Discharge Tube Installation

Users who are viewing this thread

Roback

Member
Messages
47
Reaction score
1
Points
8
Location
Los Angeles, California
I have a water heater in a closet with an exterior wall. Never had a discharge tube. Just a pan with outside 90. Having the house re stucco and want to install outside 90 from the TRV. Small closet so trying to avoid soldering inside room! Also, I want to make it easy to remove if get a new heater so thinking of using dielectric unions on valve as well as on vertical and nipple that can run to outside 90. Is it okay to use unions for this? If so, other than at valve which I imagine I would use Teflon, would I use dope on the other unions? Would I be better off using CPVC? Also, the 90 would be about 18 inches or so off ground outside like Pan discharge, as heater inside is on a platform. Any advise appreciated.
 

Reach4

Well-Known Member
Messages
38,798
Reaction score
4,412
Points
113
Location
IL
I think there was some agreement on that thread that copper or galvanized would be better, but if used, CPVC should be 1 inch, and still suspect as to whether it is rated to high enough temperature. That adapter that was referenced there appears to keep the CPVC from being right at the water heater. The pipe in your non-freezing area should go to 6 inches above the ground and be in a spot that is observable.

I am confident that dielectric unions would be fine. You could do everything in galvanized with non-dialetric unions too. I think dielectric unions are useful when transitioning between steel and copper.
 

Roback

Member
Messages
47
Reaction score
1
Points
8
Location
Los Angeles, California
I think there was some agreement on that thread that copper or galvanized would be better, but if used, CPVC should be 1 inch, and still suspect as to whether it is rated to high enough temperature. That adapter that was referenced there appears to keep the CPVC from being right at the water heater. The pipe in your non-freezing area should go to 6 inches above the ground and be in a spot that is observable.

I am confident that dielectric unions would be fine. You could do everything in galvanized with non-dialetric unions too. I think dielectric unions are useful when transitioning between steel and copper.
There's someone for everyone.


Has anyone had experience with the quick connect connectors? Are they any good?
 

DonL

Jack of all trades Master of one
Messages
5,205
Reaction score
72
Points
48
Location
Houston, TX
There is absolutely no need to use a dielectric union for that application.


I do not think it is allowed either.

Is it ? I have CRS.

The discharge line end can not have threads or a easy way to cap it either.

A pro is only allowed for these installs in a lot of places, They should know the local codes.


That is if I understand the California code. Where water and everything else may cause Cancer.
 
Last edited:

DonL

Jack of all trades Master of one
Messages
5,205
Reaction score
72
Points
48
Location
Houston, TX
When they are NOT needed, then a dielectric union is just another union. No regulation about NOT using them.


I thought most of them restricted flow.

My mistake.

Guess I had my HUA.

And my anal flashlight batteries need replaced.
 
Top
Hey, wait a minute.

This is awkward, but...

It looks like you're using an ad blocker. We get it, but (1) terrylove.com can't live without ads, and (2) ad blockers can cause issues with videos and comments. If you'd like to support the site, please allow ads.

If any particular ad is your REASON for blocking ads, please let us know. We might be able to do something about it. Thanks.
I've Disabled AdBlock    No Thanks