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There are 14 entries in the glossary.| Pages: 1 |
| Rated Storage Volume | Quantity of water stored in a tank. |
| Reamer | A grinding tool used to level or remove burrs from valve seats in faucets so that the valve stem will fit properly. |
| Recovery Capacity | The amount of water in gallons per hour raised 100 degrees F at a given thermal efficiency and BTU per hour input. |
| Reducer | A fitting that connects pipes of different sizes together. |
| Return Circulation System | Tempered water from or near the point of usage which eliminates waste of hot water used for long runs and adds storage to the system. |
| Revent | Pipe installed specifically to vent a fixture trap. Connects with the vent system above the fixture. |
| Reverse Trap Water Closet | A water closet having a siphonic trapway at the rear of the bowl, and integral flushing rim and jet. |
| Rigid Pipe | Pipe designed to transmit the backfill load to the foundation beneath the pipe. Rigid pipe must be supported on the bottom portion of the pipe. |
| Rim Holes | A series of small holes in the underside of a toilet rim, around the circumference of the bowl. Incoming water flows down into the bowl through these holes, creating a rinse effect or wash over the entire inner surface of the bowl. |
| Riser | A vertical metal or plastic tube or assembly that connects a faucet to the water supply stop valve. Usually made of copper. Metal Flex Risers are corrugated to facilitate bending. Also a supply line that rises from one story to the next. |
| Roof Flashing | Sheet metal installed at any break in a shingled roofline to prevent leaks. Also around sewer vents, fluepipes. |
| Rough-In | Installation of the drain, waste, vent, and supply lines in a structure to the proposed location of each fixture. |
| Rough-In Dimensions | The distance from a finished wall or floor to the center of the waste or supply opening or mounting holes on a plumbing fixture. |
| Run | A complete or secondary section of pipe that extends from supply to fixture or drain to stack. |
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