Cast Iron Radiator Fitting Guidelines

Radiator Fitting Guidelines

  • Appropriate dosing tool must be used and water subsequently tested to ensure correct levels of inhibitor are added to match the total water content of your system. This should be recorded for future reference. Failure to do so will invalidate any warranty offered.
  • In addition to the above, it is always important to remember that every time your heating system is drained down for repairs/alterations/decorating etc, Inhibitor will need to be re-introduced again to the correct dosing level.
  • To comply with BS 7593:2019, inhibitor levels should be checked annually and recorded as part of your boiler service. BS 7593:2019 also states that after 5 years systems should either be re-dosed, or a laboratory test performed. Failure to do the above will invalidate your warranty.
  • If you have a sealed/pressurised system, once the correct amount of inhibitor is added to the system, it should remain active for the life span given by the manufacturer or until the system is drained.
  • If you have a vented/open system, you MUST regularly check that the inhibitor in the system is at correct level for your system volume as evaporation may affect levels over time. failure to do so will invaldate your warranty.
  • Lastly, we always recommend that suitable trained/qualified individuals install and maintain your heating system.
  • All bush ends/caps will only be hand tight to allow customers to interchange if on a gravity fed heating system and need fitting correctly when installed.
  • A common cause of leaks is over tightening of the valve tails into the bush ends of the radiator. Over tightening will crack the bush. When fitting the valve tail into the bush, turn it finger tight, then using a spanner turn it until there is only moderate resistance. Using a 4” spanner it is difficult to over tighten. A thread sealant must be applied to the radiator end caps and to the valve tail threads to get a water tight seal. LSX sealant, which is available at most plumbers’ merchants, is recommended. PTFE tape is an acceptable alternative. The torque from an 8” adjustable spanner will be sufficient to create a good seal.
  • All valves and air vents/bleed valves to be fitted with an LSX sealant or PTFE tape.
  • NO caustic/corrosive/acidic plumbing compounds or liquids are to be used on or in any part of our radiators, our valves, or connections including aggressive flushing agents. Failure to not adhere to this will invalidate your guarantee.
  • On commissioning, the water in the system MUST BE cleaned to remove debris, flux & residues. Its should then be tested and if required, neutralised correctly following the use of any compounds etc if required using appropriate crystals or similar.
  • If your system requires flushing, we recommend the use of Fernox F3 followed by the use of F1 rust inhibitor, which unlike other chemicals are not acid based and should not affect seals. After treatments the water should be checked for a neutral PH between 6.5 - 8.5. System design, flushing and dosing must be in accordance with B5449, 1990. BS EN 12828: 2003 and BS 7593:2019.
  • Following this procedure, the system must be closed with a sufficient Corrosive Inhibitor suitable for the water quality in your system. Dosing tools must be used to ensure the minimum correct levels of inhibitor are present at all times to prevent corrosion and should take into account the particular metals within the system.
  • Appropriate inhibitor should be used in conjunction with manufacturer’s instructions and appropriate quantities must be used for the water content of the system. Failure to do so will invalidate your guarantee.
  • The use of water softener in the heating system can cause problems with the gasket seal and will invalidate any guarantee offered.
  • We do not advise using our cast iron radiators with an electrical heating element.

Guarantees & Condition of Sale

Our Cast Iron Radiators are guaranteed for a period of 10 years, Valves for 2 years and all other products (excluding reclaimed products or where specified) for 1 year from the date of the Purchaser’s invoice to be free from any manufacturing defects. The Company will replace any goods found faulty due to manufacturing or workmanship defects, free of charge within this period, subject to the following exceptions:

  • If the defect arises as a result of wilful damage, negligence, misuse, abnormal working conditions, failure due to incorrect installation or failure to follow our instructions;
  • If the buyer alters or repairs such products without our written consent;
  • If the buyer has not paid the Contract price for the Products by the payment date.
  • If the radiator in question has been supplied in parts to be fully assembled on site by the customer or their plumber.

Defective goods will be repaired or replaced subject to the following conditions:

  • The Buyer provides proof of original purchase and written notice of the defect immediately;
  • The company reserves the right to change only the defective part or section of a sectional radiator;
  • Consequential loss - the company is not liable to any consequential loss caused directly or indirectly by any defect in its goods including any costs of labour incurred by the Purchaser;
  • The benefit of this warranty is given to the first retailer purchaser of the goods and is not assignable.

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Contact Us

Cast Iron Radiator Centre
(a Division of Mossmead Ltd)
241 Torrington Avenue
(Corner of Padstow Road)
Coventry, West Midlands
0800 294 8603 / 024 7630 3999
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