Calmag Part L Compliant Heating Pack | 22mm Filter, Inhibitor, Cleanser, Filling Loop & Scale Inhibitor
Calmag Part L Compliant Heating Pack | 22mm Filter, Inhibitor, Cleanser, Filling Loop & Scale Inhibitor
Part L Compliant Building Regs All Hard Water Areas 5 Components UK Manufactured
The Calmag Part L Compliant Heating Pack is a complete five-component heating system commissioning pack designed to meet the requirements of Building Regulations Part L (conservation of fuel and power) for new boiler and heating system installations in England and Wales. Providing everything needed to protect a new or serviced central heating system in hard water areas, it combines physical filtration of magnetic and non-magnetic debris with chemical treatment (inhibitor and cleanser) and a WRAS-approved electrolytic scale inhibitor — all in a single, convenient pack.
Suitable for all hard water areas and all seasons. The pack conforms with current Building Regulations and Part L, and is a practical, cost-effective way for heating engineers to ensure both regulatory compliance and long-term system protection in a single order.
What's In The Pack — 5 Components
| Component | Specification & Purpose |
|---|---|
| 22mm Central Heating Filter | Removes both magnetite (iron oxide sludge) and non-metallic debris from the central heating circuit. 22mm inline installation. Captures ferrous and non-ferrous particulate contamination to protect the boiler heat exchanger, pump, and zone valves. Required for Part L compliance. |
| 500ml Concentrated BuildCert Inhibitor | NSF/BuildCert certified corrosion inhibitor concentrate. Protects all metals within the heating system (ferrous and non-ferrous) against corrosion and further magnetite formation. Suitable for domestic properties up to 10 radiators or 100-litre system volume. Concentrated — dilute before use as directed. |
| 500ml Concentrated System Cleanser | Pre-commission cleanser to flush loose deposits and flux residues from new systems, or to break down existing sludge in systems being serviced. Suitable for domestic properties up to 10 radiators or 100-litre system volume. Use before filling with inhibitor. |
| WRAS Approved Filling Loop | WRAS (Water Regulations Advisory Scheme) approved filling loop for compliant re-pressurisation of sealed central heating systems. Required for Part L compliance and boiler warranty conditions. Prevents backflow contamination of the mains supply. |
| 15mm Electrolytic Scale Inhibitor (WRAS Approved) | Independently tested WRAS approved 15mm electrolytic scale conditioner. Fitted inline on the cold water supply to the boiler or cylinder. Independently tested to reduce limescale build-up by approximately 33% in hard water areas — saving energy and protecting heat exchanger surfaces. No salt, no power required. |
💡 Why is Part L Compliance Important?
Building Regulations Part L (Conservation of Fuel and Power) requires that new heating system installations — particularly replacement boilers — meet minimum energy efficiency standards. Installing a system filter and dosing with inhibitor is now a requirement under Part L, and is also a condition of warranty for most boiler manufacturers. Using a compliant pack such as this Calmag Part L pack ensures the installation meets both regulatory requirements and manufacturer conditions of warranty, protecting the engineer from liability and the homeowner from invalid warranty claims.
Frequently Asked Questions
Is this pack sufficient for a large system?
The inhibitor and cleanser concentrates are each sized for a domestic system of up to 10 radiators or 100 litres of system water volume. For larger systems (more than 10 radiators or commercial installations), additional concentrates should be purchased to achieve the correct dosage rate. The filter and scale inhibitor are standard 22mm and 15mm fittings compatible with all standard domestic heating systems.
Does the filling loop need to be permanently installed?
No — the filling loop is a temporary connection used to pressurise the sealed heating system. It is connected to the cold mains, used to fill or re-pressurise the system, and then disconnected and removed after use to prevent any backflow risk. A permanent filling loop (if required) must incorporate a double check valve — the WRAS-approved loop in this pack is designed for temporary use during installation and servicing.
Where is the electrolytic scale inhibitor fitted?
The 15mm electrolytic scale inhibitor is fitted inline on the cold water inlet to the boiler or heating system — typically on the cold feed to the expansion vessel or on the mains supply branch feeding the filling loop connection. No power or chemicals are required — the device uses a sacrificial electrolytic element that reacts with calcium ions to inhibit their crystallisation into hard scale on heat exchanger surfaces.
