Sump Pit LinerWhen the sump pit liner is secured in the hole, and it is locked in
place by the surrounding gravel, the area that has previously been
excavated by jackhammering will be refilled again with concrete.
You can do this next part of the project yourself by mixing your
own concrete, using cement, sand, and gravel in ratios of 1:2:3.
For the concrete mixture, you will use 5 gallons of water for each
bag of cement. You will pour in and smooth out the concrete mixture
a screed board and wooden float until the entire area is completed
and the new concrete is level with the basement floor. You will
finish off this new concrete surface by smoothing it out with a
trowel. When you are done securing the sump pit liner, filling it
in with gravel, and refinishing a new concrete floor surface around
it, you will then give the new concrete 24-36 hours to dry and
harden before installing the sump pump and piping.
Installing the sump pump. There are a wide variety of sump pumps available and they may vary
in the amount of groundwater per hour they can pump, whether they
are meant as the primary or backup pump, and whether they are
submersible or above ground. Submersible sump pumps, such as the
Zoeller M98 - 1/2 HP Cast Iron Submersible Sump Pump w/ Vertical
Float Switch, usually cost between $75-250 and several
manufacturers offer excellent models at good values. For my last
project, I chose a Wayne CDU980 - 3/4 HP Stainless Steel Cast Iron
Submersible Sump Pump w/ Vertical Float Switch which at the time
retailed at about $180 but I was available for me at a discount at
$150.00. Though you may look for good deals on your model, you
won't want to go cheap on quality.
Your new sump pump should have a 1 inch in diameter threaded
discharge port. Thread a 1 inch male PVC adapter into the port and
use pliers to tighten the adapter until it feels secure and tight.
Next, glue a short, schedule-40 PVC riser into the male adapter
using PVC cement. The length of the short, schedule-40 PVC riser
will depend on the height of the sump pit liner. When the riser is
secured in place, it should be just a little higher than the top of
the pit liner. Prior to setting the submersible pump into the pit,
attach its electrical wires to the riser with plastic electrical
ties or vinyl electrical tape. Next, carefully pick up the pump and
liner by grabbing the pump's support ring in one hand and the riser
in the other hand, and gently lowering the system until it rests in
the bottom of the liner.
Once the pump is resting on the base of the liner, check the float
position. Look at and readjust the pump as necessary until the
float is several inches away from the liner and can move up and
down without interference. Next install the liner lid over the
riser. Some liner lids come with a pre-fabricated slot to allow for
the space for the riser. Other liners require the user to core a
hole through it to allow an exit for the riser.
Next, installing a check valve and second riser.