D.C. Mun. Regs. tit. 12, r. 12-F802
Strike Section 802.3 of the International Plumbing Code in its entirety and insert a new Section 802.3 into the Plumbing Code in its place to read as follows:
Waste receptors. Waste receptors shall be of an approved type. A removable strainer or basket shall cover the waste outlet of all waste receptors. Waste receptors shall be installed in ventilated spaces. Waste receptors shall not be installed in bathrooms, toilet rooms, plenums, crawl spaces, attics, interstitial spaces above ceilings and below floors or in any inaccessible or unventilated space such as a closet or storeroom. Ready access shall be provided to waste receptors.
Exception: Clothes washer standpipes shall be permitted in bathrooms in dwelling units.
D.C. Mun. Regs. tit. 12, r. 12-F802