Calmag Part L Compliant Heating Pack | 22mm Filter, Inhibitor, Cleanser, Filling Loop & Scale Inhibitor
Part L Compliant Building Regs All Hard Water Areas 5 Components UK Manufactured
The Calmag Part L Compliant Heating Pack is a complete five-component heating system commissioning pack designed to meet the requirements of Building Regulations Part L (conservation of fuel and power) for new boiler and heating system installations in England and Wales. Providing everything needed to protect a new or serviced central heating system in hard water areas, it combines physical filtration of magnetic and non-magnetic debris with chemical treatment (inhibitor and cleanser) and a WRAS-approved electrolytic scale inhibitor — all in a single, convenient pack.
Suitable for all hard water areas and all seasons. The pack conforms with current Building Regulations and Part L, and is a practical, cost-effective way for heating engineers to ensure both regulatory compliance and long-term system protection in a single order.
What's In The Pack — 5 Components
| Component | Specification & Purpose |
|---|---|
| 22mm Central Heating Filter | Removes both magnetite (iron oxide sludge) and non-metallic debris from the central heating circuit. 22mm inline installation. Captures ferrous and non-ferrous particulate contamination to protect the boiler heat exchanger, pump, and zone valves. Required for Part L compliance. |
| 500ml Concentrated BuildCert Inhibitor | NSF/BuildCert certified corrosion inhibitor concentrate. Protects all metals within the heating system (ferrous and non-ferrous) against corrosion and further magnetite formation. Suitable for domestic properties up to 10 radiators or 100-litre system volume. Concentrated — dilute before use as directed. |
| 500ml Concentrated System Cleanser | Pre-commission cleanser to flush loose deposits and flux residues from new systems, or to break down existing sludge in systems being serviced. Suitable for domestic properties up to 10 radiators or 100-litre system volume. Use before filling with inhibitor. |
| WRAS Approved Filling Loop | WRAS (Water Regulations Advisory Scheme) approved filling loop for compliant re-pressurisation of sealed central heating systems. Required for Part L compliance and boiler warranty conditions. Prevents backflow contamination of the mains supply. |
| 15mm Electrolytic Scale Inhibitor (WRAS Approved) | Independently tested WRAS approved 15mm electrolytic scale conditioner. Fitted inline on the cold water supply to the boiler or cylinder. Independently tested to reduce limescale build-up by approximately 33% in hard water areas — saving energy and protecting heat exchanger surfaces. No salt, no power required. |
💡 Why is Part L Compliance Important?
Building Regulations Part L (Conservation of Fuel and Power) requires that new heating system installations — particularly replacement boilers — meet minimum energy efficiency standards. Installing a system filter and dosing with inhibitor is now a requirement under Part L, and is also a condition of warranty for most boiler manufacturers. Using a compliant pack such as this Calmag Part L pack ensures the installation meets both regulatory requirements and manufacturer conditions of warranty, protecting the engineer from liability and the homeowner from invalid warranty claims.
Frequently Asked Questions
Is this pack sufficient for a large system?
The inhibitor and cleanser concentrates are each sized for a domestic system of up to 10 radiators or 100 litres of system water volume. For larger systems (more than 10 radiators or commercial installations), additional concentrates should be purchased to achieve the correct dosage rate. The filter and scale inhibitor are standard 22mm and 15mm fittings compatible with all standard domestic heating systems.
Does the filling loop need to be permanently installed?
No — the filling loop is a temporary connection used to pressurise the sealed heating system. It is connected to the cold mains, used to fill or re-pressurise the system, and then disconnected and removed after use to prevent any backflow risk. A permanent filling loop (if required) must incorporate a double check valve — the WRAS-approved loop in this pack is designed for temporary use during installation and servicing.
Where is the electrolytic scale inhibitor fitted?
The 15mm electrolytic scale inhibitor is fitted inline on the cold water inlet to the boiler or heating system — typically on the cold feed to the expansion vessel or on the mains supply branch feeding the filling loop connection. No power or chemicals are required — the device uses a sacrificial electrolytic element that reacts with calcium ions to inhibit their crystallisation into hard scale on heat exchanger surfaces.
