Reference material
Glossary
| Term | Plain-language meaning |
|---|---|
| Accumulator | Pressurized cushion that smooths flow and pump cycling. |
| Backflow | Unwanted reverse movement that can contaminate a supply. |
| Dead leg | Unused or low-flow branch where water stagnates. |
| GPM | US gallons per minute, a flow rate. |
| Grey water | Sink/shower wastewater; exact legal definition varies. |
| Micron | One-millionth of a meter; particle size, not a complete safety claim. |
| NPT | Tapered US pipe thread. |
| Potable | Suitable for drinking when used within its certification/conditions. |
| Pressure drop | Loss of pressure while water flows through pipe/components. |
| PSI | Pounds per square inch, a pressure unit. |
| Shutoff pressure | Pressure where a demand pump stops. |
| TMV | Valve that blends hot/cold to control delivery temperature. |
| Turbidity | Cloudiness/particles that can interfere with treatment. |
| UV dose | UV energy delivered to water; depends on intensity, flow and clarity. |
| Water hammer | Pressure surge from rapid flow change. |