On Mon, 10 Jan 2005 17:42:24 -0500, Speedy Jim wrote:

Heater means some kind of space heater?? Central furnace??
Not a water heater, I presume.

If the heater is a gas-fired, hi-efficiency type, maybe the
installer connected the condensate drain to the sanitary sewer
used by that sink. And the combustion blower (more speculation)
is providing the draft pressure you feel at the sink.

It all sounds like a poor/improper installation. Time to go
back to the builder? No satisfaction, see what the FW inspector
has to say.

Jim

I have no gas anywhere in the house, so it's an electric heater...
probably some sort of heat pump I'd guess.

I haven't heard it in a little while, so I'd say it's intermittent.
Hopefully I can reproduce the sound. Contacting the builder may be
the way to go.

- Samiel