Can the Brass Quick Coupling Plug with Female BSPT Thread, NITTO KOHKI HI CUPLA be used at temperatures below freezing without risk of damage?

Brass Quick Coupling Plug with Female BSPT Thread, NITTO KOHKI HI CUPLA: Brass body itself tolerates sub‑zero temperatures without structural damage; however, risk depends on the medium (water) inside or passing through the coupling. If water freezes inside the coupling or connected hoses, ice expansion can crack seals, deform components or prevent proper sealing and operation. The product description requires flow from socket to plug and notes durable brass construction and vibration resistance, but does not state freeze‑proof seals or antifreeze ratings. Therefore: do not use with water that can freeze unless the line is drained, protected against freezing (insulation/heating) or filled with an appropriate antifreeze fluid compatible with brass and seals. If you must operate continuously below 0°C, confirm with manufacturer the seal materials and low‑temperature performance or choose couplings and sealing materials rated for freezing conditions.

Is the Brass Quick Coupling Plug with Female BSPT Thread, NITTO KOHKI HI CUPLA suitable for potable water systems and compliant with drinking water standards?

Based on the provided description, the Brass Quick Coupling Plug with Female BSPT Thread, NITTO KOHKI HI CUPLA is made of robust brass and designed for water installations, offering high durability, vibration resistance and a maximum working pressure of 10 bar with specified flow rates. However, the description does not state any certification or compliance with potable/drinking water standards (e.g., NSF/ANSI 61, WRAS, KTW, ACS or equivalent regional approvals) nor does it mention lead-free alloy composition or migration/test data required for safe contact with drinking water. Therefore, from the available information alone, you cannot conclude that the Brass Quick Coupling Plug with Female BSPT Thread, NITTO KOHKI HI CUPLA is suitable for potable water systems or compliant with drinking water standards. To confirm suitability, request manufacturer documentation certifying potable-water approvals and lead-free compliance for your jurisdiction.

Brass Quick Coupling Plug with Female BSPT Thread, NITTO KOHKI HI CUPLA

All products, General-purpose low-pressure quick couplings/

Additional information

Material	B – brass (bronze)

The Nitto Kohki HI CUPLA plug without valve, equipped with an internal BSPT thread, is a highly reliable solution for water installations where durability and resistance to vibrations are essential. Manufactured from robust brass, it ensures long-lasting performance even under demanding conditions. With a maximum working pressure of 10 bar, this plug delivers impressive flow rates tailored to different connection sizes: 4000 l/min for 1″, 3200 l/min for 3/4″, 2600 l/min for 1/2″, 1600 l/min for 3/8″, and 1000 l/min for 1/4″ at 5 bar. Its precise engineering guarantees secure and efficient connections, making it an excellent choice for professional applications that require both reliability and efficiency. For optimal functionality, the medium must always flow from the socket to the plug, ensuring smooth operation and consistent performance. This product combines Japanese precision with practical design, offering a dependable component that enhances the safety and efficiency of water systems in industrial and commercial environments.

List of product variants

Article number	Product variant name	DN	BAR	Availability	Actions
NK-20PF-B	HI CUPLA quick coupling plug, 1/4" BSPT thread, brass	-	10	In stock	Enquiry
NK-30PF-B	HI CUPLA quick coupling plug, BSPT 3/8" thread, brass	-	10	In stock	Enquiry
NK-400PF-B	HI CUPLA quick coupling plug, BSPT 1/2" thread, brass	-	10	In stock	Enquiry
NK-40PF-B	HI CUPLA quick coupling plug, 1/2" BSPT thread, brass	-	10	In stock	Enquiry
NK-600PF-B	HI CUPLA quick coupling plug, BSPT 3/4" thread, brass	-	10	In stock	Enquiry
NK-800PF-B	HI CUPLA quick coupling plug, BSPT 1" thread, brass	-	10	In stock	Enquiry

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The Nitto Kohki HI CUPLA plug without valve, equipped with an internal BSPT thread, is a highly reliable solution for water installations where durability and resistance to vibrations are essential. Manufactured from robust brass, it ensures long-lasting performance even under demanding conditions. With a maximum working pressure of 10 bar, this plug delivers impressive flow rates tailored to different connection sizes: 4000 l/min for 1″, 3200 l/min for 3/4″, 2600 l/min for 1/2″, 1600 l/min for 3/8″, and 1000 l/min for 1/4″ at 5 bar. Its precise engineering guarantees secure and efficient connections, making it an excellent choice for professional applications that require both reliability and efficiency. For optimal functionality, the medium must always flow from the socket to the plug, ensuring smooth operation and consistent performance. This product combines Japanese precision with practical design, offering a dependable component that enhances the safety and efficiency of water systems in industrial and commercial environments.