20 Series Water-Cooled Torch: 35 Dinse vs No Dinse Connections
By MIG/TIG/Stick Welders & Plasma Cutters | USA Weld – HTP ... | Published: 2026-11-03
Category: Comparisons
Compare the 35 Dinse and no-Dinse 20 Series water-cooled TIG torch options, including fittings, amp rating, and which setup fits your welder.
Quick answer
Choose the 20 Series torch with the 35 Dinse adapter and 9mm quick-connect gas/water fittings if your welder uses a Dinse-style power connection and you want fast, tool-free hookups. Choose the no-Dinse version with threaded 7/8"-14 and 5/8"-18 fittings if your machine has matching threaded ports and you prefer a direct, adapter-free connection.
Connection style changes setup, not the 250A rating
Both torch options are 20 Series water-cooled units rated for 250 amps at 100% duty cycle, so the choice comes down to how the torch attaches to your welder, not welding capacity. The 35 Dinse version uses a 1/2" OD adapter for power/current supply plus 9mm quick-connect fittings for gas and water. The no-Dinse version uses threaded fittings: 7/8"-14 for water return/current supply, 5/8"-18 RH for gas, and 5/8"-18 LH for water supply.
When quick-connect fittings save time—and when they don't
The 9mm quick-connect fittings on the 35 Dinse torch let you attach and detach gas and water lines without tools, which is handy if you switch torches often or share a cooler between machines. The trade-off is that quick-connects add a small risk of incomplete engagement if not pushed fully in. The threaded no-Dinse fittings require a wrench and thread sealant, but they provide a secure, vibration-resistant connection that many welders prefer for permanent setups.
Check your welder's ports before you order
The 35 Dinse torch is the right choice only if your welder has a matching Dinse receptacle (1/2" OD) and you want the convenience of quick-connect gas/water. The no-Dinse torch requires your machine to have 7/8"-14, 5/8"-18 RH, and 5/8"-18 LH threaded ports. If your ports don't match either option, you'll need adapters or a different torch series; neither torch includes adapters for other port sizes.
Key trade-offs
- 35 Dinse with quick-connect: Fast, tool-free gas/water hookups; power connection via 1/2" OD Dinse adapter. Best if you change torches often or share a cooler. Confirm your welder has a 1/2" OD Dinse receptacle before ordering.
- No-Dinse threaded fittings: Secure, vibration-resistant threaded connections (7/8"-14, 5/8"-18 RH, 5/8"-18 LH). Best for permanent setups with matching ports. Use thread sealant and check port sizes; adapters are not included.
- Amp rating and duty cycle: Both torches are rated 250A at 100% duty cycle, so connection style is the only differentiator. Choose based on your welder's ports and how often you swap torches.
Product facts
- 20 Series (250A) Water-Cooled Torch w/35 Dinse & 9mm Quick Connect Gas & Water Fittings: 20 Series (250A) water-cooled torch with 35 Dinse (1/2" OD) power adapter and 9mm quick-connect gas and water fittings. Tool-free gas/water hookups speed torch changes on machines with a matching Dinse receptacle.
20 Series (250A) Water-Cooled Torch w/35 Dinse & 9mm Quick Connect Gas & Water Fittings - 20 Series (250A) Water-Cooled Torch with 7/8"-14 Water Return/Current Supply Fitting, 5/8"-18 RH Gas Fitting, & a 5/8"-18 LH Water Supply Line Fitting: 20 Series (250A) water-cooled torch with 7/8"-14 water return/current supply, 5/8"-18 RH gas, and 5/8"-18 LH water supply threaded fittings. Threaded connections stay secure under vibration and suit permanent installations with matching ports.
20 Series (250A) Water-Cooled Torch with 7/8"-14 Water Return/Current Supply Fitting, 5/8"-18 RH Gas Fitting, & a 5/8"-18 LH Water Supply Line Fitting
Which connection is right for you?
Best for
- Welders with a 1/2" OD Dinse receptacle who want quick, tool-free gas/water hookups
- Shops that switch torches frequently or share a water cooler between machines
Not for
- Machines with threaded ports (7/8"-14, 5/8"-18) that don't accept a Dinse adapter
- Welders who prefer a permanent, wrench-tightened connection
