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Central heating connection materials are used for connecting, protecting, filling, venting, controlling and maintaining water-based heating systems. In this category, you will find filling hoses, ball valves, circulation pumps, 2-way and 3-way valves, dirt separators, air separators, pressure relief valves, boiler safety groups, check valves, expansion vessels, shut-off valves, fittings and sealants.
When choosing central heating connection materials, application, connection size, pressure rating, temperature rating, material, water flow, installation position and system compatibility are important. Hewa supplies heating fittings and connection materials for installers, business customers and private applications where safe installation, reliable operation and service-friendly maintenance are essential.
Brands
OEG - Safety relief valve 3 bar - Brass pressure valve (1/2" | 3/4")
Item no. 340170EAN 4055668025182
Price excl. VAT€ 8,22Price incl. VAT€ 9,95
In stock
Added
OEG 311910794 - High-pressure sealing washer 1 1/2"
Item no. 340794EAN 8711962013275
Price excl. VAT€ 0,58Price incl. VAT€ 0,70
In stock
Added
OEG 311910793 - High-pressure sealing washer 1 1/4"
Item no. 340793EAN 8711962013329
Price excl. VAT€ 0,41Price incl. VAT€ 0,50
In stock
Added
OEG 311910792 - High-pressure sealing washer 1"
Item no. 340792EAN 8711962013299
Price excl. VAT€ 0,25Price incl. VAT€ 0,30
In stock
Added
OEG 311910789 - High-pressure sealing washer 3/4"
Item no. 340789EAN 8711962013275
Price excl. VAT€ 0,19Price incl. VAT€ 0,23
In stock
Added
OEG 311910832 - High-pressure sealing washer 1/2"
Item no. 340832EAN 8711962057866
Price excl. VAT€ 0,17Price incl. VAT€ 0,20
In stock
Added
Henkel Loctite 5776 - Medium strength liquid thread sealant
Item no. 175776EAN 5010266003665
Price excl. VAT€ 31,36Price incl. VAT€ 37,95
Low stock
Added
Henkel Loctite 55 - Thread sealing cord
Item no. 170055EAN 4002872013986
Price excl. VAT€ 20,00Price incl. VAT€ 24,20
In stock
Added
Henkel Loctite 577 - Liquid thread sealant
Item no. 170577EAN 5010266011967
Price excl. VAT€ 30,54Price incl. VAT€ 36,95
In stock
Added
BONFIX 81701 - PTFE Sealing Cord FittingFix
Item no. 111701EAN 8717845817019
Price excl. VAT€ 25,60Price incl. VAT€ 30,98
In stock
Added
Varem UR100371CS000000 - Expansion vessel (100L)
Item no. 461003EAN 8034108707273
Price excl. VAT€ 273,00Price incl. VAT€ 330,33
Low stock
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Varem R8018241S4000000 - Solar expansion vessel (18L)
Item no. 468018EAN 8721225900723
Price excl. VAT€ 49,55Price incl. VAT€ 59,95
In stock
Added
OEG 512245103 - Pump group for unmixed circuit
Item no. 345122EAN 4023854529103
Price excl. VAT€ 280,00Price incl. VAT€ 338,80
Op nalevering
Added
ThermoVar 512240581 - Loading valve 1" female thread (+61°C)
Item no. 345728EAN 7330147126497
Price excl. VAT€ 100,00Price incl. VAT€ 121,00
In stock
Added
BONFIX 91210 - Filling hose set (3.5 m)
Item no. 111210EAN 8717845912109
Price excl. VAT€ 5,70Price incl. VAT€ 6,90
In stock
Added
BONFIX 91205 - Filling hose set (1.5 m)
Item no. 111205EAN 8717845912055
Price excl. VAT€ 4,60Price incl. VAT€ 4,80
In stock
Added
OEG 512245033 - Solar station with solar circulation pump PWM
Item no. 345033EAN 4023854910293
Price excl. VAT€ 363,60Price incl. VAT€ 439,95
In stock
Added
OEG 512230010 – Nickel-Plated Filling and Drain Valve G 1/2" M
Item no. 340010EAN 4038222198457
Price excl. VAT€ 8,22Price incl. VAT€ 9,95
