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HVAC accessories for clean, serviceable mechanical systems.

Unions, flanges, automatic air vents, and related fittings for chilled water, heating, and condenser water lines, organized for faster submittals, procurement, and site coordination.

UnionsServiceable pipe connections
Air ventsAutomatic air removal
PN-ratedPressure-class options
HVAC hydronic accessories range
PartnerTEMBO - HVAC accessories
Chilled water & LTHW circuits
PN16 hydronic rated
Submittal-ready supply

Choose the right hvac accessories family for your scope.

Core HVAC accessory categories for mechanical systems.

HVAC fittings are grouped clearly for consultants, contractors, and procurement teams reviewing submittals, BOQs, and project alternatives.

Dielectric union and red bolted flange01 / Connections

Unions and Flanges

Dielectric unions and flanges for serviceable HVAC pipe connections, with pressure ratings from PN16 to PN25 for heating, cooling, and hydronic distribution systems.

  • Suitable for plantroom and branch connections
  • Useful in mixed-material systems
  • Clean product grouping for BOQ review
Learn more
Automatic brass air vent02 / Air removal

Air Vents

Automatic and manual air release components for closed-loop systems where trapped air affects performance and commissioning.

  • Helps improve hydronic efficiency
  • Supports easier commissioning
  • Clear offer for consultant and contractor review
Learn more

Matched to the pressure class and fluid class the job calls for.

Accessories are specified against the consultant schedule, pressure class, connection type, and material, with alternatives offered when availability or value engineering is relevant.

Request technical support
Pressure classPN10 / PN16 / PN25 on request
MaterialsBrass / Bronze / Cast iron / Stainless steel
ConnectionsThreaded BSP/NPT / Flanged PN16 / Sweat
ApplicationsChilled water / LTHW / Condenser / Pressurisation
PartnerTEMBO - hydronic HVAC accessories
SupportSubmittal review / Material alternatives / Site queries

HVAC accessories for hydronic systems that need to commission cleanly.

These components sit in the small details of the mechanical system, but they affect commissioning, air removal, service access, and long-term maintenance for chilled water and heating loops.

Hydronic HVAC accessories installed on a chilled water pump loop
Chilled water

Primary and secondary HVAC loops

Unions, vents, and service accessories for chilled water distribution, pump sets, risers, and plantroom pipework in commercial and institutional projects.

Hot water circuit with threaded and flanged HVAC accessories
Heating

LTHW and hot-water circuits

Threaded and flanged accessories selected by pressure class and material compatibility for heating and hot-water distribution packages.

Serviceable HVAC branch connection with air vent and valves
Maintenance

Serviceable branch connections

Union-based connections and air removal points that help maintenance teams isolate, inspect, and recommission equipment without unnecessary pipework disruption.

Common HVAC accessory questions.

Quick answers for project teams buying hydronic unions, air vents, and related HVAC accessories.

01Do you supply HVAC accessories for chilled water systems?

Yes. We supply HVAC accessories for chilled water, LTHW, condenser water, and pressurisation circuits, including hydronic unions and automatic or manual air vents.

02Can you match the accessories to a consultant schedule?

Yes. Send the HVAC accessory schedule or BOQ and we can match pressure class, connection type, material, and available alternatives for approval.

03Why are air vents important in hydronic HVAC systems?

Trapped air reduces heat transfer, creates noise, slows commissioning, and can affect pump performance. Correctly placed air vents help the system run cleaner and more reliably.

Request pricing

Share the HVAC schedule and we'll quote.

Send the BOQ or valve and accessory schedule and we'll come back with a compliant selection list and indicative pricing for submittal.

Get in touch

Emailinfo@combinedcooperation.comPhone+965 2475 6717
OfficeOffice No. 8, 4th Floor, Mubarak Al Tijari Building, Farwaniya, Kuwait