I used 4 pvc and fittings because it was readily available but any size would potentially work.
My gutters go into 4 inch pvc.
Fasten a piece of pvc 45 degree angle joint to one end of a piece of eight to 10 foot long 4 inch diameter plastic sdr 35 sewer pipe.
It connects fairly well so the backfill was enough to hold that in to place.
And topsites i do agree.
I used a 3 4 stepdown coupling on the end of the pvc and put my black corrugated pipe around the 3 inch end.
The length will be about 200 ft from the first downspout to the discharge.
5 inch 5 520 square feet.
Multiply the drainage area by the roof pitch factor and rainfall intensity to find out the adjusted square footage.
I plan on burying my downspouts and having them merge into one 4 drain pipe.
How many downspouts can i run into a single 4 pvc.
Once the pvc was glued i set it in the trench.
If it looks like the gutter is loose check the gutter fasteners.
I don t think that side of the home has of 2k square feet of roof at the most.
Size downspouts to fit the gutter.
If a roof s various drainage areas call for different size gutters go for the biggest one k style.
This pipe has a smooth interior and closely resembles the thick walled plastic piping used for interior house drain and vent piping.
Allowing your roof water to simply discharge onto and into the soil around your house is a big mistake.
A typical house in the chicago area can have in excess of 50 000 gallons of water fall on the roof in just one year.
There should be no more than a inch drop in the direction of the downspout.
Roof area the locale s rainfall intensity and gutter capacity determine how many square inches of downspout are needed.
Run water into the gutter at the top of the.
Step 1 start from the location of the down spout on the gutter system and mark the desired path of the pvc drainage pipe on the ground using construction marker spray.
A square inch of downspout can drain 1 200 square feet of roof during a rain with an intensity of one inch per hour.
Wipe pvc glue using its applicator around the outside and.
I m thinking 4 should be sufficient.
Fittings can be permanently welded to the pipe with pvc cement.
There will be a total of 4 downspouts merging into the same line.
My roof in cincinnati will capture about 145 000 gallons this year.
By connecting a series of pvc pipes underground and hooking them up to your gutter system you can divert the water away from the home and safely into a designated area.
Then use the information below to see what size gutter you need.
Smooth 4 inch diameter plastic sdr 35 sewer pipe is the material i prefer to use.
The rainfall that falls on an average roof can be tremendous.
