DIY accessories

4Ltr. Gives long-term protection of domestic central heating systems against internal corrosion and limescale formation. Prevents corrosion of all metals and is suitable for use on all types of boilers, radiators and pipework systems. Non-toxic. Screwfix less info

4Ltr. Gives long-term protection of domestic central heating systems against internal corrosion and limescale formation. Prevents corrosion of all metals and is suitable for use on all types of boi... more info

British Gas approved. WRAS approved. SEDBUK B RatedCopper Heat ExchangerTop Outlet Fluing1 Year Manufacturer's GuaranteeNOx Emissions of 97ppmFlow Rate 13.1 Ltr/minMax Output 32kWBTU Output 109000Nox Emissions: 97 * SEDBUK B Rated * Copper Heat Exchanger * Top Outlet Fluing * 1 Year Manufacturer's Guarantee * NOx Emissions of 97ppm * Flow Rate 13.1 Ltr/min * Max Output 32kW * BTU Output 109000 * Nox Emissions: 97 Screwfix less info

British Gas approved. WRAS approved. SEDBUK B RatedCopper Heat ExchangerTop Outlet Fluing1 Year Manufacturer's GuaranteeNOx Emissions of 97ppmFlow Rate 13.1 Ltr/minMax Output 32kWBTU Output 109000N... more info

British Gas approved. WRAS approved. SEDBUK B RatedCopper Heat ExchangerTop Outlet Fluing1 Year Manufacturer's GuaranteeHeating Only Boiler28kW Max OutputMax Output 28kWBTU Output 96000NOx Emissions: 112ppm * SEDBUK B Rated * Copper Heat Exchanger * Top Outlet Fluing * 1 Year Manufacturer's Guarantee * Heating Only Boiler * 28kW Max Output * Max Output 28kW * BTU Output 96000 * NOx Emissions: 112ppm Screwfix less info

British Gas approved. WRAS approved. SEDBUK B RatedCopper Heat ExchangerTop Outlet Fluing1 Year Manufacturer's GuaranteeHeating Only Boiler28kW Max OutputMax Output 28kWBTU Output 96000NOx Emission... more info

British Gas approved. WRAS approved. SEDBUK B RatedCopper Heat ExchangerTop Outlet Fluing1 Year Manufacturer's GuaranteeNOx Emissions of 110ppmFlow Rate 10.1 Ltr/minMax Output 24kWBTU Output 82000Nox Emissions: 110 * SEDBUK B Rated * Copper Heat Exchanger * Top Outlet Fluing * 1 Year Manufacturer's Guarantee * NOx Emissions of 110ppm * Flow Rate 10.1 Ltr/min * Max Output 24kW * BTU Output 82000 * Nox Emissions: 110 Screwfix less info

British Gas approved. WRAS approved. SEDBUK B RatedCopper Heat ExchangerTop Outlet Fluing1 Year Manufacturer's GuaranteeNOx Emissions of 110ppmFlow Rate 10.1 Ltr/minMax Output 24kWBTU Output 82000N... more info

British Gas approved. WRAS approved. SEDBUK A RatedStainless Steel Heat ExchangerTop Outlet Fluing2 Year Manufacturer's GuaranteeEnergy Saving Trust ApprovedFlow Rate 14 Ltr/minMax Output 32kWBTU Output 109000Nox Emissions: 37Frost Protection * SEDBUK A Rated * Stainless Steel Heat Exchanger * Top Outlet Fluing * 2 Year Manufacturer's Guarantee * Energy Saving Trust Approved * Flow Rate 14 Ltr/min * Max Output 32kW * BTU Output 109000 * Nox Emissions: 37 * Frost Protection Screwfix less info

British Gas approved. WRAS approved. SEDBUK A RatedStainless Steel Heat ExchangerTop Outlet Fluing2 Year Manufacturer's GuaranteeEnergy Saving Trust ApprovedFlow Rate 14 Ltr/minMax Output 32kWBTU O... more info

High efficiency condensing boiler with advanced, pre-mixed combustion and electronics. SEDBUK A RatedSystem Boiler OnlySelf DiagnosticRange Rateable OutputHeating Only Boiler * SEDBUK A Rated * System Boiler Only * Self Diagnostic * Range Rateable Output * Heating Only Boiler Screwfix less info

