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thank you pennpiper. very much appreciated.

I have a question regarding vertical drops in a gravity sanitary manhole structure. We are designing an access vault for an arctic community (it encloses both water and sewer lines) for a building where the sanitary service lines drop about 3 m vertically into the outlet drain. All the piping...

Thanks for the information. When I worked in the south (Alberta and Saskatchewan) 4 decades ago, we did conform to that range of separation, but there are much different conditions in those jurisdictions. In the north (Northwest Territories), the separation was reduced. Our underground mains...

Thanks. All your points are valid. Unfortunately, our city service standards were established many decades ago when development was primarily limited to an area overlain by glacial outwash. Soils ranged from thick clay or silt deposit to sand and gravel. We are also in an area of...

We do that as standard practice, from a 90 or a tee, 4 joints ea. way are clamped. The thrust block is an added measure.

I have what may seem to be a foolish question: We have a situation where parallel mains, 200 mm water and 200 mm sanitary, are to be tapped for a relatively small commercial service connection. I've shown a section detail of the new installation with a 100 mm water line projecting away from the...