In stock
Added
HydroMix Mixing Valve - Domestic Hot Water +35 to +65 °C (15 mm)
Item no. 430415EAN 8721082877602
Price excl. VAT€ 72,30Price incl. VAT€ 87,48
Low stock
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OEG 512240165 - Safety valve 1/2" for heating systems 2.5 bar with pressure gauge
Item no. 340165EAN 4055668024277
Price excl. VAT€ 20,62Price incl. VAT€ 24,95
Low stock
Added
OEG 116338845 - Brass ball valve (G 1" F)
Item no. 348845EAN 8102934851922
Price excl. VAT€ 9,88Price incl. VAT€ 11,95
In stock
Added
OEG 116338840 - Brass ball valve (G 3/4" F)
Item no. 348840EAN 8102934851921
Price excl. VAT€ 7,40Price incl. VAT€ 8,95
In stock
Added
OEG 116338810 – Brass Ball Valve (G 1/2" F)
Item no. 348810EAN 4015093680264
Price excl. VAT€ 5,90Price incl. VAT€ 7,14
In stock
Added
Afriso 77581 - Boiler safety group for heating systems up to 100 kW
Item no. 067581EAN 4016203779381
Price excl. VAT€ 60,00Price incl. VAT€ 72,60
Low stock
Added
Afriso 77938 - Boiler safety group for heating systems up to 50 kW
Item no. 067938EAN 4016203779380
Price excl. VAT€ 39,63Price incl. VAT€ 47,95
Low stock
Added
ORKLI 30313200 - 2-way zone valve without end switch 1" female thread
Item no. 573200EAN 8432336000000
Price excl. VAT€ 70,00Price incl. VAT€ 84,70
In stock
Added
OEG 512234155 - Automatic air vent with service valve G 1/2" M
Item no. 344155EAN 47241294483721
Price excl. VAT€ 7,40Price incl. VAT€ 8,95
In stock
Added
Spirotech SpiroTrap AE100 - Dirt and sludge separator 1" female thread
Item no. 281100EAN 8717811000717
Price excl. VAT€ 107,40Price incl. VAT€ 129,95
In stock
Added
Spirotech SpiroVent AA100 - Microbubble air eliminator 1" female thread
Item no. 280100EAN 8717811000175
Price excl. VAT€ 107,40Price incl. VAT€ 129,95
Low stock
Added
ALPS EXCLUSIVE AE-00001-DS - Magnetic dirt separator 1" female thread
Item no. 390155EAN 8721082877503
Price excl. VAT€ 82,60Price incl. VAT€ 99,95
In stock
Added
Pentec Duco Mix 15C - Mixing valve 15 mm compression
Item no. 429001EAN 8717065023432
Price excl. VAT€ 33,02Price incl. VAT€ 39,95
In stock
Added
OEG brass compression ring 22 mm
Item no. 346422EAN 8000130154514
Price excl. VAT€ 0,98Price incl. VAT€ 1,19
In stock
Added
ITAP Spring-Loaded check valve - Europa Type - Brass 1" female thread
Item no. 210101EAN 8721082877572
Price excl. VAT€ 20,62Price incl. VAT€ 24,95
In stock
Added
Pentec Duco - Inlet combination valve 15 x 15 mm (6 BAR)
Item no. 428399EAN 8717065000570
Price excl. VAT€ 18,97Price incl. VAT€ 22,95
In stock
Added
Caleffi 5453 DIRTMAG® - Magnetic dirt separator compression DN 25 (28 mm)
Item no. 135428EAN 8016615373806
Price excl. VAT€ 133,84Price incl. VAT€ 134,95
Op nalevering
Added
Caleffi 5453 DIRTMAG® - Magnetic dirt separator (1")
Item no. 135401EAN 8016615373820
Price excl. VAT€ 138,67Price incl. VAT€ 167,79
Op nalevering
Added
ALPS EXCLUSIVE AE-12010-OD - Open manifold 1" male thread
Item no. 391210EAN 8721225900198
Price excl. VAT€ 148,72Price incl. VAT€ 179,95
In stock
Added
ALPS EXCLUSIVE AE-00303-SG - Boiler safety group
Item no. 390303EAN 8721225900037
Price excl. VAT€ 33,02Price incl. VAT€ 39,95
In stock
Added
ALPS EXCLUSIVE AE-18061-CP - Circulation pump DN25 (180 mm, energy-efficient)
Item no. 392518EAN 8721225900327
Price excl. VAT€ 115,66Price incl. VAT€ 139,95
In stock
Added
ALPS EXCLUSIVE AE-13061-CP - Circulation pump DN25 (130 mm, energy-efficient)
Item no. 399999EAN 8721225900310
Price excl. VAT€ 115,66Price incl. VAT€ 139,95
