Brass Double Check Valves

Proper installation is crucial for the safety of your water supply. Always consult local municipal codes before installing backflow preventers.

Step 1: Apply Thread Sealant
Wrap thread sealant tape 3 to 4 times around the Male Pipe Threads (MPT) of the fittings or pipes you will be connecting to the valve's inlet and outlet ports.

Step 2: Note the Flow Direction
Identify the flow direction arrow cast into the side of the brass valve body. The valve must be oriented so the arrow points downstream, toward your irrigation system and away from the municipal water source.

Step 3: Secure the Connections
Carefully thread the valve onto your prepared male fittings. Use a wrench on the hex ends of the valve body to tighten—do not use the check valve covers for leverage.

Step 4: House and Protect
Ensure the installed valve is housed inside an appropriately sized municipal valve box. This protects the brass body from the elements while leaving the top-facing check valves accessible for future maintenance.

How does the Wilkins Brass Double Check Valve handle high pressure during peak summer watering?
The Wilkins Brass Double Check Valve is built to withstand up to 175 PSI, ensuring reliable backflow protection even during intense summer municipal pressure spikes.

During the summer months, municipal water pressure can fluctuate dramatically as city-wide usage increases. This heavy-duty brass construction guarantees that your safety checks will not fail under load.

Does the Wilkins Brass Double Check Valve restrict water flow to my irrigation system?
Like all backflow preventers, the Wilkins Brass Double Check Valve introduces a minor friction loss, but its high-capacity design ensures ample flow for standard residential and commercial systems.

When designing your system, it is standard practice to account for a minor pressure drop across the backflow assembly. Check the spec sheet for exact flow charts related to your selected size.

What size connections does the Wilkins Brass Double Check Valve have?
The Wilkins Brass Double Check Valve features Female Pipe Thread (FPT) ports on both the inlet and outlet sides for secure connections to standard male pipe threads.

You will need matching Male Pipe Thread (MPT) adapters on your PVC or poly tubing mainlines to successfully thread into this unit.

Why is the Wilkins Brass Double Check Valve made from lead-free brass?
The Wilkins Brass Double Check Valve uses lead-free brass to meet strict California requirements and national safety standards, preventing lead contamination in your potable water supply.

Because this valve separates your drinking water from your irrigation water, it is required by law in many municipalities to be cast from safe, lead-free materials.