The first would be a bathroom or kitchen in that part of the house and the other would be a pressurized drain system with pipes.
Draining pipe going in attic.
Any pipe trough to the attic it call ventilation pipe they are design to pressurize the drain system and exit of the bad gases by entry of the air trough to those pipe water in drain pipe will go.
When installing your vents it s highly recommended that you plan out your drain lines to minimize the risk of clogging.
Placing water pipes in outside walls greatly increases the risk of frozen and burst pipes in cold.
There are some systems that utilize a pump rather than a drain.
When running pipe from a slab to an attic use cross linked polyethylene tubing or pex instead of copper.
It happens because the vent pipe sticking through the roof gets as cold as the air temperature.
Watch this video to find out more.
A clog in the drain line of an attic ac unit is a homeowner s worst nightmare.
A catch basin is a buried box with a grate on top and openings for underground pipes to connect.
A powerful wet dry vac and proper hose attachment can take care of most jobs.
If the water is collecting in puddles you can put a catch basin in the center.
Surface water runs into the catch basin and is routed away in buried drainage pipes.
If the air temperature is cold enough outdoors the water vapor traveling up the pipe can freeze right to the sides of the pipe.
A french drain also routes water away underground by allowing it to flow through a gravel filled trench.
This will kill any algae mold or mildew that has formed in the pipe.
Just pour a cup of bleach in the drain line s access opening near the indoor air conditioning unit.
Both kitchen 1 1 2 inches and bathroom 1 1 4 inches are smaller than the rest of the drain system on purpose.
The use of tec vent in return air plenums shall be allowed only in engineered drainage systems designed by a design professional and approved by the local authority.
It can potentially cause extensive and expensive water damage.
Luckily it is usually easy to clear out a clog.
Moving plumbing pipes from a slab to an attic use pex pipe.
They lead into larger branch drain pipes which lead into the 4 inch stack.
Only two plumbing set ups could require sewer pipes in the attic.
One is the primary condensation drain pipe where the water should continuously drain the condensation during the cooling season and in the winter.
The ice buildup is the same temperature as the air temperature.