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HIU spares

18298180 - TWA-ZL NO 230V- Danfoss ( 082H3103 )

£70.00 ( Incl VAT £84.00)
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22285910 - Union F.F 3/4 x 3/4 x 26mm - Danfoss

£45.33 ( Incl VAT £54.40)
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81102635 - Pressure Relief Valve 2.5b - for VVX-I-R-FI - Danfoss

£97.41 ( Incl VAT £116.89)
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94366040 - XB 06H+ -1 40 G3/4"*20 - Danfoss

£298.00 ( Incl VAT £357.60)
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94364026 - XB 06H-1 26 3/4" Heat H/e - Danfoss

£295.00 ( Incl VAT £354.00)
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151.029 - 12L Oval - VX Solo 144B2326 - Radan

£200.00 ( Incl VAT £240.00)
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94366194 - XB 06H+ -1 40H G3/4'' H/e - Danfoss ( 144H1435 ) DHW

£245.00 ( Incl VAT £294.00)
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94364416 - XB 06H-1 16HP 3/4'' DHW plate - Danfoss

£195.00 ( Incl VAT £234.00)
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145H3671 - XB06H-1-26 G3/4'' Heat Exchanger Kit ( Service kit )

£350.00 ( Incl VAT £420.00)
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18162310 - E/Vessel CIMM 8L RP/8 3/4'' 0.5bar

£150.00 ( Incl VAT £180.00)
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DGT18143440 - Filling Loop 400 mm

£30.00 ( Incl VAT £36.00)
Out Of Stock

DGT94364408 - XB 06H-1 08HP 3/4" Htg plate - Danfoss ( 94364408 )

£175.00 ( Incl VAT £210.00)
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088H3112 - Danfoss TWA-A Thermal Actuator 230V NC

£25.00 ( Incl VAT £30.00)
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DGT18123104 - PRV MOQ 1/2'' 2.5 Bar ( 18123104 )

£43.00 ( Incl VAT £51.60)
Out Of Stock

DGT18237600 - VMA Valve DN15 PN16 Kvs 1.6

£120.00 ( Incl VAT £144.00)
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003L3815 - Danfoss IHPT Valve 90 KVS 3.0 - /99008002

£55.00 ( Incl VAT £66.00)
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Danfoss PM Regulator 004B6112 145H4425 ( DGT18231798 )

£283.00 ( Incl VAT £339.60)
Out Of Stock

DGT18126300 - Strainer 3/4'' Male-Male

£42.00 ( Incl VAT £50.40)
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DGT75219701 - Sensor Accelerator 3/4" x 3/4" ( 75219701 )

£142.00 ( Incl VAT £170.40)
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HIU Replacement Parts & Spares

When a HIU needs servicing or repair, access to high-quality and reliable parts is crucial. On this page, you can browse and purchase our full range of HIU spare parts for a wide range of units and configurations.

A HIU (Heat Interface Unit) is used in modern heating systems, often in apartment blocks or district heating schemes. It transfers heat from a central boiler system into each home.

Our online catalogue includes spares such as valves, pumps, sensors, switches, expansion vessels, and heat exchanger plates — all from trusted brands like Grundfos, Ideal, and Wilo.

We offer expert advice and next-day delivery to help service engineers, technicians and installers carry out repairs with confidence.

  • Valves
  • Expansion Vessels
  • Sensors
  • Switches
  • Pumps
  • Heat Exchanger Plates
  • Other HIU Spares

What does HIU stand for?

HIU stands for Heat Interface Unit. It’s a device used in buildings like flats or apartment blocks where all the homes share one big central heating system. The HIU sits inside each flat and controls the heating and hot water coming from that central system. It works like a mini boiler, but instead of making heat, it passes it on, safely and efficiently throughout your space.

What is the difference between a boiler and a HIU?

A boiler makes heat and hot water inside your home. A HIU gets heat and hot water from a central system that serves many homes, like in a block of flats.

What are the parts of a HIU unit?

A HIU has several parts that help it work properly. These include pumps, valves, sensors, heat exchangers, and expansion vessels.

How often should a HIU be serviced?

A HIU should be serviced once a year to make sure it keeps working well and safely.

What HIU spares do you stock?

We stock many HIU spare parts, such as valves, pumps, sensors, switches, heat exchanger plates, and more. We sell trusted brands like Grundfos, Ideal, and Wilo.