In stock
Added
OEG 512200106 - Solar circulation pump DN20 (130 mm, with PWM control)
Item no. 342113EAN 4055668004378
Price excl. VAT€ 140,46Price incl. VAT€ 169,95
In stock
Added
OEG 512200052 - Circulation pump DN20 (130 mm, energy-efficient)
Item no. 342013EAN 4055668004781
Price excl. VAT€ 128,06Price incl. VAT€ 154,95
Op nalevering
Added
OEG 512200060 - Circulation pump DN25 (130 mm, energy-efficient)
Item no. 342513EAN 8721082877619
Price excl. VAT€ 132,19Price incl. VAT€ 159,95
Low stock
Added
OEG 512200058 - Circulation pump DN25 (180 mm, energy-efficient)
Item no. 342518EAN 8721082877626
Price excl. VAT€ 132,19Price incl. VAT€ 159,95
In stock
Added
Honeywell VC6013MP6000/U - Motorized 3-way valve 1" female thread (without auxiliary switch)
Item no. 190101EAN 8721082877411
Price excl. VAT€ 119,84Price incl. VAT€ 145,00
Low stock
Added
ITAP Spring-Loaded Check Valve - Type York - Brass 1" Female Thread
Item no. 210102EAN 8721082877565
Price excl. VAT€ 16,49Price incl. VAT€ 19,95
In stock
Added
Varem UR035231CS000000 - Expansion Vessel (35L)
Item no. 463135EAN 512239420
Price excl. VAT€ 84,50Price incl. VAT€ 102,25
Low stock
Added
OEG ball valve with hose connection (G 3/4" M)
Item no. 341741EAN 4055668017422
Price excl. VAT€ 5,02Price incl. VAT€ 6,07
In stock
Added
Hewa connection hose G 1" M | G 1" F (1.5 metres)
Item no. 189415EAN 8149384583194
Price excl. VAT€ 22,27Price incl. VAT€ 26,95
In stock
Added
Hewa connection hose G 1" M | G 1" F - 1.0 metre
Item no. 189412EAN 8149384583197
Price excl. VAT€ 18,97Price incl. VAT€ 22,95
In stock
Added
Hewa connection hose G 1" M | G 1" F - 2.0 metres
Item no. 189420EAN 8149384583192
Price excl. VAT€ 24,75Price incl. VAT€ 29,95
In stock
Added
Hewa connection hose G 1" M | G 1" F – 0.5 metre
Item no. 189405EAN 8014822958123
Price excl. VAT€ 15,66Price incl. VAT€ 18,95
In stock
Added
Hewa connection hose G 3/4" M | G 3/4" F - 1.0 metre
Item no. 189410EAN 8149384583193
Price excl. VAT€ 14,83Price incl. VAT€ 17,94
Op nalevering
Added
Zilmet Zilflex H UR0252509CS0000 - Expansion Vessel (25L)
Item no. 320925EAN 1302002500
Price excl. VAT€ 62,30Price incl. VAT€ 75,38
Low stock
Added
Zilmet Zilflex H UR0181809CS0000 - Expansion Vessel (18L)
Item no. 320918EAN 8721082877725
Price excl. VAT€ 53,70Price incl. VAT€ 64,98
Low stock
Added
Zilmet Zilflex H UR0353509CS0000 - Expansion Vessel (35L)
Item no. 320935EAN 8721082877732
Price excl. VAT€ 78,40Price incl. VAT€ 94,86
Low stock
Added
Universal Wall Bracket for Varem Expansion Vessels (up to 25L)
Item no. 461010EAN 1013948572813
Price excl. VAT€ 16,90Price incl. VAT€ 20,45
In stock
Added
Varem UR050271CS000000 - Expansion Vessel (50L)
Item no. 467150EAN 512239425
Price excl. VAT€ 112,70Price incl. VAT€ 136,37
Low stock
Added
Varem UR25231CS000000 - Expansion Vessel (25L)
Item no. 463125EAN 512239410
Price excl. VAT€ 67,60Price incl. VAT€ 81,80
Low stock
Added
Varem UR19231CS000000 - Expansion Vessel (18L)
Item no. 463118EAN 512239405
Price excl. VAT€ 50,70Price incl. VAT€ 61,35
Op nalevering
Added
ORKLI 40313200 - Motorized 3-way valve 1
Item no. 410101EAN 8721082877343
Price excl. VAT€ 84,25Price incl. VAT€ 101,94
Low stock
Added
Central heating connection materials for safe and complete heating systems
Central heating connection materials form the technical basis around heating systems. Hewa supplies filling hoses, ball valves, circulation pumps, valves, separators, air vents, pressure relief valves, expansion vessels, sealants and other fittings for installation, maintenance and service.