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Product Information
Shipping & Returns
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Description
Part L Compliant Building Regs All Hard Water Areas 5 Components UK Manufactured
The Calmag Part L Compliant Heating Pack is a complete five-component heating system commissioning pack designed to meet the requirements of Building Regulations Part L (conservation of fuel and power) for new boiler and heating system installations in England and Wales. Providing everything needed to protect a new or serviced central heating system in hard water areas, it combines physical filtration of magnetic and non-magnetic debris with chemical treatment (inhibitor and cleanser) and a WRAS-approved electrolytic scale inhibitor — all in a single, convenient pack.
Suitable for all hard water areas and all seasons. The pack conforms with current Building Regulations and Part L, and is a practical, cost-effective way for heating engineers to ensure both regulatory compliance and long-term system protection in a single order.
What's In The Pack — 5 Components
| Component | Specification & Purpose |
|---|---|
| 22mm Central Heating Filter | Removes both magnetite (iron oxide sludge) and non-metallic debris from the central heating circuit. 22mm inline installation. Captures ferrous and non-ferrous particulate contamination to protect the boiler heat exchanger, pump, and zone valves. Required for Part L compliance. |
| 500ml Concentrated BuildCert Inhibitor | NSF/BuildCert certified corrosion inhibitor concentrate. Protects all metals within the heating system (ferrous and non-ferrous) against corrosion and further magnetite formation. Suitable for domestic properties up to 10 radiators or 100-litre system volume. Concentrated — dilute before use as directed. |
| 500ml Concentrated System Cleanser | Pre-commission cleanser to flush loose deposits and flux residues from new systems, or to break down existing sludge in systems being serviced. Suitable for domestic properties up to 10 radiators or 100-litre system volume. Use before filling with inhibitor. |
| WRAS Approved Filling Loop | WRAS (Water Regulations Advisory Scheme) approved filling loop for compliant re-pressurisation of sealed central heating systems. Required for Part L compliance and boiler warranty conditions. Prevents backflow contamination of the mains supply. |
| 15mm Electrolytic Scale Inhibitor (WRAS Approved) | Independently tested WRAS approved 15mm electrolytic scale conditioner. Fitted inline on the cold water supply to the boiler or cylinder. Independently tested to reduce limescale build-up by approximately 33% in hard water areas — saving energy and protecting heat exchanger surfaces. No salt, no power required. |
💡 Why is Part L Compliance Important?
Building Regulations Part L (Conservation of Fuel and Power) requires that new heating system installations — particularly replacement boilers — meet minimum energy efficiency standards. Installing a system filter and dosing with inhibitor is now a requirement under Part L, and is also a condition of warranty for most boiler manufacturers. Using a compliant pack such as this Calmag Part L pack ensures the installation meets both regulatory requirements and manufacturer conditions of warranty, protecting the engineer from liability and the homeowner from invalid warranty claims.
Frequently Asked Questions
Is this pack sufficient for a large system?
The inhibitor and cleanser concentrates are each sized for a domestic system of up to 10 radiators or 100 litres of system water volume. For larger systems (more than 10 radiators or commercial installations), additional concentrates should be purchased to achieve the correct dosage rate. The filter and scale inhibitor are standard 22mm and 15mm fittings compatible with all standard domestic heating systems.
Does the filling loop need to be permanently installed?
No — the filling loop is a temporary connection used to pressurise the sealed heating system. It is connected to the cold mains, used to fill or re-pressurise the system, and then disconnected and removed after use to prevent any backflow risk. A permanent filling loop (if required) must incorporate a double check valve — the WRAS-approved loop in this pack is designed for temporary use during installation and servicing.
Where is the electrolytic scale inhibitor fitted?
The 15mm electrolytic scale inhibitor is fitted inline on the cold water inlet to the boiler or heating system — typically on the cold feed to the expansion vessel or on the mains supply branch feeding the filling loop connection. No power or chemicals are required — the device uses a sacrificial electrolytic element that reacts with calcium ions to inhibit their crystallisation into hard scale on heat exchanger surfaces.
