WELL CAPINSTALLATION GUIDE

SIMPLE STEP-BY-STEP INSTALLATION

WC Series well cap

WC SERIESPAINTED CAST IRON

Tools Needed

Wrench

Screwdriver

Voltage Tester

Waterproof Wire Connectors

What’s Included

Top Cover

Bottom Ring

O-Rings

Bolts & Nuts

Cap Body

MOST MERRILL WELL CAPS INSTALL THE SAME WAY

1Slide on
Bottom Ring

2Install
Casing O-Ring

3Install Cap Body +
Bottom Ring Bolts

4Install Top Cover
W/ O-Rings in Body

5Tighten
Bolts Evenly

Applies to WC & WCI Series Well Caps.
(Some models have slight install variations.)

WELL CAPINSTALLATION GUIDE

SIMPLE STEP-BY-STEP INSTALLATION

STEP 1Safety First

Always turn off the power to your water well pump at the breaker.
WC Cap features vent for air flow and tapping for conduit.

Safety First

STEP 2Clear the Casing

Expose the top of the well casing and remove any dirt, rocks, or debris.
The top of the casing should be level, take off burrs on outside.

Clear the Casing

STEP 3Install Bottom Ring & O-Ring/Seal

Put bottom ring over black casing.
Stretch smaller diameter rubber O-Ring over well casing above bottom ring.
Ensure the O-ring is clean and free of damage.
Proper placement ensures a watertight, sanitary seal.

Install Bottom Ring &amp; O-Ring/Seal

STEP 4Attach the Bottom Ring

Place WC Cap Body Casting on Casing.
Push it straight down until the well cap bottoms out on the casing.
Pull bottom cap ring + o-ring & connect bolts.

Attach the Bottom Ring

WELL CAPINSTALLATION GUIDE

SIMPLE STEP-BY-STEP INSTALLATION

STEP 5Secure the Set Screws

Hand-tighten cap bolts thru the bottom ring one at a time.
Then use a wrench to snug them up a 1/4 turn more.
This locks the bottom O-ring in place without overtightening.

Secure the Set Screws

STEP 6Reconnect the Electrical Wires

Reconnect conduit to tapping on cap body.
Splice the conduit wires using approved wire connectors inside the cap.

Reconnect the Electrical Wires

STEP 7Bolt the Top Cover

With top body O-ring in place, place the top cap lid over the well cap body casting.
Tighten the stainless steel bolts and nuts in a star or criss-cross pattern.
This ensures even pressure and prevents over-stressing the bolt lugs.
Tighten until snug - do not over tighten.

Bolt the Top Cover

STEP 8Finished Installation

Your WC Series well cap is now installed.
The screened vent helps maintain proper airflow.
Protects your system from contaminants, debris, and outside elements by allowing only air to move in and out.
Verify all bolts are tight and the installation is secure.
You can now restore power to the system.

Finished Installation