4: 3/5 Concentric To Twin Pipe Adaptor; 5: Applying Lubricant To Gasket - Rinnai RU80i Manual

Adaptor Installation (continued)
STEP 4:
Use PVC to Polypropylene Eccentric Increaser
(supplied with the adaptor) to transition from PP to
PVC 3"; additional PVC/CPVC bushing, or other type
of reducing fittings is required to transition to 4" pipe.
Figure 4: 3/5 Concentric to Twin Pipe Adaptor
STEP 5:
Apply lubricant to the gasket surface and coupling with
finger prior to component attachment (refer to
installation examples Figure 5 below). To make the
insertion of the gasketed fittings into the PVC coupling
easier, Centrocerin gasket lubricant is recommended
(supplied with adaptor in box).
Figure 5: Applying Lubricant to Gasket
For further details on listed PVC/CPVC venting
material (Table 2) and proper handling and
installation (e.g. priming, gluing etc.), refer to the
installation manual of the respective PVC/CPVC
manufacturer.
Use only water or Centrocerin lubricant for lubricating
the gaskets and pipe ends to allow easy insertion of
fittings onto the vent adaptor. DO NOT use any other
brand of lubricant as it may cause deterioration of the
gaskets, which could result in leakage of dangerous
flue gases into the occupied space. If disassembly
of vent pipes are required after the gasket has dried,
wet joints thoroughly with water to loosen the
connection.
Follow vent manufacturer's instructions for
additional venting installation instructions, to avoid
situations that can lead to property damage, personal
injury, and/or loss of life.

DO NOT use solvent cement that has become
curdled, lumpy, or thickened.

DO NOT thin solvent cement. Observe
precautions printed on the containers.

Use appropriate temperature-type solvent
cement for applications below 32°F.

Appropriate solvent and cleaner must be used
for the type of vent pipe used (PVC, or CPVC).
13
NOTICE
WARNING
WARNING
CAUTION