Choosing the right heating connection materials
A reliable heating installation requires the correct combination of connection materials, fittings and safety components. This includes parts for filling, shutting off, venting, circulating, protecting, sealing and water-side control. These components are used with boilers, heat pumps, hybrid systems, buffer tanks, underfloor heating, radiators and utility installations.
When selecting components, connection size, pressure rating, temperature rating, material type, water flow and system layout are decisive. Also view filling hoses for heating systems, ball valves for shut-off and service, dirt separators for system protection and expansion vessels for pressure absorption.
Important for heating fittings
- Check connection size, thread type, pressure rating and temperature rating
- Match fittings to boiler, heat pump, buffer tank or heat distribution system
- Use dirt separators and air separators for improved system protection
- Pay attention to water flow, flow direction, check function and shut-off options
- Check accessibility for maintenance, service and possible replacement
- Use suitable sealants for clean and leak-free installation
Applications within central heating connection materials
Filling and protection
Filling hoses, pressure relief valves, boiler safety groups, expansion vessels and check valves support a safe system setup.
Control and circulation
Circulation pumps, 2-way valves, 3-way valves, shut-off valves and fittings support flow, control and service shut-off.
Separation and venting
Particle separators, dirt separators, air separators and air vents help reduce dirt, air and potential fault sources in the system.
Frequently asked questions about central heating connection materials
What falls under central heating connection materials?
Central heating connection materials include filling hoses, ball valves, circulation pumps, 2-way and 3-way valves, dirt separators, air separators, pressure relief valves, boiler safety groups, check valves, expansion vessels, shut-off valves, fittings and sealants.
What are heating fittings used for?
Heating fittings are used to build heating systems safely, controllably and in a service-friendly way. They support filling, shut-off, circulation, protection, venting, sealing and water-side control.
Are central heating connection materials universal?
Not always. Always check connection size, thread type, pressure rating, temperature rating, material, water flow and compatibility with the heat source and the rest of the installation.
Why are dirt separators and air separators important?
Dirt separators and air separators help reduce dirt particles and air in the heating system. This can contribute to improved operation, fewer faults and protection of components such as pumps, valves and heat exchangers.
What should an installer check during installation?
An installer should check connection size, flow direction, system pressure, temperature, sealing, accessibility, maintenance access, safety and compatibility with the boiler, heat pump, buffer tank or heat distribution system.
Need heating fittings or connection materials?
View the right subcategory or contact Hewa for support with product selection, application and delivery. Hewa supports installers, business customers and private buyers with central heating connection materials for service, installation and maintenance.