Hydrostatic Valve Installation & Removal Tool - 40mm & 50mm | Pool Shop Australia

Hydrostatic Valve Installation & Removal Tool – 40mm & 50mm

Installing or removing a hydrostatic valve by hand is a frustrating job — and doing it wrong risks cracking the valve body or damaging the pool floor fitting. This purpose-built steel tool makes the job clean, fast, and damage-free, whether you’re fitting a new valve or pulling out an old one for replacement.

Available in two sizes to suit the most common Australian pool hydrostatic valve fittings: 40mm and 50mm.

What is a hydrostatic valve and why does it need a tool?

A hydrostatic valve (also called a hydrostatic relief valve) sits in the main drain of a pool and relieves groundwater pressure when the pool is drained — preventing the pool shell from lifting or cracking. Because the valve sits in a tight fitting at the bottom of the pool, a correctly sized tool is essential for installation and removal without damaging the valve or the fitting.

Key Features

• Durable steel construction — built to handle the torque required for tight valve fittings
• Two sizes available — 40mm (SKU: NGB-25-91000) and 50mm (SKU: NGB-25-91001)
• Suits standard Australian pool hydrostatic valve fittings
• Designed for both installation and removal
• Made in Australia

Frequently Asked Questions

What size hydrostatic valve tool do I need?

Select the size that matches your hydrostatic valve fitting — either 40mm or 50mm. If you’re unsure, check the valve body or the pool’s main drain fitting size. The 50mm size is the most common in Australian pools.

Can I use this tool to remove an old hydrostatic valve?

Yes — the tool is designed for both installation and removal of hydrostatic valves. It provides the grip and leverage needed to unscrew a valve that may have been in place for years.

What is a hydrostatic valve used for in a pool?

A hydrostatic relief valve is installed in the main drain of a pool to prevent the pool shell from lifting out of the ground when the pool is emptied. It opens automatically to relieve groundwater pressure, protecting the pool structure.

Need help?

Not sure which size you need or have a question about hydrostatic valves? Call us on 02 9970 5115 or contact us — we’re happy to help.