Help please

[cduphily]

RNC (rigid Non-Metallic Conduit) utilized for ac condensate drain - I need to prove RNC is not rated for a drain application.

I can't find the damn spec sheet for some reason.



and...

[Joe Funderburk, CMI]

This is all I have on it:

"IRC M1411.3.2 Drain pipe materials and sizes. Components
of the condensate disposal system shall be cast iron, galvanized
steel, copper, polybutylene, polyethylene, ABS,
CPVC or PVC pipe or tubing. All components shall be
selected for the pressure and temperature rating of the
installation. Condensate waste and drain line size shall be
not less than 3/4-inch (19 mm) internal diameter and shall not
decrease in size from the drain pan connection to the place
of condensate disposal. Where the drain pipes from more
than one unit are manifolded together for condensate drainage,
the pipe or tubing shall be sized in accordance with an
approved method. All horizontal sections of drain piping
shall be installed in uniform alignment at a uniform slope."

[James H. Bushart]

Why would you need to "prove" that an electrical item being used for something for which it was not designed to be used for (a violation of NEC 2005 103B) is improper?

[Michael Larson]

Does anyone see a real problem with this installation?

The NEC doesn't apply as it is not an electrical installation.

[cduphily]

Originally Posted by jfunderburk

This is all I have on it:

"IRC M1411.3.2 Drain pipe materials and sizes. Components
of the condensate disposal system shall be cast iron, galvanized
steel, copper, polybutylene, polyethylene, ABS,
CPVC or PVC pipe or tubing. All components shall be
selected for the pressure and temperature rating of the
installation. Condensate waste and drain line size shall be
not less than 3/4-inch (19 mm) internal diameter and shall not
decrease in size from the drain pan connection to the place
of condensate disposal. Where the drain pipes from more
than one unit are manifolded together for condensate drainage,
the pipe or tubing shall be sized in accordance with an
approved method. All horizontal sections of drain piping
shall be installed in uniform alignment at a uniform slope."

Thanks Joe unfortunately I have that .... still looking for the approved applications of RNC. I know I've read and been told by plumbers/electricians alike that it is a no-no now I need the documentation to prove it.

[Michael Larson]

I'd be more concerned with the lack of an anti siphon vent tee and riser.

[cduphily]

Originally Posted by mlarson

Does anyone see a real problem with this installation?

The NEC doesn't apply as it is not an electrical installation.

pvc glue can not make a permanent water tight seal when used on RNC (so I've been told numerous times over the years. It's always been taboo to my knowledge. If I'm wrong that's fine ...but I would like to find viable proof either way.

[cduphily]

Originally Posted by mlarson

I'd be more concerned with the lack of an anti siphon vent tee and riser.

That isn't an issue because it was already stated in the report and understood by all parties.

[Michael Larson]

Originally Posted by cduphily

pvc glue can not make a permanent water tight seal when used on RNC (so I've been told numerous times over the years. It's always been taboo to my knowledge. If I'm wrong that's fine ...but I would like to find viable proof either way.

I agree that what ever solvent is used it must be compatible with both materials but there are solvents for this purpose.

[Michael Larson]

Originally Posted by cduphily

That isn't an issue because it was already stated in the report and understood by all parties.

Sorry.

[Brian A. MacNeish]

Originally Posted by mlarson

I'd be more concerned with the lack of an anti siphon vent tee and riser.

Yep!!!

[cduphily]

Well, after talking to 2 LICENSED electricians (licensed through a bordering state) and 1 LICENSED Plumbing contractor - they agree with Brian, they know of no codes/documentation to prevent it but they discourage doing it.
I'm just a deal killer I guess ....well in this instance a hindrance to close escrow seeing as though my client bought the home anyway.

Feel free to throw your 2 cents into this.

[Bob Elliott]

Are the pipe and connectors different types of plastic ?, as that may be a problem.
May require different adhesives?

[Speedy Petey]

I'm not sure why you are even asking electricians. As Michael stated, this is NOT an electrical issue.

Your answer is right here:

All components shall be
selected for the pressure and temperature rating of the
installation.

Electrical conduit is not rated for pressure so that would preclude it from being used.

I agree, this is not a big deal, but it is not compliant.

[Erby Crofutt]

Did you think about contacting the manufacturer of the RNC?