Har du brukt StarSan på koplingene? Ser at noen anbefaler det til lekkasjetesting. Plasten liker nok dårlig at rester av syre blir liggende igjen.
Dette skriver John Guest i katalogen sin:
"Cleaners and Sanitising of Fittings
The external surfaces of John Guest products must not come into contact with oxidising or acidic cleaners and sanitising agents, for example (but notlimited to) those below pH 4, high in sodium hypochlorite level (bleach) or containing hydrogen peroxide. Our plastic material suppliers recommend ECOLAB Oasis 133 as a suitable cleaner for the external surfaces ofproducts manufactured by John Guest.
Several different methods exist for sanitising the internal surfaces of fluid systems, including sodium hypochlorite, hydrogen peroxide, chlorine dioxide or ozone. It is entirely the responsibility of the end user to determine if the chosen method is suitable for use with John Guest products over the plannedworking life of the system. However, to avoid unnecessary early failure, JohnGuest requires that the disinfection solution must be immediately flushed out at all draw off points with fresh, wholesome water at the end of the disinfection period. The solution must not be left in the system. Disinfection solutions must only come into contact with the internal (fluid carrying) surfaces of the system. If any other surfaces of a fitting come into contact with disinfection solution the whole fitting must be replaced immediately. Polypropylene fittings offer greater resistance to aggressive chemicals than Acetal fittings but do not have the same mechanical properties. John Guest polypropylene fittings are generally designated by the part number prefix PP or PPM."