High efficiency condensing boiler with advanced, pre-mixed combustion and electronics. SEDBUK A RatedSystem Boiler OnlySelf DiagnosticRange Rateable OutputHeating Only Boiler * SEDBUK A Rated * Sys... more info

Provides long term protection of domestic central heating systems against internal corrosion, limescale formation and bacterial contamination. Prevents corrosion of all metals. Use on all types of boilers, radiators and pipework systems. Non-toxic. Stops Frequent Venting of RadiatorsPrevents Bacterial Contamination10 Year Manufacturer's Guarantee * Stops Frequent Venting of Radiators * Prevents Bacterial Contamination * 10 Year Manufacturer's Guarantee Screwfix less info

Provides long term protection of domestic central heating systems against internal corrosion, limescale formation and bacterial contamination. Prevents corrosion of all metals. Use on all types of ... more info

British Gas approved. WRAS approved. SEDBUK B RatedCopper Heat ExchangerTop Outlet Fluing1 Year Manufacturer's GuaranteeNOx Emissions of 112ppmFlow Rate 11.7 Ltr/minMax Output 28kWBTU Output 96000Nox Emissions: 112 * SEDBUK B Rated * Copper Heat Exchanger * Top Outlet Fluing * 1 Year Manufacturer's Guarantee * NOx Emissions of 112ppm * Flow Rate 11.7 Ltr/min * Max Output 28kW * BTU Output 96000 * Nox Emissions: 112 Screwfix less info

British Gas approved. WRAS approved. SEDBUK B RatedCopper Heat ExchangerTop Outlet Fluing1 Year Manufacturer's GuaranteeNOx Emissions of 112ppmFlow Rate 11.7 Ltr/minMax Output 28kWBTU Output 96000N... more info

British Gas approved. WRAS approved. SEDBUK A RatedStainless Steel Heat ExchangerTop Outlet Fluing2 Year Manufacturer's GuaranteeEnergy Saving Trust ApprovedFlow Rate 10.4 Ltr/minMax Output 24kWBTU Output 82000Nox Emissions: 35Frost Protection * SEDBUK A Rated * Stainless Steel Heat Exchanger * Top Outlet Fluing * 2 Year Manufacturer's Guarantee * Energy Saving Trust Approved * Flow Rate 10.4 Ltr/min * Max Output 24kW * BTU Output 82000 * Nox Emissions: 35 * Frost Protection Screwfix less info

British Gas approved. WRAS approved. SEDBUK A RatedStainless Steel Heat ExchangerTop Outlet Fluing2 Year Manufacturer's GuaranteeEnergy Saving Trust ApprovedFlow Rate 10.4 Ltr/minMax Output 24kWBTU... more info

Differential pressure bypass valve for heating systems where TRVs are installed. Maintains high return water temperature to inhibit rust. Maintains Optimum Flow RateReduces Noise & VibrationMaximises Boiler Efficiency * Maintains Optimum Flow Rate * Reduces Noise & Vibration * Maximises Boiler Efficiency Screwfix less info

Differential pressure bypass valve for heating systems where TRVs are installed. Maintains high return water temperature to inhibit rust. Maintains Optimum Flow RateReduces Noise & VibrationMax... more info

Stainless steel sheathed heating element. BEAB approved. WRAS approved. 2.2kW2.5Ltr CapacityElectronic Thermistor2 Year Manufacturer's Guarantee * 2.2kW * 2.5Ltr Capacity * Electronic Thermistor * 2 Year Manufacturer's Guarantee Screwfix less info

Stainless steel sheathed heating element. BEAB approved. WRAS approved. 2.2kW2.5Ltr CapacityElectronic Thermistor2 Year Manufacturer's Guarantee * 2.2kW * 2.5Ltr Capacity * Electronic Thermistor * ... more info

British Gas approved. SEDBUK A RatedStainless Steel Heat ExchangerTop Outlet Fluing2 Year Manufacturer's GuaranteeEnergy Saving Trust Approved28kW Max OutputMax Output 28kWBTU Output 96000Nox Emissions: C5 * SEDBUK A Rated * Stainless Steel Heat Exchanger * Top Outlet Fluing * 2 Year Manufacturer's Guarantee * Energy Saving Trust Approved * 28kW Max Output * Max Output 28kW * BTU Output 96000 * Nox Emissions: C5 Screwfix less info

