I am considering extending/connecting the downspouts of my house to some pvc piping which I will run underground. What are things that I need to keep in mind?
Specifically, I have the pvc piping but the joints I have are for 90 degree angles. Is it essential that they be at 45 degree instead?
Also, is it essential that the pvc piping be sloped down an inch or two for every length of pipe (in other words whats the difference if they are just level, wont the water run off anyways)?
Can I dig the trench and put the drainage piping next to the house or is it essential that the drain pipes be a couple feet away from the house as suggested by This Old House.
I live in the northeast where winters stay below freezing for several weeks (sometimes a couple months) of the year.