Is it safe to use Inhibitors or other plumbing compounds?

It is very important that the Ph of your heating syatem is maintained between 7-8.5 at all times to prevent gaskets breakdown in valves or radiators. Failure to do so will invalidate your warranty. Ph neutral inhibitors are fine to use & MUST BE USED to the correct dosing levels, but NO caustic/corrosive/acidic plumbing compounds or liquids are to be used on or in any part of our radiators, our valves or connections and that if aggressive flushing agents are used, the water in the system MUST BE immediately neutralised correctly following their use appropriate crystals or similar and certificated as such. Where caustic and/or corrosive compounds (liquid or other) have been introduced into the radiator(s) which have caused damage to seals/gaskets, or the use of insufficent amounts of Inhibitor are found, this will invalidate any guarantee offered. PLEASE SEE OUR FITTING GUIDELINES FOR FURTHER INFORMATION.