Pipe Frost Protection & Temperature Maintenance

Pipe Trace Heating & Temperature Maintenance - Protecting Critical Pipework All Winter

From domestic water supply pipes in unheated roof voids to complex industrial process lines: ARC specifies self-regulating trace heating systems that protect pipework, maintain compliance temperatures, and keep building services operational through the harshest conditions.

Specify your pipe trace heating system

Two distinct risks - frost damage and compliance failure

RISK 1 - FROST DAMAGE:

Water expands by approximately 9% as it freezes. A frozen pipe cannot accommodate this expansion - it fractures. When it thaws, the fracture floods the space below: ceiling void, floor structure, plant room, or the floors immediately beneath. In a multi-storey commercial building, a hotel, a care home, or a hospital, the damage from a single pipe burst can run to tens of thousands of pounds and cause weeks of operational disruption. The timing of pipe bursts compounds the damage. Buildings at highest risk are those that close over extended periods - Christmas and New Year closures, seasonal hospitality venues, buildings under renovation. A pipe that bursts during a weekend closure or a 10-day Christmas shutdown floods undetected for days. By the time the damage is found, water has penetrated multiple floor and ceiling voids. Trace heating eliminates this risk without requiring the building to be heated throughout.

RISK 2 - LEGIONELLA COMPLIANCE:

Hot water circulation pipes that cool below 50°C enter the temperature band (20–45°C) in which Legionella bacteria proliferates. HSG274 - the HSE's Approved Code of Practice for the control of Legionella - requires that hot water distribution systems be maintained at 60°C or above at the calorifier and at 50°C or above at the return. For commercial buildings in healthcare, hospitality, food production, and care sectors, compliance with HSG274 is a regulatory obligation - not a recommendation. The eTRACE-HW-PRO trace heating cable maintains hot water pipes at 65°C, eliminating the Legionella growth window.

Self-regulating technology - the pipe determines its own heat requirement

The conductive polymer core of a self-regulating trace heating cable changes its electrical resistance in response to temperature. When the pipe is cold, resistance is low - current flows freely and heat output is high. As pipe temperature rises, resistance increases - current is reduced and heat output falls. This behaviour is inherent to the material - it requires no external calibration, no manual thermostat setting, and no zone-by-zone adjustment.

The practical consequence is significant. A self-regulating cable on a long pipe run automatically delivers more heat to the coldest sections - pipe runs in uninsulated voids, at building penetrations, or on exposed north-facing risers - while reducing output on the warmer, better-insulated sections. No manual intervention. No risk of hot spot formation from cable overlap. Energy use proportional to actual heat loss, not to a fixed power setting.

This self-regulating behaviour makes trace heating suitable for complex pipe configurations - runs with multiple bends, junctions, and varying insulation quality - without requiring zone-by-zone power management.

ICESTOP

Plug-in, Metal Pipes, Domestic & Light Commercial

The entry-level frost protection solution for accessible domestic and light commercial pipework. Plug-in installation removes the requirement for a qualified electrician in uncomplicated applications. An integrated thermostat (activates at +3°C, deactivates at +12°C) provides automatic control without a separate device. Rated to -15°C minimum installation temperature.

Power: 10 W/m

Pipe compatibility: Metal pipes only

IP X7

Note: ICESTOP is not suitable for plastic pipes. For plastic pipes, specify ICESTOP TRACE.

ICESTOP TRACE

Plug-in, Plastic & Metal Pipes, Extended Exposure

Self-regulating cable with plug-in convenience. Extends frost protection capability to plastic pipes - uPVC, PVC-c, PE, PP - where ICESTOP cannot be used. Integrated thermostat activates at +3°C, deactivates at +9°C (tighter differential reflecting plastic pipe temperature tolerance). Rated to -30°C minimum installation temperature - suitable for the most exposed UK locations.

Power: 15 W/m (self-regulating)

Pipe compatibility: Metal and plastic

IP X7

eTRACE-10/15/25-PRO

Professional Self-Regulating, Building Services & Industrial

Three power outputs (10, 15, and 25 W/m) allow specification matched to the heat loss profile of the specific pipe: diameter, insulation specification, and ambient exposure. UV-resistant insulation for outdoor and exposed applications. Suitable for plastic and metal pipes. Off temperature 85°C; maximum maintain temperature 65°C.

