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DIY Submersible Pump Level Switch Assembly

pump and water level sensor switch assembly glued to bottom of diy self watering pot reservoir
completed DIY submersible pump with level switch subassembly glued to bottom of the a water reservoir

Follow these steps to make a DIY submersible pump level switch assembly. A submersible water pump needs to be submersed in liquid because it will burn out if run dry. Here we will be attaching a water level sensor switch directly above a submersible water pump in order to protect the water pump. Above all we want to ensure the longest possible operational life of the pump. Positioning the level switch directly above the pump will prevent the pump from burning out by not allowing it to run while not fully submersed in water.

Materials Needed to Make a DIY Submersible Pump Level Switch Assembly:


Preparing the DIY submersible pump level switch assembly is simple and will only take around 5-10 minutes. The components you will need for this project are below.

diy self watering pot subassembly

Step 1:  Scuff the Surfaces of the Submersible Pump and Retaining Clip

  • use sandpaper to scuff the underside of the pump (when laying flat) where it will be glued to the reservoir floor
scuffed pump for diy self watering pot
  • now scuff the three surrounding sides located at the rear of the pump towards the wiring as show below
left side of pump scuffed for diy self watering pot
notice sandpaper scuff all along the back edge
back edge of pump scuffed for diy self watering pot
scuff with sandpaper all along the back edge
  • scruff the underside and top around the hole of the small plastic retaining mounting clip
pump retaining clip scuffed for diy self watering pot
notice scuffing along inside of small plastic mounting clip included with kit to secure pump

Step 2:  Glue the Level Switch to the Pump Retaining Clip

  • apply the 3M spray adhesive to the underside of the pump retaining clip mount and to the top around the semicircle hole as show below. Let stand for a few minutes as instructed by the glue canister
pump retaining clip with glue applied to top for diy self watering pot
spray 3M adhesive glue around the top
pump retaining clip with glue applied to bottom for diy self watering pot
spray 3M adhesive on the underside as shown
  • unscrew the plastic mounting nut on the base of the level sensor switch and remove the rubber o-ring and set it aside as we’ll use that later for an easy diy pump water intake filter
  • re-screw the plastic mounting nut onto the base of the level sensor switch just enough to slide over the thickness of the plastic pump retaining clip.
  • Spray the adhesive glue along the inside of the plastic mounting nut as show and let sit a few minutes
water level sensor switch with glue applied to thread area for diy self watering pot
  • glue the water level sensor switch to the pump retaining clip mount
water level sensor switch glued to pump retaining clip for diy self watering pot
attach the water level sensor switch as shown
level switch glued to retaining clip for diy self watering pot
attach the water level sensor switch as shown
level switch glued to retaining clip for diy self watering pot - rear view closeup
level switch glued to retaining clip for diy self watering pot - rear view
  • allow the bonding adhesive dry for 10-15 minutes to secure the level switch to the pump retaining clip

Step 3:  Attach the Level Switch / Retaining Clip Assembly to the Water Pump

  • next with the pump laying flat, spray the 3M spray adhesive around the three exposed edges of towards the rear of the as shown below on the left
glue applied to pump for diy self watering pot
adhesive bond applied to rear sides of pump
glue applied to pump and level switch for diy self watering pot
adhesive bond applied to inside of retaining clip
  • spray the 3M adhesive around the inside edges of the retaining clip assembly as shown above right
  • allow the 3M bonding adhesive to rest for about a minute before attaching the level switch to the water pump
  • attach the level switch assembly to the water pump by sliding the level switch pump retaining clip assembly down the rear of the pump as shown below
glue the level switch to the pump for diy self watering pot
attaching the water level sensor switch assembly to the water pump
  • allow the bonding adhesive dry for 10-15 minutes in order to secure the level switch assembly to the water pump

Step 4:  Attach a Screen Filter to the Water Pump (optional)

  • spray the 3M adhesive around the rim of the pump intake (where water flows in) and let set a minute
submersible pump for diy self watering pot
apply 3M adhesive around the outer rim of the water intake (flow in)
  • fold the plastic screen in half and then fold it over the water intake of the pump as shown below, and then secure the screen in place with the rubber o-ring taken from the water level sensor switch – let dry for 10-15
pump filter screen and o-ring for diy self watering pot
plastic screen cutting (1-1/4″ x 2-1/2″)
make a pump filter using a plastic screen and o-ring for diy self watering pot
adhesive bond applied to inside of retaining clip

Step 5:  Attach the Watering Tube to the Submersible Pump

It’s best to attach the watering tube to the DIY submersible pump level switch assembly before the assembly is glued to the bottom a reservoir in order to prevent the assembly from detaching from the base of the reservoir after it has been securely glued down.

  • attach the 1/4″ inner diameter tubing firmly to the top of the pump as shown below
plastic water tubing attached to pump for diy self watering pot
tubing (1/4″ inner diameter) attached to the top of the water pump

Step 6:  Install the Pump Level Switch Assembly to a Reservoir

Finally you can complete the DIY submersible water pump with level switch assembly installation by gluing it to the bottom of a reservoir.

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