EPIC Chambers

The EPIC chamber is the manufactured part at the heart of every cell. It is a single-piece injection-moulded polypropylene arch that moves water, or gas, through sand, gravel and other porous materials in either direction, on gravity and capillary action alone, with no emitters and no moving parts.

The sheet sets out what one chamber does. It irrigates from below the root zone at low or zero pressure, it drains and harvests when the flow is reversed, and it carries greywater and treated effluent while keeping the bed aerobic. A further list records other documented uses, from non-plugging drainage and leach fields to oil and water separation and grain drying.

A page on the double wall explains why a single-wall arched chamber fails in saturated sand, and how offset openings in the outer and inner walls, with the cavity between them, form a gravity trap that lets water through and holds sand back. It also covers the integral end-wall ports and why the two sizes substitute one for one on the same header layout.

The final page is the specification table for both sizes, with patent references, a note on material and performance, and a note for the specifier on the advantages of the smaller SM24. Installation is outlined in four moves: line, set, envelope and cover.