33 CFR § 159.87
Removal fittings
August 2, 2023
§ 159.87 Removal fittings.
If sewage removal fittings or adapters are provided with the device, they must be of either 11⁄2″ or 4″ nominal pipe size.
If sewage removal fittings or adapters are provided with the device, they must be of either 11⁄2″ or 4″ nominal pipe size.