Installation Instructions

August 6,
2008
Fernco Donuts
sewer pipe compression joint sealers.
Fernco Donuts
are flexible PVC donut-shaped rings for
compression sealing of sewer pipe joints and
drain waste and vent connections such as
sockets, hubs, bells, and spigots. They offer
all of the properties necessary to create a
good, lasting joint.
Fernco Donuts are made from strong,
resilient, chemical-resistant elastomeric PVC
specially formulated for use as a sewer joint
material. Because of the inertness and
chemical resistance of the material, Fernco
Donuts are impervious to soil conditions,
sewage and water in the carrier pipes, and to
normal sewer gases.
In fact, its combination of compressibility, resiliency, chemical and fungus resistance, and
ultraviolet stability create a superior joint!
A bearing surface is provided by filling the annular space (between the pipes being joined)
with the donut. This supports the spigot and distributes the earth load over a larger area of
the external pipe.
The donut is designed to provide several
points of seal in order to accommodate
possible irregularities in the pipe surfaces. If
one seal point iss disturbed, the others will
maintain the seal.
The design and elasomeric material of the
Fernco Donut both contribute to sewer joint
permanence even under common conditions
of ground movement and expansion and
contraction of the pipes themselves.
Sewer pipe companies do not manufacture
their pipe to common dimensional standards.
Instead, pipe is produced to the designs and
dimensions best suited for each particular
sewer system. Because of this, variations in
dimensions of pipe bells, hubs and bores are
simply too great to permit making a single
universal connector.
How to Order
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