Once the pvc was glued i set it in the trench.
My gutters go into 4 inch pvc.
There will be a total of 4 downspouts merging into the same line.
A square inch of downspout can drain 1 200 square feet of roof during a rain with an intensity of one inch per hour.
Size downspouts to fit the gutter.
Once every two years or so we get storms where the the existing gutter system on 90 of the homes in the area can t handle the flow of water from a torrential storm.
There should be no more than a inch drop in the direction of the downspout.
Allowing your roof water to simply discharge onto and into the soil around your house is a big mistake.
I plan on burying my downspouts and having them merge into one 4 drain pipe.
It connects fairly well so the backfill was enough to hold that in to place.
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.
If a roof s various drainage areas call for different size gutters go for the biggest one k style.
Smooth 4 inch diameter plastic sdr 35 sewer pipe is the material i prefer to use.
5 inch 5 520 square feet.
Then use the information below to see what size gutter you need.
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.
This pipe has a smooth interior and closely resembles the thick walled plastic piping used for interior house drain and vent piping.
Multiply the drainage area by the roof pitch factor and rainfall intensity to find out the adjusted square footage.
I used 4 pvc and fittings because it was readily available but any size would potentially work.
Doubling the number of downspouts halves the required capacity for each.
Wipe pvc glue using its applicator around the outside and.
The discharge will be at a nice point far from my house.
I used a 3 4 stepdown coupling on the end of the pvc and put my black corrugated pipe around the 3 inch end.
Run water into the gutter at the top of the.
I don t think that side of the home has of 2k square feet of roof at the most.
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.
How many downspouts can i run into a single 4 pvc.
The rainfall that falls on an average roof can be tremendous.
And topsites i do agree.
If it looks like the gutter is loose check the gutter fasteners.
My roof in cincinnati will capture about 145 000 gallons this year.
I m thinking 4 should be sufficient.
The length will be about 200 ft from the first downspout to the discharge.
