"Rudy" wrote in message
...
There is no floor drain or open sewer line/vent. In fact the sewer line
from upstairs goes out to the outside at the ceiling level of the
basement.


You say that both the HW tank and HVAC air handler are in the basement.
What provision was made for the HW tank leaking and the condensate "drip"
from the AC. Surely there is some sort of drain there ?

The hot water tank just happens to be next to a sump pump pit. Under the HW
tank there is a plastic pan to collect any small leaks, and a short hose
from that pan goes to the sump pump pit. The HW tank also has a pressure
relief valve and a tube that go down to near the floor. In the case of the
pressure relief valve being opened up, it would just empty onto the basement
floor near the sump pump pit.

The HVAC has a condensate pump that automatically pumps the condensate drip
up through a clear plastic tube and out through the side of the house where
the outside condenser is located, and that just drips out onto the ground
outside.

I have several houses where the HW tank and HVAC are set up the same way --
some with sump pumps in the basement and some without, and all without any
floor drain in the basement.