4.7 gal/day
Kitchen
1.4 gal
Drinking
2 gal
Hand Washing
1 gal
Teeth Brushing
0.3 gal

Quick Start Presets

1 day14 days

Tank Size Comparison

Tank SizeWeight (full)Days Off-GridFills/MonthBest For
7 gal76 lbs1.520.1Basic Sink
15 gal145 lbs3.29.4Weekend
40 gal364 lbs8.53.5Extended

Tips & Warnings

Carrying separate drinking water jugs adds flexibility for refills

Weight Impact

Water (full)
125 lbs
Tanks
9 lbs
System
15 lbs
Total (full)
149 lbs

Empty system weight: ~24 lbs

Water system guideCooking guide
These are estimates based on typical usage patterns. Actual consumption varies based on habits and conditions.
to sync your plan across devices

Ready to Build Your Water System?

Now that you know your water needs, check out the detailed guides.

→Running water — plumbing your van→Cooking guide — kitchen setup options→Bathroom options — toilets and showers→Electrical planner — size your power system→See a complete $10k build with full water system