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Vacuum
Assist
This is the latest flush
innovation. The porcelain tank contains a vacuum tank
that’s connected to the trapway (the large tube that carries
water out of the bowl). When the toilet is flushed, water flowing
out of the tank creates suction in the vacuum tank and trapway to
help suck waste out of the bowl.
| Pros: |
| •Easy repairs. Vacuum-assist toilets use the same type of
fill and flush valves as gravity models, so they’re
simple to repair. •Strong flush. Vacuum-assist toilets do well in lab tests. In clearing solid waste, they outperform most gravity types, but don’t do as well as many pressure-assist models. •No sweat. Like pressure-assist models, vacuum-assist toilets store water in an inner tank, so condensation won’t form outside the porcelain tank. |
| Cons: |
| •Cost. Starting around $180, vacuum-assist models cost
slightly more than some gravity models. •Limited choices. There are currently only two vacuum-assist toilets from major manufacturers: Briggs’ Vacuity (www.briggsplumbing.com, 800-888-4458) and Crane’s VIP Flush (www.craneplumbing.com, 800-877-6678). |
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