Altecnic Flexible Heat Pump Hose 500mm Straight, 1" x 28mm | 128-3603

Description

The Altecnic 128-3603 Flexible Heat Pump Hose is a 500mm straight connection hose designed specifically for linking an air source heat pump to its associated pipework. It allows for easy, flexible connection between the heat pump and the fixed pipe run while reducing vibration transfer from the unit into the pipework.

Manufactured by Altecnic and supplied as a pair, the hoses feature a swivel connection at the heat pump end and a compression joint at the pipework end, and come fitted with thick weatherproof insulation to reduce heat losses on both internal and external pipe runs.

500 mm

Hose Length

1" BSP F

Heat Pump Connection

28mm

Compression Connection

10 Bar

Max. Pressure

90°C

Max. Temperature

2

Hoses per Pack

Key Features

Straight-Through, 500mm Length

This is the short straight variant (500mm) in Altecnic's 128-360 hose range, suited to compact pipe runs where the connection continues in line with the heat pump.

Vibration-Reducing Flexible Hose

The flexible construction absorbs movement from the heat pump's compressor and fan unit, reducing vibration transfer into the rigid pipework.

Swivel & Compression Connections

A swivel connection at the heat pump end allows easy alignment without twisting the hose, while a compression joint connects cleanly to standard copper pipework.

Weatherproof Insulation

Supplied with thick weatherproof insulation (Aeroflex HF, 19mm) to reduce heat loss and protect against condensation on external runs.

Stainless Steel Construction

The flexible hose, crimped sleeve and end connections are all manufactured from stainless steel, with brass nut and olive fittings and an EPDM liner.

BS EN Compliant Connections

Threaded connections comply with BS EN ISO 228-1 and compression ends with BS EN 1252-2 for use with R250 (half hard) copper tube.

Technical Specifications

General

Manufacturer

Altecnic

Product Code

128-3603

Body Style

Straight

Nominal Size

DN25

Pack Quantity

2 hoses (pair)

Connections

Heat Pump End

1" (G1) female swivel union

Pipework End

28mm compression joint

Hose Length (A)

500 mm

Threaded Ends Standard

BS EN ISO 228-1

Compression Ends Standard

BS EN 1252-2 (for R250 half-hard copper tube)

Performance

Max. Pressure

10 bar

Max. Temperature

90°C

Materials

Flexible Hose

Stainless steel

Crimped Sleeve

Stainless steel

End Connections

Stainless steel

Nut & Olive

Brass

Liner

EPDM

Insulation (Aeroflex HF)

Inside Diameter

35 mm

Outside Diameter

73 mm

Thickness

19 mm

Temperature Range

-50°C to 125°C

Thermal Conductivity (EN ISO 8497, 40°C)

λ ≤ 0.040 W/(m·K)

Reaction to Fire

BS EN 13501 Class 1

Water Vapour Diffusion Resistance (EN 13469)

μ ≥ 3000

UV Resistance

UV resistant

Please Note: It is recommended that isolation valves (not supplied) are fitted to the flow and return connections at the heat pump for ease of future maintenance.

Good to Know: This is the 500mm straight hose (ref. 128-3603). The same range also includes angled versions and 300mm and 750mm lengths to suit different pipe run configurations.

Frequently Asked Questions

What length pipe run is this hose suited to?

This is the 500mm straight variant, one of three lengths (300mm, 500mm and 750mm) available in Altecnic's 128-360 range, each offered in both straight and angled versions.

How many hoses are included?

The hoses are supplied in pairs, covering the flow and return connections on the heat pump.

What size pipework does this hose connect to?

The pipework end uses a 28mm compression joint, complying with BS EN 1252-2 for use with R250 (half hard) copper tube.

Does the hose come insulated?

Yes, it is supplied with 19mm thick Aeroflex HF insulation, rated from -50°C to 125°C and UV resistant, to reduce heat loss on both internal and external pipe runs.

Should I fit isolation valves with this hose?

Yes, Altecnic recommends fitting isolation valves (sold separately) to the flow and return connections at the heat pump to make future maintenance easier.

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Room Dimensions

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Room Type

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Glazing Type

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External Walls

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Insulation Level

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Average

Good (New Build)

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