British Gas approved. SEDBUK A RatedStainless Steel Heat ExchangerTop Outlet Fluing2 Year Manufacturer's GuaranteeEnergy Saving Trust Approved28kW Max OutputMax Output 28kWBTU Output 96000Nox Emiss... more info

High efficiency condensing boiler with advanced, pre-mixed combustion. Sealed system compatible with additional equipment. Sedbuk Band A RatedOpen Vent or System BoilerSelf DiagnosticAdvanced Electronics * Sedbuk Band A Rated * Open Vent or System Boiler * Self Diagnostic * Advanced Electronics Screwfix less info

High efficiency condensing boiler with advanced, pre-mixed combustion. Sealed system compatible with additional equipment. Sedbuk Band A RatedOpen Vent or System BoilerSelf DiagnosticAdvanced Elect... more info

Push straight onto copper tube (use Pipe Inserts for plastic pipe). Removable and re-usable. Water Research Council Approved. British Gas Service Approved for water pipes. No tools needed. BS 7291/PT1/PT3. Use 1m of copper pipe when coupling to a boiler. Speedfit is updating some fittings, so certain items received may vary in appearance to those pictured, but are of equal or better quality. Screwfix less info

Push straight onto copper tube (use Pipe Inserts for plastic pipe). Removable and re-usable. Water Research Council Approved. British Gas Service Approved for water pipes. No tools needed. BS 7291/... more info

Multipurpose treatment to inhibit corrosion, scale, boiler noise and hydrogen gassing in all types of indirect heating systems, including those containing aluminium. Screwfix less info

Multipurpose treatment to inhibit corrosion, scale, boiler noise and hydrogen gassing in all types of indirect heating systems, including those containing aluminium. Screwfix

275ml. A unique, life-long system treatment for the elimination of limescale and boiler noise. Safe to use in all types of indirect central heating systems. Non-acidic. Apply using a caulk gun via bleed valve or filling loop. 1 tube treats a typical domestic heating system. Restores Boiler EfficiencyEliminates KettlingNo Need to Flush - Stays in System * Restores Boiler Efficiency * Eliminates Kettling * No Need to Flush - Stays in System Screwfix less info

275ml. A unique, life-long system treatment for the elimination of limescale and boiler noise. Safe to use in all types of indirect central heating systems. Non-acidic. Apply using a caulk gun via ... more info

Bi-metallic sensor. Surface mounted. Control for boilers and wet central heating. Complies with EN 60730. Conforms to 89/336/EEC and 73/23/EEC. Suitable for Uninsulated / Foam-Lagged CylindersFixing Strap IncludedDouble Insulated * Suitable for Uninsulated / Foam-Lagged Cylinders * Fixing Strap Included * Double Insulated Screwfix less info

Bi-metallic sensor. Surface mounted. Control for boilers and wet central heating. Complies with EN 60730. Conforms to 89/336/EEC and 73/23/EEC. Suitable for Uninsulated / Foam-Lagged CylindersFixin... more info

Rise of 57C alarm trigger. Use in kitchens / boiler rooms. Includes mounting base. EN 54-7. Screwfix less info

Rise of 57C alarm trigger. Use in kitchens / boiler rooms. Includes mounting base. EN 54-7. Screwfix

275ml. General purpose treatment for total protection against scale and corrosion. For use in all types of indirect central heating systems, including those containing aluminium. Non-acidic. Ensures Optimum Boiler EfficiencyPrevents Pin-HolingNon-Staining, Colourless Formulation * Ensures Optimum Boiler Efficiency * Prevents Pin-Holing * Non-Staining, Colourless Formulation Screwfix less info

275ml. General purpose treatment for total protection against scale and corrosion. For use in all types of indirect central heating systems, including those containing aluminium. Non-acidic. Ensure... more info

Helps reduce boiler noise. Improves heat transfer efficiency. Non-toxic. Suitable for All Boiler TypesPrevents Bacterial Contamination10 Year Manufacturer's Guarantee * Suitable for All Boiler Types * Prevents Bacterial Contamination * 10 Year Manufacturer's Guarantee Screwfix less info

Helps reduce boiler noise. Improves heat transfer efficiency. Non-toxic. Suitable for All Boiler TypesPrevents Bacterial Contamination10 Year Manufacturer's Guarantee * Suitable for All Boiler Type... more info