Combining Warning pipes from F&E Cistern and CWSC

[angus65]

Good morning

Just a quick question.I am moving tanks down from the loft and installing Fortic cylinder and F&E cistern on 1st floor in a skeeling space.I appreciate they both should have their own dedicated warning pipes,but would their be any issues with combining the overflows internally to have one pipe coming out of the fabric of the building as I am very tight on space and the likelihood of both tanks having overflows issues at the same time will be very small.I have considered a pinhole in the coil scenario,but this would again only affect 1 cistern(the lowest)

Thank you in advance for your constructive input

 

[Terrywookfit]

Each cistern should have its own overflow warning pipe.

I hope you don't have a gravity fed shower on first floor .

 

[denso13]

but would their be any issues with combining the overflows internally

Not ideal but you'd probably get away with it as the capacity of water storage in the cylinder and cistern is not big. Perhaps fit a larger warning/overflow pipe.

 

[angus65]

Thank you both for your input.No gravity fed shower(electric mains shower).