Upward mounted TPR valve

[Sylvan]

That's problematic if the WH is in the basement, and the discharge would have to go up to get to daylight! Admittedly, basements are rare in some parts of the country.

NYC is blessed with hundreds of thousands of "basements" and all have a boiler (s) or HW tank or a indirect line to an unfired tank

The one telltale difference is the level this space is on. A true basement is below grade and can be half a level above the street. A cellar, on the other hand, is below ground. A basement may have windows. A true cellar will not have any windows.

Knowing I cannot have a T&P, Safety or a Relief valve discharge above it.

The options are place the discharge above a floor drain or a cooling pit for steam prior to discharging it into the public sewer system

The picture is a boiler we installed well below ground BUT above the city sewer and we brought in free air for combustion with a "fan in a can" as a regular size opening will allow mongrels to bust into the ware house and steal everything not welded down

Combustion Air System, 325cfm, Gas

 

[Sylvan]

2 Stories below street level and the basement and sub basements have floor drains connected to the public sewer

3 stories below we installed several Federal sewer ejectors pumping up to the subbasement

 

[Sponsor]

 

[Reach4]

Here, the discharge line almost ALWAYS has to discharge to the exterior of the building.

But never when you were in Chicago, for fear of freezing.
I wonder what they do in the 7000 ft elevations in AZ.

 

[Jeff H Young]

But never when you were in Chicago, for fear of freezing.
I wonder what they do in the 7000 ft elevations in AZ.

Cold weather likely a mechanical room with floor sink or drain. likely they do something different in Florida , most of the homes have them in garage today I believe single family detached is all I've seen there in my travels My Dad built several customs and I've been in a number of slab on grade homes there . t and p guessing on floor or outside like CA

 

[Sylvan]

But never when you were in Chicago, for fear of freezing.
I wonder what they do in the 7000 ft elevations in AZ.

The only time I ever had pneumonia was in Great Lakes Illinois Sept boot camp was FREEZING