What is this please?

[17rosin]

 

[Chucky_ott]

Looks like a bathtub overflow to me. The cable would be used to operate the tub stopper. It does it from outside the drain pipe. Other types of overflows have the mechanism inside the drain pipe.

 

[Sponsor]

 

[Fitter30]

What does it go to?

 

[CENTRALFL]

Picture looks similar to this UK eBay listing:

Bath Concealed Overflow Pop-Up Waste Twist Handle Chrome Plastic Pipe Bsp 1.5-Inch for sale online | eBay UK

Find many great new & used options and get the best deals for Bath Concealed Overflow Pop-Up Waste Twist Handle Chrome Plastic Pipe Bsp 1.5-Inch at the best online prices at eBay UK! Free delivery for many products!

www.ebay.co.uk

Listing title: "Bath Concealed Overflow Pop-Up Waste Twist Handle Chrome Plastic Pipe Bsp 1.5-Inch" searching by this gives other examples as well.

One of the reviews shows it being used in a tub drain and overflow, as @Chucky_ott mentioned.

 

[17rosin]

Thanks so much to you both! It does look like the ebay device. It goes to a similar small box at the end. I'll try to take another picture, could not work out what it was. Appreciate your replies!