I have a house extension built circa 1997. Inside there is a three-port shallow inspection chamber where a shower and toilet join to a single 110mm waste outlet heading out of the house.
Outside the house against the wall there is a roddable Bottle Gulley. Upon inspection it has no inlet connections opened, the roddable outlet is simply connected to the aforementioned extension waste outlet via a Y-fitting.
My question is, at the time of building or now, did/does the code specify that an external rodding point should be fitted? I realise it makes sense, but it technically is possible to rod the run to the sewage plant from the inspection chamber inside if required (it's a straight run no bends) (and ok albeit with some mess inside) which negates the need for the rodding point outside.
I am asking because this otherwise unconnected bottle Gulley is in the way of where I want to build a step and I'm not clear whether it's a nice to have and can be removed or is required by regulation.
(FYI the length of pipe between the bottle gully and Y fitting on my drawing is exaggerated, in reality it's right next to it making almost a straight run for rodding)
Many thanks for any guidance Ian