22mm Pipe Clanging Under Floorboard

[Mr Sparkle]

I recently cut and capped some pipe work under my floorboard

However, when you walk on the floor, the pipe below clangs/vibrates

Before they were being supported by the joist

What can I do about this?

Please note that In the pic, the pipe is not capped with the stop end

 

[John the plumber]

Cut it back further

 

[Alec_t]

.... or anchor it securely, or put a scrap of something soft (sponge, foam, rag, underlay etc) between it and whatever it contacts.