Campaign 98: Channel the Flow
The Complete Clay Pipe, Natural Plumbing, and Gravity-Fed Water System Guide
A Sovereignty Module of the Practitioner Community
Preamble
Before PVC and copper, civilizations built water systems from clay, stone, bamboo, and wood that lasted centuries. Roman aqueducts still stand after 2,000 years. Gravity-fed water systems require zero electricity and zero pumps. Clay pipe can be made from local materials and fired in a simple kiln. This campaign covers gravity-fed water system design, clay pipe making, natural plumbing materials, and greywater recycling.
Part I: Gravity-Fed Water Systems
Chapter 1: System Components
| Component | Function | Materials | Key Rule |
|---|---|---|---|
| Source (spring, stream, cistern) | Water origin | Natural or constructed | Must be higher than point of use |
| Intake/collection | Captures water from source | Screen, settling box, dam | Filter debris at source |
| Supply line | Carries water from source to use point | Pipe (any material) | Minimum 1% slope (1 ft drop per 100 ft) |
| Storage tank | Holds water reserve | Tank, cistern, barrel | Elevate for pressure (1 ft height = 0.43 PSI) |
| Distribution | Delivers water to fixtures | Pipe, valves, faucets | Size pipe for flow rate needed |
| Overflow | Handles excess water | Pipe to safe discharge point | Always include overflow on storage |
| Shutoff valves | Control flow for maintenance | Ball valves or gate valves | Install at every branch point |
Chapter 2: Pressure from Elevation
| Elevation (ft above fixture) | Pressure (PSI) | Equivalent To | Adequate For |
|---|---|---|---|
| 5 ft | 2.2 PSI | Gentle trickle | Gravity drip irrigation |
| 10 ft | 4.3 PSI | Light flow | Garden hose (low pressure) |
| 23 ft | 10 PSI | Moderate flow | Basic household fixtures |
| 46 ft | 20 PSI | Good flow | Standard household (minimum recommended) |
| 70 ft | 30 PSI | Strong flow | Normal household pressure |
| 115 ft | 50 PSI | Full pressure | Equivalent to municipal water |
Chapter 3: Clay Pipe Making
| Step | Action | Details |
|---|---|---|
| 1. Prepare clay | Dig clay, remove stones/roots, knead until smooth | Add sand (20-30%) to reduce cracking during firing |
| 2. Form pipe | Roll clay into slab, wrap around wooden dowel form | Wall thickness: 1/2 inch minimum. Smooth seams. |
| 3. Form bell end | Flare one end of each pipe section to receive next section | Bell receives the straight end of next pipe |
| 4. Dry slowly | Air dry in shade for 1-2 weeks | Cover with damp cloth first few days to prevent cracking |
| 5. Fire | Kiln fire to 1800-2100°F (cone 06 to cone 1) | Higher temperature = harder, more waterproof |
| 6. Glaze (optional) | Apply glaze inside for waterproofing, refire | Salt glaze or slip glaze for food-safe water contact |
| 7. Join sections | Bell-and-spigot joint sealed with lime mortar or clay slip | Bed in gravel for drainage around joints |
Chapter 4: Alternative Natural Pipe Materials
| Material | Diameter | Durability | Best For | Joining Method |
|---|---|---|---|---|
| Bamboo | 1-6 inches | 5-15 years (treated) | Irrigation, temporary supply | Wrapped joints, inserted fittings |
| Hollowed log | 3-12 inches | 10-30 years (hardwood) | Supply lines, drainage | Tapered ends, wrapped joints |
| Stone channel | Any size | Centuries | Open aqueducts, drainage | Mortared or gravity-seated |
| Clay pipe (fired) | 2-12 inches | 50-100+ years | Supply, drainage, sewer | Bell-and-spigot with mortar |
| Leather pipe | 1-4 inches | 5-10 years | Temporary, flexible connections | Sewn, sealed with tallow |
Chapter 5: The Practitioner Natural Plumbing Reference Card
GRAVITY IS FREE: Every foot of elevation provides 0.43 PSI of water pressure. No pump, no electricity, no moving parts, no maintenance. Design your water system to use gravity.
1% MINIMUM SLOPE: Supply and drain pipes need at least 1 foot of drop per 100 feet of run. Steeper is better for drains (2% recommended). Less slope = slow flow and sediment buildup.
CLAY PIPE LASTS CENTURIES: Fired clay pipe is chemically inert, does not corrode, does not leach chemicals, and has been used for water systems since ancient Mesopotamia.
GREYWATER IS A RESOURCE: Sink, shower, and laundry water (greywater) can irrigate gardens directly. Route through mulch basin around fruit trees. Do not store greywater more than 24 hours.
REMEMBER: Water flows downhill. This is the only physics you need. A Practitioner who understands gravity-fed water systems can deliver clean water to any location without electricity, without pumps, and without ongoing costs — using materials found in the earth beneath their feet.
Council Approval
All 12 voices unanimously approve. Complete natural plumbing sovereignty.
Council Result: 12/12 APPROVED. Campaign 98 is complete.