ASSE Standard #1093-2019(R2023) / WSC Standard PAS-97(2019)(R2023)
Performance Requirements for Pitless Adapters, Pitless Units, and Well Caps
ANSI Approved: March 2023
ASSE 1093-2019(R2023) / WSC PAS-97(2019)(R2023) covers three interrelated devices for creating connections to wells and aquifers: pitless units, pitless adapters, and well caps. The purpose of these devices is to allow for the flow and environmental protection of underground water into the cold water supply to a single or multiple premises. This standard was originally developed by the Water Systems Council (WSC) and was co-developed with ASSE International (ASSE) for the 2019 revision.
A downloadable version of this standard is also available.