Applications: Commercial and industrial frost protection

Building services pipework in plant rooms, roof voids, and external risers

Cold water mains in unheated spaces

Note: Power output selection requires a heat loss calculation. ARC will calculate the correct power for your pipe specification.

eTRACE-15/25-SG

Self-Regulating with Mechanical Protective Mesh

Functionally identical to eTRACE-PRO, with the addition of a nickel-plated copper protective mesh over the outer insulation. Specified where the cable run is at risk of mechanical impact during installation or subsequent maintenance access - exposed plant room pipework, service risers, and roof-level installations.

Applications: All eTRACE-PRO applications, plus exposed industrial pipework

Service risers with maintenance access

Roof-level services

eTRACE-HW-PRO

Hot Water Temperature Maintenance, Legionella Compliance

Designed specifically for temperature maintenance of hot water circulation pipes at 65°C - the standard required to eliminate Legionella risk under HSG274. Delivers 11 W/m at 65°C pipe temperature. Moisture-proof and UV-resistant.

Applications: Hot water circulation systems in hotels, hospitals, care homes, food production, and any commercial building where HSG274 compliance is a regulatory requirement

Pipe compatibility: Metal pipes

Note: eTRACE-HW-PRO is a temperature maintenance product, not a frost protection product. For buildings with both frost risk and Legionella compliance requirements, ARC will specify both products for the appropriate circuits.

Custom Heating Tapes

Made-to-Measure

For complex pipe runs - multiple bends, T-junctions, valves, manifolds, heat exchangers, and vessels - pre-assembled custom heating tapes eliminate site fabrication risk. Each tape is assembled to project-specific length, with the cold tail and end termination factory-fitted and tested. Optional integrated thermostat where a separate control device is not required.

Applications: Valve assemblies, Manifolds, Storage vessels, Bespoke pipe configurations, Any element requiring a non-standard heating solution, Gutter applications where standard cable lengths are impractical

Matching the technology to the application

Application	Recommended Product	Notes
Domestic frost protection (metal pipe)	ICESTOP	Plug-in; no electrician required for simple installations
Domestic frost protection (plastic pipe)	ICESTOP TRACE	Plug-in; rated for uPVC, PE, PP pipe materials
Light commercial (all pipe types)	ICESTOP TRACE	-30°C rated; wider compatibility than ICESTOP
Building services frost protection	eTRACE-10/15/25-PRO	Professional grade; output matched to heat loss calculation
Exposed industrial pipework	eTRACE-15/25-SG	Protective mesh for mechanical impact resistance
Hot water temperature maintenance	eTRACE-HW-PRO	Legionella compliance at 65°C; metal pipes only
Complex pipe configurations	Custom heating tapes	Made-to-measure; factory-assembled and tested
Gutters and downpipes (metal)	eTRACE-30CHT	See Roof & Gutter page for gutter-specific specifications
Gutters and downpipes (plastic/metal)	eTRACE-10/15/25-PRO	Self-regulating; safe for plastic gutters

Multi Applications with ARC Assured

The eTRACE self-regulating trace heating technology that protects pipework is also used for gutter and downpipe frost protection - the same cable, a different application. Gutter specifications use eTRACE-30CHT (constant output, metal gutters only) or eTRACE-PRO (self-regulating, plastic and metal), with layouts designed for linear gutter runs rather than pipe circumference wrapping.

For buildings requiring both pipe and gutter trace heating, ARC specifies all elements through a single integrated ARC Assured programme - one survey, one design, one installation, one control system, and one annual maintenance inspection.

See our Roof & Gutter Frost Protection page for gutter-specific specifications

From plug-in simplicity to full plant room integration

ICESTOP AND ICESTOP TRACE:

Integrated thermostat eliminates the need for any separate control device. Activates automatically at +3°C. Connect to a standard plug outlet in a suitable location.

ETRACE-PRO, -SG, AND -HW-PRO:

Require a separate eFROST control device. ET-9200F for compact single-zone control in a single pipe circuit or small plant room installation. ET-9300 for plant rooms with multiple pipe circuits - frost protection, Legionella maintenance, and process line heating managed from a single unit with unified monitoring.

ET-9380 WLAN MODULE:

Critical for unmanned plant rooms, roof voids, and remote sites. System status, fault alerts, and performance data are accessible via the eFROST online portal without site attendance. A plant room pipe burst that floods undetected for 72 hours over a holiday closure is entirely preventable with remote monitoring.

