On Jun 3, 9:45*am, Sam Takoy wrote:
Hi,

I have a copper sink in the bathroom and because it doesn't have an
overflow, the water drains very slowly. It is not too much of a problem,
because as the sink begins to fill, it drains more quickly due to
gravity, but as it drains down, the rate slows down dramatically.

But my kitchen sink (as most kitchen sinks) also doesn't have an
overflow, but doesn't have the same problem. How come? Is it because
kitchen sinks have a larger drain?

Thanks!

Sam

Where is the vent for this sink? The overflow is not supposed to
serve as a vent. If the vent is too far away you might look at adding
an inside vent. Lowes has them. Is there a cabinet under the sink?

jamesgangnc wrote in
:

On Jun 3, 9:45*am, Sam Takoy wrote:
Hi,

I have a copper sink in the bathroom and because it doesn't have an
overflow, the water drains very slowly. It is not too much of a
problem, because as the sink begins to fill, it drains more quickly
due to gravity, but as it drains down, the rate slows down
dramatically.

But my kitchen sink (as most kitchen sinks) also doesn't have an
overflow, but doesn't have the same problem. How come? Is it because
kitchen sinks have a larger drain?

Thanks!

Sam

Where is the vent for this sink? The overflow is not supposed to
serve as a vent. If the vent is too far away you might look at adding
an inside vent. Lowes has them. Is there a cabinet under the sink?

In the absence of a vent,wouldn't the sink drain very fast towards the
end, because it is now siphoning? Perhaps more a problem with a lack of
pitch of the line draining the sink, so towards the end the drain line
is full, but doesn't get emptied easily. Sam, is the drain also getting
to drain slowly if you keep the sink full (with some big buckets of
water, or by keeping the tap wide open)? If not, that would perhaps
suggest my guess is right.

--
Best regards
Han
email address is invalid

On Jun 3, 10:37*am, Han wrote:
jamesgangnc wrote :





On Jun 3, 9:45 am, Sam Takoy wrote:
Hi,

I have a copper sink in the bathroom and because it doesn't have an
overflow, the water drains very slowly. It is not too much of a
problem, because as the sink begins to fill, it drains more quickly
due to gravity, but as it drains down, the rate slows down
dramatically.

But my kitchen sink (as most kitchen sinks) also doesn't have an
overflow, but doesn't have the same problem. How come? Is it because
kitchen sinks have a larger drain?

Thanks!

Sam

Where is the vent for this sink? *The overflow is not supposed to
serve as a vent. *If the vent is too far away you might look at adding
an inside vent. *Lowes has them. *Is there a cabinet under the sink?

In the absence of a vent,wouldn't the sink drain very fast towards the
end, because it is now siphoning? Perhaps more a problem with a lack of
pitch of the line draining the sink, so towards the end the drain line
is full, but doesn't get emptied easily. *Sam, is the drain also getting
to drain slowly if you keep the sink full (with some big buckets of
water, or by keeping the tap wide open)? *If not, that would perhaps
suggest my guess is right.

--
Best regards
Han
email address is invalid- Hide quoted text -

- Show quoted text -

Not always. The pipe can be too big to develope a siphon and instead
air is coming up past the water as it goes down. That reslts in slow
water flow. Like what happens if you turn a gallon milk container
upside down.

But I don't dsiagree that a partial clog could be to blame. Because
it is a copper sink I was making the guess (perhaps wrong) that this
is a hall bath and they don't get a lot of use.