Where must waste receptors not be installed?

Waste receptors are plumbing fixtures designed to receive waste from various plumbing systems, such as floor drains, sinks, and other fixtures. The placement of these receptors is critical in maintaining sanitary conditions and preventing health hazards. Installing waste receptors in areas like crawl spaces, attics, and interstitial spaces is inappropriate and often against code regulations due to several reasons.

Crawl spaces, while common in some residential designs, may not provide convenient access for maintenance and could lead to foul odors and drainage issues if a waste receptor were to malfunction.

Attics are typically not equipped to handle waste water drainage effectively. They are not designed for frequent human access, which further complicates maintenance and can lead to water damage in the event of leaks.

Interstitial spaces, which are the cavities between building components (such as walls or floors), are not suitable for waste receptors either, as they cannot safely facilitate drainage from waste without risking leakage into other structural areas, which could lead to significant damage and health concerns.

Given that all these locations present various risks and challenges for waste disposal, the installation of waste receptors in these areas is not permissible under the International Residential Code. This is why all the aforementioned areas are deemed inappropriate for waste receptor installation.