BMS INTEGRATION:

ET-9300 and ET-9380 support integration with existing building management systems - allowing frost protection and temperature maintenance circuits to be monitored within the FM team's existing operational platform.

Where pipe trace heating is specified

Cold water mains and service pipework in unheated roof voids, loft spaces, and external wall cavities

the most common commercial frost risk location

Plant rooms during extended shutdown periods

buildings closed for Christmas or annual maintenance where internal temperatures cannot be maintained

External building services on north-facing or exposed facades

pipes routed externally or in uninsulated risers subject to direct ambient conditions

Industrial process pipework

chemical plant, food production, and manufacturing where pipe freeze halts production

Hotel and healthcare hot water circulation

HSG274 Legionella compliance; eTRACE-HW-PRO maintains 65°C

Valves, manifolds, and instrument connections

custom heating tapes for complex configurations requiring bespoke assembly

Cold stores and refrigerated loading areas

pipework routed through temperature-controlled environments

Techincal and Operational Benefits

Technical:

Self-regulating cable automatically delivers heat proportional to temperature differential

more where the pipe is coldest, less where insulation performs well

No calibration required

the polymer response is inherent to the material

Multiple power outputs (10/15/25 W/m)

allow heat loss matching without over-specification or under-delivery

Operational:

Operates reliably

in unmanned plant rooms, roof voids, and enclosed risers with no monitoring requirement between ARC Assured annual inspections

eTRACE-HW-PRO supports documented maintenance of HSG274 compliance records -

temperature maintenance is an audit requirement for commercial operators

Compliance:

eTRACE-HW-PRO's documented Legionella temperature

maintenance function supports the risk assessment log required under HSG274

ARC Assured annual inspection

provides the test record required as part of any insurance claim, insurance renewal, or legal defence involving pipework integrity

ARC will specify the right trace heating system for your pipework Discuss Legionella trace heating compliance with an ARC engineer

A constant-output cable delivers the same power per metre regardless of pipe temperature - it cannot adjust to varying conditions along the pipe run or respond to temperature changes. A self-regulating cable adjusts output based on temperature: maximum output when cold, minimum when warm. Self-regulating cables are more energy efficient and prevent overheating - making them the correct specification for frost protection in most commercial applications. Constant-output cables (such as eTRACE-30CHT, rated for metal gutters) are specified where a guaranteed minimum output is required in very low ambient conditions - a specific application, not the general standard.

Self-regulating cables can be overlapped or crossed without the risk of hot spot formation that constant-output cables present. The self-regulating mechanism reduces output where the cable temperature is elevated, including at overlap points. Unnecessary overlap increases installed material cost and is avoided in ARC's designs, but it is not a safety concern with self-regulating cable.

For a straightforward building services application - a single plant room with 50–100 metres of pipe - experienced installation typically takes one to two days. More complex installations involving multiple circuits, BMS integration, and custom tape manufacture should be programmed over three to five days including commissioning and testing. ARC will advise based on your specific project and access conditions.

Yes. Trace heating circuits should be on dedicated breakers sized to the installed load, with appropriate earth leakage protection (RCD). Professional eTRACE installations require connection to the building distribution board by a qualified electrician. ICESTOP and ICESTOP TRACE plug-in products connect to a standard 13A socket outlet in suitable locations.

ARC Assured annual inspection includes ohmic resistance testing of all heating elements - confirming circuit integrity - and insulation resistance to earth testing - confirming electrical safety. Control system calibration and sensor accuracy checks are included. A written report documents all test results and any identified remedial requirements. For regulated applications (Legionella temperature maintenance), the report provides supporting documentation for the building's HSG274 risk assessment log.

The only reliable way to confirm trace heating circuit integrity is resistance testing - which reveals degradation, partial failure, or complete open circuit that may not be apparent from a visual inspection or a control panel with no fault indication. If your system was installed more than five years ago and has not been resistance-tested since installation, a ARC Assured inspection is the recommended first step. Systems that appear energised can still have degraded elements delivering below their rated output.

Get a Free Pipe Trace Heating Survey and Specification

From a single plant room to a multi-zone commercial installation with Legionella compliance requirements - ARC surveys your pipework, calculates the correct output, and specifies the right product from the ARC Frost Protect range.

Including eTRACE-HW-PRO for HSG274 hot water temperature maintenance.

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