Installation Notice for Fernco Donuts
Please be aware that the tolerances of any pipe may be
greater than the effective sealing of this product.
Donuts seal by compression in the annular space between
the pipes being connected. Considerable force (30 psi) must be
exerted on the sealing surfaces during installation of our
compression joints for gravity sewer applications. If the donut
installs with little effort or appears to be loose, contact the
Fernco is providing the best possible donut available
according to the description of the pipes being connected as
supplied by you.
The interpretation of this information is based on
specifications Fernco receives from the various pipe producers.
However, these specifications are often changed arbitrarily
without notifying us.
It is important that you and the installer be aware that this
product may not function as intended due to improper or
insufficient description of the pipes being connected or changes
in pipe dimension or design. We recommend that all
connections be tested before back fill or enclosure. Installations
instructions are available from Yaun Co for Fernco products.