Help with toilet cold feed pipework layout

[Pootle25]

Hi, I need to replace our downstairs cloakroom toilet and the current cold feed pipework layout has confused me slightly. On the attached photo, the toilet backs onto the mdf panel on the right and the cold feed connects to a T-piece on the left. Why is there this loop in the pipework? Is it to stop backflow from the cistern? I need to move the pipe a short distance, when I do this can I do away with this "loop" and all these joins and just fit a checkvalve instead?

Thanks.

 

[cross thread]

Yes you can put it straight through ,no check valve needed

 

[Pootle25]

Yes you can put it straight through ,no check valve needed

Thanks for confirming! Any ideas why it would have originally been set up like this? Seems like a lot of effort and wasted connections if it wasn't needed.

 

[CountryFan]

Diy/handyperson perhaps? No idea. Check with the instructions for a check valve, some Siamp valves require a check valve, possibly a double one as they were found to backflow into the mains