Puddle Flange for Underground & Overhead Water Tanks – Udhhyog Solutions

 In any water tank construction, especially RCC (Reinforced Cement Concrete) tanks, one of the most overlooked yet critical components is the puddle flange. Whether the tank is underground or overhead, preventing leakage where pipes penetrate the concrete is essential to maintain structural integrity and hygiene.



At Udhhyog, we provide premium-quality puddle flanges tailored for water tank applications, ensuring leak-proof joints and long-lasting protection against water ingress and seepage.

🔍 What Is a Puddle Flange in Water Tanks?

A puddle flange is a circular collar installed around a pipe that passes through a concrete wall or slab. It is embedded into the concrete and forms a watertight seal that prevents water from seeping along the pipe’s outer surface.

Without a puddle flange, moisture can migrate into the concrete, leading to:

  • 🌧️ Water leaks
  • 🧱 Concrete cracking
  • ⚙️ Corrosion of reinforcement
  • 🦠 Algae or bacterial growth

🏗️ Applications in Underground & Overhead Water Tanks

Udhhyog puddle flanges are widely used in:

  • RCC underground storage tanks
  • Overhead water tanks in buildings
  • Pump rooms and sumps
  • Rainwater collection tanks
  • Firefighting water reservoirs

These tanks often face hydrostatic pressure, ground movement, and frequent water level fluctuations—all of which demand strong, reliable waterproofing at every pipe entry.

✅ Why Choose Udhhyog Puddle Flanges for Water Tanks?

1. Leak-Proof Engineering

Our flanges form a permanent seal around pipes, preventing leakage and protecting tank structure for decades.

2. IS Standard Manufacturing

Udhhyog flanges are built as per IS 1538 and site-specific project requirements.

3. Materials for Every Environment

Choose from:

  • MS (Mild Steel) – Standard RCC tanks
  • GI (Galvanized Iron) – Moist or buried tanks
  • SS 304/316 – Potable water & chemical resistance

4. Custom Sizes Available

We offer puddle flanges in sizes from 50mm to 600mm+, including special coatings like red oxide primer, epoxy, and zinc plating.

🛠️ Installation Guidelines

  1. Fix the flange firmly around the pipe (welded or clamped)
  2. Position the flange to sit fully embedded inside the RCC
  3. Pour concrete carefully, avoiding air pockets near the flange
  4. Allow full curing before connecting water supply
  5. Perform leak testing post-curing for verification

💡 Udhhyog Tip: Use SS puddle flanges for overhead tanks where water quality must remain safe and hygienic.

📐 Specifications Snapshot

ParameterRange
Pipe Sizes50mm to 600mm+
Thickness5mm to 25mm
MaterialsMS, GI, SS 304/316
Collar Width50mm to 150mm
CoatingsEpoxy, Zinc, Red Oxide
ComplianceIS 1538, ASTM standards

❓ FAQs – Puddle Flanges for Water Tanks

Q1: Can I use the same puddle flange for both underground and overhead tanks?
A: While the function is the same, material choice differs. Use GI or epoxy-coated MS for underground tanks; SS 304/316 is ideal for overhead and potable water tanks.

Q2: What size puddle flange do I need?
A: Match the flange to your pipe’s outer diameter. Udhhyog can customize flanges to fit non-standard pipe sizes on request.

Q3: Do I need to reapply sealants after installation?
A: Not usually. However, in high-pressure or chemical systems, adding a sealant or waterproof grout around the pipe after curing enhances protection.

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