inWC

inWC stands for "inward Water Closet," a term sometimes used in plumbing and building design to denote a specific type of toilet fixture. It refers to a toilet bowl where the water enters directly from the supply line into the bowl without an intermediate tank. This contrasts with traditional toilets that utilize a cistern or tank to store and release water for flushing.

The primary mechanism of an inWC is a direct flush valve system. When the flush is activated, water is released at a higher pressure and volume directly into the bowl, creating a siphon effect that clears the bowl. This design can offer several advantages, including a more compact footprint compared to tank toilets, potentially reducing installation space requirements. It can also lead to faster refilling times as there is no tank to replenish.

However, inWC systems often require higher water pressure to function effectively, which may necessitate specific plumbing configurations or pressure-boosting devices in some locations. The flushing mechanism can also be more complex than that of a tank toilet, potentially requiring specialized maintenance. While less common in residential settings in some regions, inWC designs are frequently found in commercial buildings, public restrooms, and applications where space efficiency and rapid flushing are priorities. The aesthetic can also be more streamlined, appealing to modern design preferences.