Leak under kitchen sink

[Rickmaver]

Good afternoon. I have an intermittent leak on a “valve”(?) just above the cold water stopcock under the kitchen sink. It appears to be only leaking for a short period after using the kitchen sink. Can anyone advise what this valve is and is it easy to replace. This has obviously been going on for some time and was concealed by a waste pipe leak under the sink which I have now rectified. Thanks in advance.

 

[SimonG]

Is that a connection for a dishwasher?

Could try a new rubber washer between appliance valve and connector.

 

[Rickmaver]

Is that a connection for a dishwasher?

Could try a new rubber washer between appliance valve and connector.

No I don’t have a dishwasher. It could be the cold feed for the washing machine I guess but it seems to be the the only cold feed under there that is open... see pic.

 

[SimonG]

It will be washing machine. You may need a new hose, but try a new washer first.

 

[snowhead]

Probably a washer like this inside the Blue cap just below where all the staining is;

Washing Machine Hose Washer

www.toolstation.com

 

[Rickmaver]

It will be washing machine. You may need a new hose, but try a new washer first.

Thank you Simon.

 

[plumbingdoctor]

Good afternoon. I have an intermittent leak on a “valve”(?) just above the cold water stopcock under the kitchen sink. It appears to be only leaking for a short period after using the kitchen sink. Can anyone advise what this valve is and is it easy to replace. This has obviously been going on for some time and was concealed by a waste pipe leak under the sink which I have now rectified. Thanks in advance.View attachment 47270

Hello

this can only be leak when you use your kitchen sink? maybe or maybe not this valve does not leak