No water coming through my shower

I took our shower apart as it was dripping and replaced the o ring, then put the shower bk together again , now no water is coming up into the shower head ? I've taken it a part again to see if the water is coming through and it is. What do you think I need to replace ?
Asked 6 years ago by Fiona
www.showerdoc.com/ultra-group-dual-valve-service-kit-front-housing-and-cartridge-chrome-brass-sasf2-m

See the video on the above link to see if you have reassembled the parts correctly.

Answered 6 years ago by Barrie Seabright

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