RU130EP Installation and Operation Manual

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Rinnai Tankless Water Heater Installation and Operation Manual 41

This conguration requires the use of a Concentric Vent

Termination

2 in. or 3 in. PVC/

CPVC IPEX/ Royal

Concentric Side Wall

Termination Conguration

This conguration requires the use of a Concentric Vent

Termination

2 in. or 3 in. PVC/CPVC

IPEX/ Royal Concentric Vertical

Termination Conguration

2 in. or 3 in. Schedule

40 PVC/CPVC or ABS Snorkel

Termination Conguration

2 in. or 3 in. Schedule 40

PVC/CPVC or ABS Standard

upside down “U” Vertical

Termination Conguration

2 in. or 3 in. Schedule

40 PVC/CPVC or ABS Elbow

or Tee Side Wall

Termination Conguration

2 in. or 3 in. Schedule

40 PVC/CPVC or ABS Tee

Vertical Termination

Conguration

2 in. or 3 in. PVC

Low Prole Termination

Conguration

Exhaust and

combustion air

MUST NOT be

brought together

into a single

PVC pipe using

a pipe tting.

1. Direct Vent (Twin Pipe)

Twin Pipe Example Vent Applications

Slope horizontal exhaust 1/4 in. per foot towards the water heater. DO NOT slope combustion air pipe

towards the water heater.

Single

Pipe

Combustion

Air

Exhaust

Twin Pipe Maximum Vent Length

Table 16:Twin Pipe Maximum Equivalent Length

Vent Sizes 2 in. (51 mm) 3 in. (76 mm)

Vent Lengths 65 ft (20 m) 150 ft (46 m)

• 45° elbow is equivalent to 3 ft (1 m)

• 90° elbow is equivalent to 6 ft (2 m)

Table 15: Twin Pipe Example Vent Applications

WARNING

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Installation and Operation Manual - Page 41