Marker Systems
Marker Systems – a comprehensive solution designed for precision and durability, our marker plates, drive-in posts, and fixings offer reliable solutions for various industries. Explore sustainability with our recyclable marker posts, aligning with your commitment to responsible practices.
Marker Systems
We supply valves and services to the following sectors. You will see the coloured bands throughout the site indicating what the valve or component is suitable for.

Trusted by Industry Leaders for 30 Years
We are a leading supplier with over 30 years of experience, we are internationally recognised for our high-quality valves and components. Our product range includes automatic control valves, air release and vacuum valves, and a wide selection of spare parts. We’ve built our success on solving water and wastewater engineering challenges with customised, top-quality valves.
Drawing from our wealth of experience, we excel in sourcing valves for various industries, including water, power generation, and general industrial markets. Choose GA Valves for expert solutions backed by decades of experience and unwavering excellence.
The GA Knowledge Hub
Read more about the valuable insights of the industry, and hear from the experts about the latest developments in the world of valves and fluid control. Explore our articles, guides, and blogs to stay informed and make informed decisions for your projects.

Guide
Sewage air valves on trade effluent rising mains: what food and drink sites need to know
If your site pumps its own effluent, whether to a treatment plant or to the public sewer, that
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Guide
Is an 80 mm air valve always an 80 mm valve?
Here’s one that catches people out. We recently had an enquiry for an 80 mm air valve, and
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Guide
Air valves on pumped industrial mains: stopping surge, trapped air and wasted energy
If a pumped main on your site bangs when the pump starts, is slow to fill, or keeps
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