How to Install a Sump Pump in a Crawl Space

If you have water collecting in your basement, you need to consider the use of a crawl space sump pump. It helps in carrying away the water, which may lead to moisture problems if the water is not removed. A crawl space sump pump installation is made a lot easier by having the right tools and materials ready. Use this guide to make the entire process a breeze.

Tools and Materials

  • Hacksaw or reciprocating saw
  • Screwdriver
  • Sandpaper
  • Level
  • Electric drill
  • A measurement device
  • Wrenches
  • PVC Pipe, adapter and valve

Step 1: Unfastening the Bottom Valve and Removing the Coupling

To begin your crawl space sump pump installation unplug the pump, and using the screwdriver, unfasten the screws that hold the seal of the check valve. Make sure you only remove the bottom part, as the upper one still holds water. Remove the bottom coupling and move the PVC pipe away from the upper part.

Step 2: Removing the Pit Cover and Water Pump

Before lifting off the cover make sure you’ve cleared the rubber coupling from the pipe and slowly lift the cover up and over the pipe. Set the cover down and lift the water pump out of the pit. Make sure you grab the pump handle to do so and not the pipe.

Step 3: Measuring and Cutting the PVC Pipe

Unscrew the pipe out of the pump using your wrench while holding the pump down. Take measurements for the new PVC pipe from the bottom of the pit to the valve. Set the pipe on a jig or just make sure it is stable before cutting it. Clean the cut part off and glue a PVC adapter to it using primer to seal the joints. Hold them in place for about 30 seconds to make sure they’re properly glued together.

Step 4: Drilling the Weep Hole

Using the electric drill, make the weep hole at the bottom of your wall. This will allow the water to evaporate. Do not have the grade above the weep hole as this can cause moisture or pest problems with your crawl space sump pump installation.

Step 5: Fitting the Pipe and Pump in the Pit

Take the PVC pipe with your newly installed adapter and slowly screw it into the pump fitting. Do not apply too much pressure—only enough to get a snug fit. Use the handle of the pump again to lift and set it back in the pit. Make sure the pump float is not near a wall when you do so. The cord from the pump should come out through the bigger hole of the cover lid.

Step 6: Re-attaching the Valve Couplings

Place the cover lid over the pit and set the new PVC pipe in position under your check valve. Line up the adapter with the valve. Put the couplings back on by attaching them to the check valve and PVC pipe. Using your screwdriver, fasten the coupling screws as tight as possible. It should now provide a snug fit.

Step 7: Final Inspection of the Crawl Space Sump Pump

Plug-in the pump and let it run for 5 minutes. Check for water dripping off the seals, especially on the bottom coupling where the new pipe has been installed. Do regular daily checks for the next week just to make sure everything is perfectly sealed on the new crawl space sump pump.