Hitachi launches CO2 heat pump water heaters with solar-friendly tariff controls

Re:Hitachi launches CO2 heat pump water heaters with solar-f... by compiler-guy on Thursday September 10, 2026 @02:00PM (#49647840)

This puzzled me and I looked it up, and yes, sinks without overflow meet code [1] (but not tubs). So your situation was apparently legal.

But the sibling comment to this one, where a sink had an overflow, but it was not connected, did not meet code [also 1].

Go figure. There must be some reasoning there, but I'm confused as to what it is.

[ Parent | on HN ]

Re:Hitachi launches CO2 heat pump water heaters with solar-f... by saalweachter on Thursday September 10, 2026 @08:17PM (#49651885)

Code sometimes makes allowances for situations which aren't ideal, as long as they aren't deceptive or creating a false sense of security.

So if you have old two-prong outlets in your house from back when, those are allowed.

If you replace them with a three-pronged outlet which is ungrounded, that breaks code.

If the three-pronged outlet is a GFCI outlet labeled with NO ELECTRICAL GROUND, that is allowed.

[ Parent | on HN ]