Closing access hole in waste branch pipe.

[larold]

[GALLERY=media, 10042][/GALLERY]
I recently bought one of these soil branch pipes. As well as 110mm wc waste, it has a 50mm hole for waste inlet from bath or shower. I drilled 40mm hole in it as I was intending to connect new shower, but now decided to have low level shower so this hole is no longer needed. What do I need to close the hole up permanently. Is there some sort of cap I can buy? What exactly do i need to ask for or search on?
Thanks

 

[buck51]

A boss adaptor, down to 1 1/2", or 1 1/4" and a cap / stop end

 

[kirkgas]

buck51's post is exactly right, i would only add make sure you buy a boss to suit the branch you bought cause i'm sure some are a different size, if you ask where you bought the branch i'm sure they will be able to give you a couple of bits to blank it off,