A Practical Guide for Mining, Irrigation & Construction Dewatering

By Fox Global | Industrial Hose, Valve & Fitting Specialists
www.foxglobal.com.au

In mining, construction dewatering, and irrigation systems, reliable pump performance is mission-critical. One often-overlooked component that can significantly impact this reliability is the foot valve. Designed to prevent backflow and maintain pump prime, foot valves play a vital role—but only when used correctly.

So, when should you use a foot valve, and when is it better to go without one? Here’s our guide to choosing the right setup, and how to select between galvanised flanged, brass, and poly foot valves—or when to opt for a stand-alone strainer instead.

✅ When to Use a Foot Valve

Foot valves are most useful in suction lift applications, especially when the pump sits higher than the water source. Typical scenarios include:

• Construction dewatering pits where pumps sit above ground level
• Irrigation bores or river-fed pumps
• Surface-mounted pumps in mining camps or wash-down bays

In these cases, a foot valve:

• Maintains pump prime between cycles
• Prevents backflow and suction line drain-out
• Saves wear on mechanical seals and impellers during start-up

🚫 When Not to Use a Foot Valve

While foot valves can improve performance, they aren’t always the best choice.

Avoid foot valves when:

• The pump is submersible – These are already self-priming and designed to be submerged
• Frequent debris clogging occurs – Foot valves with built-in strainers can block easily
• You require rapid water evacuation or tank draining without restriction
• Your pump system needs quick response shutoff, where backflow aids pressure relief

In such cases, a stand-alone strainer with a check valve at the pump inlet or inline is often more appropriate.

🔩 Galvanised Flanged Foot Valves

Heavy-Duty Option for Harsh Environments

Advantages:

• Extremely robust for industrial mining and construction
• Withstands high flow rates and abrasive water
• Easy flange-mounting into rigid pipe systems
• Suitable for permanent and semi-permanent setups

Disadvantages:

• Heavy and not ideal for mobile or temporary applications
• Prone to corrosion if galvanising breaks down over time
• Not suited for corrosive water (e.g. saltwater or acidic mine runoff)

Best Use:
Static construction or mine dewatering setups with minimal need for mobility.

🔶 Brass Foot Valves

Ideal for Irrigation and Light Construction

Advantages:

• Excellent corrosion resistance for non-acidic water
• Long service life
• Compact and available with BSP threads for easy hose or poly pipe connections
• Suited for moderate flow rates

Disadvantages:

• More expensive than poly
• Not suitable for abrasive or slurry-filled water
• Can seize if left in place for long periods without flushing

Best Use:
Irrigation pumps, farm bores, clean water transfer in construction or landscaping.

⚫ Poly Foot Valves

Lightweight and Cost-Effective

Advantages:

• Corrosion-resistant (ideal for fertile or brackish water)
• Inexpensive and easy to replace
• Lightweight – great for mobile pumps or quick deployments
• Flexible with hose tail or BSP threaded ends

Disadvantages:

• Less durable under impact or pressure
• Can deform under vacuum or extreme heat
• Not suitable for high suction lift situations

Best Use:
Temporary dewatering, portable irrigation setups, or light-duty mining use.

🛑 When to Use a Stand-Alone Strainer Instead

Strainers without a valve allow free-flowing intake, which is better when:

• The pump is primed frequently or self-priming
• The water contains high debris loads – standalone strainers are easier to clean and maintain
• You need to backflush or purge the suction line
• You’re working with high flow-rate systems that can overcome priming challenges

Combine a strainer with an inline check valve (at or near the pump) for controlled flow and debris protection without the drawbacks of a foot valve.

Final Thoughts from Fox Global

Choosing the right foot valve—or deciding against one—depends on understanding your flow conditions, pump location, and water quality.

At Fox Global, we carry an extensive range of Galvanised Flanged, Brass, and Poly Foot Valves, along with standalone strainers and check valves, tailored for:

✅ Mining Dewatering Projects
✅ Irrigation Systems
✅ Construction Site Pumps
✅ Mobile & Temporary Setups

Let our team help you select the right valve or strainer for your system—because when your pump can’t prime, your operation stalls.

📞 Need help choosing the right foot valve or strainer for your project?
Contact Fox Global today:
📧 sales@foxglobal.com.au | ☎ 1300 852 795
🔗 www.foxglobal.com.au
We deliver nationwide, fast.