On-Site Wastewater Treatment and Disposal Systems - Forced ...

TABLE 5-2 (continued)
Total Flow
Reductionh
Water Use
Per Event
gal
Operation and
Maintenance
Application
Considerations
Development
Stagea
Generic Type Description
%
gwd
3 Application largely Periodic maintenance 0.3 14 3
for multi-unit toilet of vacuum pump.
installations
Power use = 0.002 KwH
Above floor, rear per use.
discharge.
Drain pipe may be
horizontal or
inclined.
Vacuum- Similar in appearance
Assisted Flush and user operation to
Toilets conventional toilet;
specially designed
fixture is connected
to vacuum system
which assists a small
volume of water in
flushing.
Varieties: Several.
Requires vacuum pump.
Requires power
Source.
a 1 = Prototype developed and under evaluation.
2 = Development complete, commercial production initiated, not locally available.
3 = Fully developed, limited use, not locally available, mail order purchase likely.
4 = Fully developed, limited use, locally available from plumbing supply houses or hardware stores.
5 = Fully developed, widespread use, locally available from plumbing supply houses or hardware stores.
b Compared to conventional toilet usage (4.3 gal/flush, 3.5 uses/cap/day, and a total daily flow of 45 gpcd)