DIY Home Improvement, Remodeling & Repair Forum > DIY Home Improvement > Bricks, Masonry and Concrete > Sump pump

Help Support House Repair Talk by donating using the link above.
Thread Tools Search this Thread
Old 05-23-2014, 01:29 PM  
Junior Member
Join Date: Apr 2014
Posts: 7
Default Sump pump

We are having sump pump and interior drain tile put in. Is it OK to have sump basin perforated so that can catch water as well as the perforated pipes?


mok78 is offline  
Reply With Quote
Old 05-23-2014, 04:54 PM  
Contractor retired
nealtw's Avatar
Join Date: Nov 2010
Location: Upper Fraser Valley, British Columbia
Posts: 23,446
Liked 2947 Times on 2583 Posts
Likes Given: 4862


I would say no. The idea is to catch surface water so it dosn't work it's way into the basement. If you go deeper and there is water down there you just pump more water which will just replace itself as fast as it can. If the house was built on poor soil conditions that contains water, the water will actually add to the support of the house and in that case draining the water just around the sump could cause an inbalance of that support.
Is it not possible to do the drain on the outside, which is always better?
nealtw is offline  
Reply With Quote
Old 05-23-2014, 06:19 PM  
Senior Member
Wuzzat?'s Avatar
Join Date: Jan 2010
Location: , Western Hemisphere, N of the equator
Posts: 2,358
Liked 168 Times on 155 Posts
Likes Given: 95


Couldn't find a clear winner and both types are sold, so. . .
-1st case, groundwater below bottom of sump, no water in sump for perf or non-perf., pump doesn't run.
-2nd case, groundwater above sump bottom but below drain tiles, no water in sump if non-perf, water in sump if perf. and at the level of the groundwater. If your float switch is set at the level of the groundwater for perf. it will run indefinitely.
-3rd case, groundwater at or above drain tiles, water in sump for either perf or nonperf., it just entered differently. Pump runs for a long time if the float switch is set below this level. How long will it stay at this level?

I'd set the float switch to turn on with rising water at just below the bottom of the basement slab if you can get away with it but for sure just below the top surface of the basement slab.
Short cycling is not good but neither is trying to lower the level of groundwater in your area. I guess a perf. basin allows you to monitor levels right around your house after a heavy rain and after several days of drought and so you'd have some idea of how many days a pump would have to run continuously to get you past a flood condition.
The houses in my neighborhood are very similar but my neighbor across the street has a way lower sump water level than I do.

The sump refill rate depends on the groundwater level, the volume of your basin and how your soil is classified: clay, silt, sand or some combo. I seem to get by with a 1/6 hp pump and my sump refills at 1 GPM with my mostly clay soil. It has no bottom so it's equivalent to many drain holes.

Ask at least five salespeople for each type of basin for the upsides and downsides: the truth may eke, leach, bleed, dribble or seep out. Or not.

Last edited by Wuzzat?; 05-23-2014 at 06:46 PM.
Wuzzat? is offline  
Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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

Similar Threads
Thread Thread Starter DIY Home Repair Forum Replies Last Post
Connect 2 smaller sump pump to 1 large sump pump? skimmilk68 Plumbing Forum 4 05-30-2012 09:02 PM
A new sump pump? Jonn Plumbing Forum 11 09-11-2010 01:22 PM
lift pump or sump pump mikey9626 Plumbing Forum 2 05-18-2009 05:37 PM
Need a Water Pump (Sump pump?) Innis74 Plumbing Forum 13 05-05-2009 08:36 PM
Best sump pump? juryduty Plumbing Forum 6 05-01-2009 06:55 AM