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Hi I'm looking for some advice on replacing a cast iron hopper and downspout with plastic.
The hopper takes 3 waste water pipes from the bathroom and one gutter from a flat roof, I was intending just to wire brush and paint as with the rest of the metal guttering I have but on closer inspection this small section is in a lot worse condition and the hopper is VERY thin and rusted.
I'm wondering if I should:
A) Buy a new plastic hopper and cut the old metal one out, somehow hoping the outlet hole for the plastic hopper will match up perfectly to the metal downpipes.
B) Remove the whole lot, cutting the metal downpipe off at the base and running a new plastic hopper and spout down into the metal that'll be left as it's cemented into the clay drain.
I've tried to measure the diameter of the downpipes but it's difficult without having a cross section - I'm worried if I cut off at the base the new plastic 68mm won't fit inside the old metal part at the bottom and I won't have a water tight seal.
Will a 68mm down pipe connector allow the plastic pipe to fit inside the metal one?
Any help or advice greatly appreciated!
Photos below explain what I'm on about....
The hopper takes 3 waste water pipes from the bathroom and one gutter from a flat roof, I was intending just to wire brush and paint as with the rest of the metal guttering I have but on closer inspection this small section is in a lot worse condition and the hopper is VERY thin and rusted.
I'm wondering if I should:
A) Buy a new plastic hopper and cut the old metal one out, somehow hoping the outlet hole for the plastic hopper will match up perfectly to the metal downpipes.
B) Remove the whole lot, cutting the metal downpipe off at the base and running a new plastic hopper and spout down into the metal that'll be left as it's cemented into the clay drain.
I've tried to measure the diameter of the downpipes but it's difficult without having a cross section - I'm worried if I cut off at the base the new plastic 68mm won't fit inside the old metal part at the bottom and I won't have a water tight seal.
Will a 68mm down pipe connector allow the plastic pipe to fit inside the metal one?
Any help or advice greatly appreciated!
Photos below explain what I'm on about....