Regarding Basement Installation Plumbing Code Compliance
All Residents in Hamilton Township with Basements
As a reminder, if you have installed plumbing fixtures in your
basement such as a toilet, shower, wash sink, or laundry facilities, you are
required to comply with Section 5.5 Backwater Valves of the Plumbing Code (this
section is provided below) and install a backflow preventer on your drain line
if you meet one of the conditions in Section 5.5.1. Compliance with this
section will help to prevent sewage backups in your basement in the event that
a blockage occurs in the sewer main piping in the roadway. If a backup
does occur and you have not complied with this code requirement, you will be
responsible for any cleanup costs for your basement. Should you have any
questions, please contact Richard W. Watson, Director Department of Water
Pollution Control at (609) 581-4140.
5.5 BACKWATER VALVES
5.5.1 Where Required
a. Fixtures and/or drain inlets subject to backflow and overflow
from blocked or restricted public sewers shall be protected by a backwater
b. Such situations include those where the flood level rim of
fixtures and/or drain inlets are below the overflow level of the first upstream
manhole in the public sewer that will overflow due to a blockage or flow
restriction in the public sewer.
c. Backwater valves shall be installed in drainage piping that
receives flow only from fixtures and/or drains that are subject to backflow
from public sewers.
Other portions of the drainage system not subject to such backflow shall not
drain through a backwater valve.
5.5.2 Material Standard
valves shall conform to ASME A112.14.1 and be installed so that their internal
working parts are accessible for periodic cleaning, repair or replacement.
5.5.3 Notice of the
Installation of Backwater Valves
backwater valves are installed in building sanitary drainage systems, a notice
shall be posted at the building water service shutoff valve(s) describing where
backwater valves are located.