Kitchen sink drain temperature rating

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gzt

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#300558 18-Sep-2022 12:21

Is the standard current NZ kitchen trap and drain pipe rated for boiling water?

Older pvc sink traps I think definitely not.

The stainless steel sink conducts some of the temperature away. In practical terms can I drain pasta directly into the sink or should I use an intermediate pot or bowl in the sink as I mostly do?

k1w1k1d

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#2969703 18-Sep-2022 12:35

I usually turn the cold tap on and slowly tip the boiling water into the cold stream.

Jase2985

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#2969707 18-Sep-2022 12:53

this would usually apply for most drains

Temp range: All Marley drains, wastes and vents are suitable for the continuous discharge of liquids at temperatures up to 60°C for vertical pipes and grade pipes, as well as intermittent discharges of liquids up to 90°C where the duration of the discharge does not exceed 90 seconds

gzt

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#2969745 18-Sep-2022 15:24

The S bend will retain water for a long period. Technically that's equivalent to a discharge longer than 90 seconds.

Bung

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#2969752 18-Sep-2022 15:38

Dux say their polypropylene traps can be sterilised with steam and in absence of stress can cope with 150⁰C.

I've been dumping the pasta and rice water in the sink for ages and the sky hasn't fallen.

Eva888

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#2969773 18-Sep-2022 17:15

Pasta water straight in the sink for many years through older pvc pipes. Boiling water straight in when a sink blockage. All good so far. Rice I use the absorption method, it’s far tastier.