Aquarool modification

[Terry_5119405]

Can anyone remember reading in a caravan magazine an idea that someone had to convert the small diameter hole in an aquaroll to the larger size by cutting around the filler aperture and fitting an item purchased from a plumbing department at a DIY store? I would like to know what was purchased to make this modification

Terry

 

[DeliDave]

its an access plug,my friend did it got his from Drain Center,part of plumb centre group,funnliy enough plumb center didnt keep them,when I see him Ill ask if hes got Part number and price