I've been doing some work in the galley on my little boat and thenwondered about why the kitchen and utility room sinks at home havetraps. On the boat the 'grey water' simply goes straight out of ahole in the side with no trap.All the domestic sink wastes I've ever come across simply have anopen ended pipe that discharges into a grid, usually shared with thegutters. So why do they have traps? They're not connected directlyinto the sewers.

The pipework from my sinks goes into a boss on the internal soil/vent stack.

On Mon, 31 Mar 2025 17:53:03 +0100, John Rumm wrote:Of course. Lol.

Why do kitchen sink wastes have traps? FAQ

Mar 31, 2025 Last reply: 1 year ago 23 Replies

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alan_m 1 year ago

But then it would still come out of the overflow hole :)

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Peter Johnson 1 year ago

Of course. Lol.

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Peter Johnson 1 year ago

I'm not going to investigate the situation in the kitchen but in my

1st floor basins the overflow output is above the trap

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alan_m 1 year ago

But we are discussing not having a trap and just putting the plug in.

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