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Hi Lo DKD 3/8″ Coupling

  • Automatic gas shut-off and secure connection minimise the risk of leaks and accidents
  • Effortless connection and disconnection save you time and hassle
  • Use your Hi-Lo DKD coupling with confidence wherever your work takes you
  • Durable construction ensures long-lasting performance, minimising maintenance needs
  • Experience the security of a reliable connection for your valuable gas equipment


Worldwide Delivery
Rated excellent on Google
Over 50 years welding expertise
Free delivery over £85 inc. VAT

Quantity discounts available – Click Here

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Introducing the Hi-Lo DKD 3/8″ Coupling, the essential quick-release solution for your welding and gas applications. This innovative coupling offers unmatched safety, convenience, and worldwide compatibility, making it the perfect choice for professionals and hobbyists alike.


  • Safe and Secure Connection: The Hi-Lo DKD 3/8″ Coupling features a secure push-to-connect design with a locking sleeve, ensuring a leak-proof connection every time
  • Automatic Gas Shut-Off: Experience peace of mind with the automatic gas shut-off valve that activates when disconnecting, preventing accidental gas leaks
  • Worldwide Compatibility: The DKD coupling design adheres to EN561 and ISO 7289 standards, guaranteeing compatibility with most gas equipment across the globe
  • Easy to Use: The simple push-to-connect mechanism allows for effortless connection and disconnection, even while wearing gloves
  • Durable Construction: Built with high-quality materials for long-lasting performance, even in demanding environments
  • 3/8″ Thread Size: The industry-standard 3/8″ thread size ensures seamless integration with your existing gas equipment


Part No. Description
HL3000-0188 Fuel Gas – Left Hand
HL3000-0637 Oxygen – Right Hand
Additional information

Hi Lo

Fuel Type

Fuel , Oxygen


Click and Collect:
Free Click and Collect with no minimum spend from our warehouse on the Empress Park, Southampton with on-site parking. Once your order has been processed, we will advise you when it is ready for pickup.  Just want advice?  No problem.  Feel free to call in to speak to one of our friendly experts.

EWS Fleet Coverage Areas: 
Southampton | Eastleigh | Winchester | Alton | Farnham | Petersfield | Havant | Hayling Island | Waterlooville | Fareham | Portsmouth | Gosport | Chichester | Arun | Worthing | New Forest | Christchurch | Salisbury | Wiltshire | Test Valley | Basingstoke and Deane | West Berkshire | Reading | Hart | Waverley | East Hampshire | East Dorset | Hampshire | Bournemouth | Poole | Lymington | Ringwood | Verwood | East Preston | Goring-by-Sea | Lancing | Shoreham-by-Sea | Steyning | Bramber | Horsham | Adur

Nationwide Delivery (all items excluding gas cylinders):
Free UK mainland (England, Scotland and Wales) delivery on orders over £85 inc. VAT.
UK mainland delivery is £7.50 inc. VAT on orders under £85 inc. VAT.
UK islands and Northern Ireland shipping costs may vary.

UK Delivery for Gas Cylinders:
Shipping costs for gas cylinders are calculated at checkout once the delivery postcode is entered.

International Delivery:
Please contact us for an accurate delivery quote.

Hi Lo DKD 3-8in Coupling

Hi Lo DKD 3/8″ Coupling

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