| VACUUM |
GRAVITY |
| Flexibility - in
case layout and arrangement for new construction or remodeling |
Case layout is limited to where floor sinks
(drains) are located. Flexibility is limited. |
| Eliminates the cost of
under-slab wastewater piping. Piping system is installed overhead.
Does not require venting |
Drain lines are installed beneath concrete
slab. Requires venting. |
| Installation costs are
reduced using smaller diameter plastic pipe fittings. Floor drains
are eliminated. |
Uses standard drainage pipe and fittings. Requires
floor drains and cleanouts. |
| Remodeling time is reduced.
No concrete cutting and trenching. |
Remodeling requires costly concrete
cutting, trenching and drain relocation. |
| Leaking pipes. Air will
enter waste piping. No wastewater leaks. |
Leaking pipes. Wastewater will exit waste
piping causing potential ground damage. |
