Storz System Connectors
Here you will find Storz system connectors such as couplings, adapters and hoses for professional use in construction, industry, fire departments and agriculture. The standardized connectors are designed for high flow rates and pressure loads and enable tool-free, quick coupling.
Buy Storz System Connectors — Guide&Tips
In the category Storz System Connectors you will find 177 articles for professional and demanding use in gardening, construction, and industrial applications. Storz couplings and adapters are standardized connecting elements characterized by high flow rates and extreme pressure resistance. They originally come from firefighting technology but have long been established in agriculture, irrigation technology, and on construction sites. The system is based on a standardized coupling profile with two symmetrical lugs and a sealing ring – connected and released in seconds without tools.
When purchasing, the most important factor is the correct nominal diameter. Common sizes are A (52 mm), B (75 mm), C (110 mm), and D (133 mm). Each size is designed for specific hose diameters and pressure levels. A C-hose with an inner diameter of 52 mm is often used for water lines on construction sites, while B and A sizes are used in industrial irrigation and by fire departments. Ensure that the coupling and hose have the same nominal diameter – adapters allow switching between different sizes.
Material selection is another decision criterion. Check the respective product details for the properties and certifications important for your selection. Also check the seal quality: NBR seals are oil-resistant and ageing-stable, EPDM is suitable for use with drinking water.
Popular Storz system connectors
Construction and water line for building site, garden and irrigation. Robust PVC pressure hose with Storz couplings.
To the product
Fire hose coupling size B – for connecting hoses with 75 mm diameter to pumps or tanks.
View productThe products shown cover typical applications: The industrial hose with permanently mounted Storz couplings is the first choice for water lines on construction sites and in agriculture. The adapter with lever ball valve enables quick shut-off directly at the point of extraction – practical when filling tanks or connecting to irrigation systems. The pure adapter piece in size B is suitable for adapting existing fire hoses or industrial pumps to the Storz system. Combine these basic components according to your hose diameter and the required pressure level.
Frequently asked questions about Storz system connectors
Which Storz size do I need for my hose?
The four common nominal diameters are A (52 mm), B (75 mm), C (110 mm) and D (133 mm). The decisive factor is the inner diameter of your hose. A C-hose usually has a diameter of 52 mm – the Storz size C fits it. B-hoses (75 mm) require size B. Measure the hose cross-section or read the label. If in doubt, an adapter from one size to another helps. Most Storz couplings have the size designation directly on the housing.
Are Storz couplings compatible with fire brigade standards?
Yes, Storz connections are standardised according to DIN 14345 and other international standards. They are therefore fully compatible with fire hoses, pumps and hydrants in Germany, Austria and Switzerland. Most industrial standards for irrigation and water transfer are also based on this profile. If you already own fire-fighting equipment, you can connect the couplings directly. Simply ensure the correct nominal diameter – even with standardised parts, there are gradations A through D.
Which material is best suited for Storz connectors?
Aluminium is lighter but less resistant to salt water or aggressive fertilisers. Plastic (for example, glass-fibre reinforced polyamide) is inexpensive and sufficient for occasional garden use, but has lower pressure resistance. Check the pressure class (PN) on the product: PN10 or PN16 are common for agriculture and construction sites.
Can I use Storz connectors for drinking water as well?
Yes, provided the couplings and seals are approved for drinking water. Look for an EPDM seal (ethylene propylene diene monomer rubber) and corresponding certification according to DVGW or KTW. Brass or stainless steel versions are the first choice here. Avoid copper-containing alloys as they can discolour the water. If in doubt, ask before purchasing.
Further categories – alternatives and supplementary products
In addition to the Storz connectors, you will find in the category "Connectors + Accessories other connection systems. If you do not need a standardized Storz profile, but rather flexible hose connections for the garden, the Plastic Connectors are a lightweight and inexpensive alternative. Brass Connectors – they are more corrosion-resistant and often approved for drinking water.
Additionally, in the sibling categories hose clamps and hose connectors made of POM plastic, you will find practical accessories for fixing and connecting hoses without a quick coupling. Storz systems remain the first choice when you need frequent disconnection and connection operations – for example, with mobile irrigation systems or on changing construction sites.
Brief summary
177 items in the category Storz System Connectors – standardized couplings and adapters for pumps, hoses and lines in construction, industry, fire services and agriculture. The nominal diameter (A, B, C, D) and material (brass, aluminum, plastic) are decisive. Storz connectors enable tool-free, quick coupling and are compatible with fire service and industry standards. Supplementary categories such as plastic and brass connectors offer flexible alternatives for specific applications.