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I'm refinishing my basement and I don't want to place a drain in the floor. But I need a place for the HVAC condensation to drain to, and a place for the water heater pressure relief to drain to.
Option 1, there is a nearby soil stack. I'd like to Tee off of that and add a P-trap, but city says I can't because there's no vent.
Option 2, there is a sump (with a pump) nearby. I'd like to drain to that but the city says no (not an "approved" method whatever that means)
Suggestions?
In the 2015 International Plumbing Code, R504.6 explains the requirements for hot water heater discharge pipe. It looks like you could install something similar to a clothes washer standpipe as long as the hot water heater discharge terminates less than 6" and more than 2x the pipe diameter above the standpipe. By the way, #6 "not to be trapped" refers to the pipe connected to the hot water heater, not the standpipe or floor drain.
They make condensate pumps for handling your condensate from your HVAC (Search for condensate pumps). This allows you to run your waste water to an available drain. I suspect that you won't be able to find one large enough to handle worst case full open pressure release from your water heater, but it should be enough to handle the typical trickle that results from a normal over temperature / pressure situation.
