Hi there I wondered if anyone could help. We are in the long process of renovating an old former commercial building which is listed. We have a problem at the front of the house with the rainwater drainage. I'll try and summarise it below: -In this area a hopper takes an awful lot of water during heavy rainfall which is currently coming down a soil stack sized down pipe. -This down pipe then enters the house. The previous owners had then run a soil pipe across the whole of a room (at ground level so you have to step over it) and finally it went into the soil waste at the other side of the property. -This was not at all practical and made the room unusable so we have removed the soil pipe cutting across the house and temporarily the water is draining into a water butt with a hose overflow. -Because the buildings listed we have to replace all the rainwater goods with cast iron but we need to find a solution to take the rainwater. We dug around the area where the downpipe would have ended (before it was run through the house) and we found an old stone lined gulley which we assumed was the old drain. Unfortunately this is in quite bad shape with an ingress of tree roots and because the last owners raised the land it is also very deep and would need an about 5ft digging out to get to it so we think this isn't an option. There is no other manholes/obvious drains apart from at the other side of the house. We cant keep an outdoor water butt to collect water as its listed and conservation officer wants shut of it. We had a couple of ideas but would really appreciate advice as to whether its a no go: *Install a macerator just where the outlet for the rainwater enters the house so we could take the water to the drain above ceiiling level. We were thinking of fitting a debris filter on the hopper to stop any masonry type stuff coming down into the macerator. I guess what we're concerned about is (a) whether it would cope with vol of water (b) whether it would run continuously in heavy downpour and burn out motor? *Install an internal rainwater collection vessel with pump so we could use it for garden jobs. Here we were worried about flooding so we thought if we also installed a sump pump to keep levels ok in heavy rain? Would sump pump have capacity to pump to main drain (approx 3m to ceiling and then 10m horizontal) any help or suggestions would be very much appreciated or if anyone is nearby and would like to come and look thanks so much!