Hewalex screw connection KS 3/4” – plumbing fitting, model 42.01.00

Hewalex screw connection KS 3/4” (model 42.01.00) is a plumbing fitting engineered to join pipes and components with a 3/4-inch threaded interface. The component provides a secure mechanical connection suitable for pressurized water systems, heating circuits and solar thermal installations where a reliable 3/4” threaded joint is required. Constructed to standard dimensions for compatibility with common 3/4” plumbing threads, it is intended as a straightforward coupling or adapter in supply, return and service lines.

Advantages

The screw connection offers a compact, durable solution for threaded pipe joints with consistent thread engagement and leak-resistant assembly when used with appropriate sealing material. Its standardized 3/4” thread simplifies replacement and integration with valves, pumps and fittings from multiple manufacturers. The design enables rapid installation and removal for maintenance or component replacement without altering adjoining pipework.

Suitable for

• Domestic potable water supply and distribution
• Residential and commercial heating systems (radiators, boilers, circulation lines)
• Solar thermal circuit connections and accessory fittings
• Plumbing repairs, retrofits and component integrations where 3/4” threaded joints are specified

Key specifications

• Thread size: 3/4-inch (standard plumbing thread)
• Function: mechanical threaded connection for pipes and fittings
• Application: water systems, heating circuits and solar thermal installations
• Compatibility: designed to mate with standard 3/4” threaded valves, pumps and fittings

How to use

Prepare mating threads by cleaning debris and applying an appropriate thread sealant or tape compatible with potable water and system temperatures. Hand-start the screw connection to ensure correct alignment, then tighten with suitable tools until a secure fit is achieved without over-torquing. After installation, pressurize the system and inspect the joint for leaks; if necessary, tighten incrementally or reapply sealing material. For disassembly, isolate and depressurize the line before unscrewing the fitting.

Usage recommendations

Use thread sealant or PTFE tape rated for potable water and the system’s operating temperature range. Avoid excessive torque to prevent thread damage; follow system manufacturer guidelines for tightening. For installations in heating or solar circuits, verify material compatibility with heat transfer fluids and operating temperatures. Periodically inspect threaded joints as part of routine maintenance.