Pumping Rain Rain Water Needs To Be Taken Out Of Home Sewers - Gravity Problem - Plumbing - DIY Home Improvement | DIYChatroom

Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Plumbing


Thread Tools Display Modes
Old 06-27-2010, 09:03 PM   #1
Join Date: Jun 2010
Posts: 1
Rewards Points: 10

Pumping rain Rain water needs to be taken out of Home Sewers - Gravity problem

Can an outdoor sump pump safely handle the rain water off of the back of my jhouse (about 15 squares), my patio water (20 X 30 space concrete, and a sump pump from my basement that pumps currently into my sewers but needs to be rerouted to this same outdoor source? In other words, how much water is too much water for an outdoor sump? Also, any info on a back-up generator for this outdoor pump?




JohnT. is offline   Reply With Quote
Old 06-28-2010, 11:53 AM   #2
Join Date: Nov 2007
Location: Nashua, NH, USA
Posts: 7,440
Rewards Points: 2,982

Pumping rain Rain water needs to be taken out of Home Sewers - Gravity problem

Check the gallons per minute or other volume rating of your sump pump.

If the pump cannot handle the volume, you can install a second pump next to it. (You may need a second pit connected to the first if the second pump won't fit.)


Do you get coverage you can count on? From the bag of fertilizer? From your lawn sprinklers?
AllanJ is offline   Reply With Quote
Old 06-28-2010, 03:36 PM   #3
Join Date: May 2010
Location: Massachusetts
Posts: 133
Rewards Points: 75

Pumping rain Rain water needs to be taken out of Home Sewers - Gravity problem

You need to find out what the capacity of the pump is in gallons per minute, and also figure out the square footage of the space you are trying to drain. For example, if you have 1000 square feet of surface area, a good rule of thumb is 1 gpm for every 24 square feet of surface area for a worst case 4" per hour storm will give you the gpm requirement. So, for 1000 square feet divided by 24 = 41.6 GPM pump. Then you need to figure the friction and elevation losses, so if your rising 10 feet off the pump before the water spills to gravity you need to factor in a 10 foot head loss when selecting a pump which will effect the gpm rating.
The Engineer is offline   Reply With Quote

outdoor sumps capacity

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Testing 12 year old hot water expansion tank? DJfixer Plumbing 2 01-01-2009 09:09 AM
Boosting home water pressure Bpreuett Plumbing 4 11-06-2007 03:06 PM
water pressure problem rgmetro Plumbing 6 04-09-2007 04:57 PM
Gravity Hot Water Recirculating Loop Questions harleysilo Plumbing 2 02-06-2007 04:28 PM
Drywall, Mold Problem due to Leaked Water june03 Building & Construction 2 10-31-2006 08:24 AM

Top of Page | View New Posts