Water Tank

Component Materials Selection Guide

• Potable Water: Requires hygienic materials (SS, GRP, or certified HDG) and non-toxic seals.

• Fire Water: Requires material strength (HDG, Arc-Ribbed) to ensure the integrity of the critical reserve.

• Fittings: Must include dedicated inlet, outlet, overflow, drain, and vent connections, all sized according to the tank's maximum flow rate.

• Internal Access: Safe internal ladders and manholes are required for periodic inspection and cleaning.

Scenario-Based FAQs

• Q: What is the main difference between an atmospheric tank and a pressure vessel?
• A: An atmospheric tank is open (via a vent) to atmospheric pressure and is for storage. A pressure vessel is sealed and designed to hold water under high pressure (e.g., in the Differential Compensation System) and is used for boosting, not bulk storage.

• Q: How is the risk of algae growth managed in a water tank?
• A: Tanks must be constructed of opaque, light-blocking materials (e.g., steel or dark-colored GRP) and sealed against external light penetration to prevent photosynthesis and algae growth.

• Q: What is "effective capacity," and why is it important?
• A: Effective capacity is the actual usable water volume, from the normal operating level down to the lowest safe suction level (above the pump's vortex inhibitor). This is the volume that is counted toward fire or domestic reserve requirements.