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Frequently Asked Questions

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Conex Compression Fittings

 How do you connect different sized copper tubes?

Tube Dimensions Answer
MM Inches  
12 3/8 These are directly compatible
22 3/4 Use a 22mm coupler (301) with a 3/4" capnut compression ring
28 1 Use a 28mm capnut with a 1" compression ring
35 1 1/4 Use a 35mm capnut with a 1 1/4" compression ring
42 1 1/2 Use a S68S compression ring
54 2 These are directly compatible
67 2 1/2 These are directly compatible
76 3 Use a Conex Compression 301 IM Coupler
108 4 Use an S68 108 x 4" compression ring

 What size are the studs on the 76mm Conex compression?
They are 3/8" BSW

 What is the maximum pressure for compressed air that can be used with Conex Compression fittings?
Maximum pressure is 7 bar between 8mm and 28mm

 What is the maximum working pressure for Conex Compression fittings?
Maximum pressure is 16 bar at 30°C

 Which PTFE tape can be used for gas services?
Use high-density tape manufactured to EN715-3

 What is the maximum working temperature for Conex steel braided and nylon flexible hoses?
Maximum temperature is 70°C

Conex Valves

 What is the maximum temperature and pressure Conex Gate Valves will operate at?
Maximum of 16 bar at 30°C

 What is the maximum rating of Conex Lever Ball Valves?
Maximum of 16 bar at 30°C

 Which Conex Lever Ball Valve can be used for Gas Services?
Only use Conex 1204G with a yellow handle

 What is the maximum pressure for Conex Stop Valves?
Maximum pressure is 10 bar at 65°C

 What is the maximum working temperature for Conex Brass Float Valves?
Maximum temperature is 65°C

Conex End Feed Fittings

 Which solder should be used for End feed fittings?
Use lead free solder, either 97% tin, 3% copper or 99% tin, 1% copper

Press fittings

 Which press jaw/press collar profiles can be used with Conex >B<Press Fittings?
12mm to 54mm can only be pressed using jaws with a 'V' profile. 64mm to 108mm can only be pressed using collars with an 'M' profile

Miscellaneous

 Which Conex fittings provide electrical continuity?
Conex Compression, Conex Triflow Solder Ring, Conex Delcop End Feed, Conex Cuprofit (S Codes) & Conex >B< Press

 To which standard are Conex BSP threads manufactured to?
Conex Parallel threads are to ISO 228 Conex Taper threads are manufactured to ISO 7

 Which sealant do you recommend for potable water and gas fittings?
Use sealant Loctite 577

 Which Conex products are covered by the ROHS Regulations?
A statement regarding the ROHS (2002/95/EEC) regulations can be obtained upon request from IBP

NEW! from IBP Conex

Conex Push-Fit Conex B Press Solar - Coming Soon Copper - reduced infections