Noisy sink emptying

[paul243]

Both the kitchen and bathroom sinks have a loud gurgling when emptying. No sound at first but loud at the end of emptying. Neither seem to have vents on the traps, is that the cause?
Any fix?
Thanks

 

[Bosswhite]

Sounds like partial blockage , check inspection chambers , sink traps etc

 

[Deleted member 267285]

Recently or always happened?

 

[paul243]

Recently or always happened?

Worse recently

 

[paul243]

Sounds like partial blockage , check inspection chambers , sink traps etc

Thanks, I've removed everything and cleaned out all traps and pipes. Outlet goes direct outside to drain, nothing else connected.
Would this help?
https://www.ebay.co.uk/itm/254713445752?ssPageName=STRK:MEBIDX:IT&_trksid=p2060353.m1438.l2649

 

[HERTS P&D]

Have a look in the manhole.

Andy

 

[paul243]

Have a look in the manhole.

Andy

Thanks Andy, outlet goes direct to open drain, all clear and clean

 

[Madrab]

How long is the run till the waste hits the soil pipe? Gurgling is usually down to self syphoning, where the run is overly long and the slug of water in the waste is then pulling on the trap. Get an anti vac trap and that'll stop it.

 

[paul243]

Waste exits the wall and runs 6 feet to open drain, shared with rainwater. Is this suitable? Thanks

https://www.ebay.co.uk/itm/25471344...pid=5338793847&customid=&toolid=10001&mkevt=1

 

[Madrab]

Is this suitable?

Yup, that'll do it, straight swap if it's replacing an existing P trap

 

[paul243]

Thanks Rob, I'll get one from my local PM.

 

[Madrab]

.

 

[paul243]

Yup, that'll do it, straight swap if it's replacing an existing P trap

Difficult access to measure, will it be 40 mm under a sink?

 

[Madrab]

As a standard, it should be at least 40mm.