DOWNLOADS To download, right click and choose “save target as”. Please note that Adobe Acrobat Version 7 or above is required to read the PDF Documents     LATEST ZYLO LITERATURE       Pipe Boxing and Casing Literature Version 10.2       Pipe Boxing and Casing Fitting Instructions Version 6.0               ZYLO GUIDES   A series of guides on pipework related topics available for free download.       Central Heating Systems briefly describes the common designs of central heating and hot water in domestic housing. Includes pressurised systems, combination boilers, water heaters, condensing boilers and underfloor heating.       Heat Loss calculator Step by step instructions on how to accurately calculate heat loss in order to determine radiator size and boiler power.       Heat Loss From Pipework Simple estimating tables of heat loss from unlagged steel and copper pipework.       Malleable Iron Fittings - metric dimensions of BS1256 fittings.       Radiator Calculator Estimate the heat output from a wide range of existing radiators and therefore select a modern replacement without resorting to complex heat loss calculations. Includes obsolete cast iron column, hospital pattern and old un-finned steel panel radiators.       Imperial and Metric Scale Rules and Protractor (download, print out and laminate)