Is the STORZ firefighter connector cap with chain, aluminum suitable for drinking water and food-contact applications?

Short answer: No . the STORZ firefighter connector cap with chain, aluminum is not certified as suitable for drinking water or general food-contact applications based on the provided description. Why: The product description lists aluminium construction with NBR (nitrile) seals (white or black) and intended use across firefighting, irrigation, chemical, food industry, agriculture, etc., but it does not state any potable-water or food-contact approvals (e.g., NSF/ANSI 61, WRAS, ACS, EU food contact regulation compliance). NBR rubber commonly used here may not meet potable-water or food-grade specifications unless explicitly formulated and certified. Cast vs. forged variants have different strengths and pressures but that does not address hygiene/compatibility or regulatory approval. Recommendation: If you need a connector cap for drinking water or direct food-contact service, request from the manufacturer explicit certification/documentation (potable-water/food-contact approvals, materials declarations, migration tests) or choose components specifically specified and certified for drinking water/food contact.

Does the STORZ firefighter connector cap with chain, aluminum resist corrosion in coastal or marine environments?

The STORZ firefighter connector cap with chain, aluminum offers good general corrosion resistance due to its aluminum construction, but aluminum alone is not ideal for prolonged exposure to highly corrosive coastal or marine environments (salt spray, high humidity). Without additional corrosion protection (anodizing, marine-grade alloy, or protective coating) and regular maintenance, pitting and galvanic corrosion can occur, especially where dissimilar metals contact. For reliable long-term use near the sea, choose marine-grade materials or protective treatments, or consider stainless steel alternatives.

Can the STORZ firefighter connector cap with chain, aluminum be used with fittings of different hook spacing?

No. the STORZ firefighter connector cap with chain, aluminum cannot reliably be used with fittings that have different hook spacing. The coupling uses a symmetrical Storz head design where proper engagement depends on matching hook spacing; only elements with the same hook spacing can be connected. Using caps and fittings with different hook spacing risks poor fit, leakage, or mechanical failure. Additionally, observe the following when selecting compatibility: - Choose forged version components for higher demands (working pressure up to 16 bar, white NBR seal). - Cast version parts are weaker (working pressure up to 6 bar, black NBR seal) and should not be mixed with forged parts of differing dimensions or pressures. Always verify that both mating parts share identical hook spacing and appropriate material/pressure ratings before connecting.

STORZ firefighter connector cap with chain, aluminum

All products, Symmetrical claw couplings/

Additional information

Material	AL – aluminum

STORZ cap, equipped with a chain to prevent loss, intended for transmission installations for liquid and bulk substances. Used in firefighting, irrigation systems, chemical industry, food industry, agriculture, etc. With a symmetrical design of the connection part, it easily connects with each other. Elements with the same hook spacing can be connected. Available in a forged version with a working pressure of up to 16 bar and in a cast version, characterized by significantly lower strength with a working pressure of up to 6 bar. Material: aluminum. Working pressure: 16 bar (forged connections), 6 bar (cast connections). Seal: white NBR rubber (forged connections), black NBR rubber (cast connections).

List of product variants

Article number	Product variant name	DN	BAR	Availability	Actions
ST-31-031000-11	STORZ cap 31 mm, Al	-	16	In stock	Enquiry
ST-31-031000-US	STORZ plug 31 mm, aluminum casting	-	6	In stock	Enquiry
ST-31-044000-11	STORZ cap 44 mm, Al	-	16	In stock	Enquiry
ST-31-051000-11	STORZ cap 51 mm, Al	-	16	In stock	Enquiry
ST-31-059000-11	STORZ blind cap 59 mm, Al	-	16	In stock	Enquiry
ST-31-066000-11	STORZ blind cap 66 mm, Al	-	16	In stock	Enquiry
ST-31-066000-US	STORZ cap 66 mm, aluminum casting	-	6	In stock	Enquiry
ST-31-081000-11	STORZ blind cap 81 mm, Al	-	16	In stock	Enquiry
ST-31-089000-11	STORZ blind cap 89 mm, Al	-	16	In stock	Enquiry
ST-31-089000-US	STORZ plug 89 mm, aluminum casting	-	6	In stock	Enquiry
ST-31-105000-11	STORZ blind cap 105 mm, Al	-	16	In stock	Enquiry
ST-31-115000-11	STORZ blind cap 115 mm, Al	-	16	In stock	Enquiry
ST-31-133000-11	STORZ blind cap 133 mm, Al	-	16	In stock	Enquiry
ST-31-133000-US	STORZ blind cap 133 mm, aluminum casting	-	6	In stock	Enquiry
ST-31-148000-11	STORZ blind cap 148 mm, Al	-	16	In stock	Enquiry
ST-31-160000-11	STORZ blind cap 160 mm, Al	-	16	In stock	Enquiry
ST-31-220000-11	STORZ blind cap 220 mm, Al	-	10	In stock	Enquiry
ST-31-278000-11	STORZ blind cap 278 mm, Al	-	10	In stock	Enquiry

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STORZ cap, equipped with a chain to prevent loss, intended for transmission installations for liquid and bulk substances. Used in firefighting, irrigation systems, chemical industry, food industry, agriculture, etc. With a symmetrical design of the connection part, it easily connects with each other. Elements with the same hook spacing can be connected. Available in a forged version with a working pressure of up to 16 bar and in a cast version, characterized by significantly lower strength with a working pressure of up to 6 bar. Material: aluminum. Working pressure: 16 bar (forged connections), 6 bar (cast connections). Seal: white NBR rubber (forged connections), black NBR rubber (cast connections).