Assembly Instructions

United States
PH: 810-653-9626
FX: 810-653-8714
Canada
PH: 519-332-6711
FX: 519-332-8610
www.fernco.com
DONUTS / O-RINGS
34
07/08
Concrete Manhole Adapters
Help eliminate leaks around pipes entering manhole walls.
Large Diameter CMAs
For sewer pipe that is 8” and larger.
CMAs are exible enough to permit lateral pipe movement without destroying seal
integrity. It is particularly useful for pipe to which concrete will not adhere, such as
plastic pipe.
The CMA is made of elastomeric PVC, is corrosion proof and is unaected by acid or
alkali, however the CMA is subjected to many various conditions that are beyond the
manufacturers control. High ground water tables, quality of grout, workmanship and
eld conditions can aect its ability to seal. Discretion must be used in its application
and installation.
Part No. Description
4 CMA 4” (101mm) I.D. Pipe
6 CMA 6” (152mm) I.D. Pipe
8 CMA 8” (203mm) I.D. Pipe
10 CMA 10” (254mm) I.D. Pipe
12 CMA 12” (304mm) I.D. Pipe
Due to the many varying factors
that can inuence the CMA's
eectiveness as a seal, Fernco
does not warrant this product
as a positive water seal.
LDCMAs are exible enough to permit lateral pipe movement without destroying seal
integrity. It is particularly useful for pipe to which concrete will not adhere, such as
plastic pipe.
The LDCMA is made of elastomeric PVC, is corrosion proof and is unaected by acid or
alkali, however the LDCMA is subjected to many various conditions that are beyond the
manufacturers control. High ground water tables, quality of grout, workmanship and
eld conditions can aect its ability to seal. Discretion must be used in its application
and installation.
Due to the many varying factors
that can inuence the LDCMA
eectiveness as a seal, Fernco
does not warrant this product
as a positive water seal.
Order by specifying the outside
diameter (O.D.) of the pipe which is to
receive the waterstop. Minimum size:
8.5 inches O.D. (55.6mm O.D.)