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- A geometrically pefect horizontal pipe attached to a vertical pipe witha 90 deg fitting wouldn't have any slope. So how, in practice, do horizontal sewer lines get sloped?
Diagrams of PVC sewer plumbing show vertical pipes connected to horizontal pipes with fittings that make a 90 degree turn. So how, in practice, do we achieve the recommended minimum 1/4 inch per foot slope for the horizontal pipes?
Do we make the horizontal pipe slope by installing the vertical pipes not perfectly vertical?
Or do we install the pipes in the 90 degree fitting slightly askew?
Or do we glue the pipes in the fitting without worrying about the slope and then bend the pipes slightly so he horizontal pipe has slope?
Or perhaps a nominal 90 degree fitting actually turns more than 90 degrees?
Do we make the horizontal pipe slope by installing the vertical pipes not perfectly vertical?
Or do we install the pipes in the 90 degree fitting slightly askew?
Or do we glue the pipes in the fitting without worrying about the slope and then bend the pipes slightly so he horizontal pipe has slope?
Or perhaps a nominal 90 degree fitting actually turns more than 90 degrees?