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The "H" in the model’s name indicates this is a high temperature rated Caleffi pressure reduction valve at 80°C VS the standard Caleffi at just a rating of 40°C
Each valve is individually tested and calibrated to ensure that it meets the correct pressure specifications
the wax contracts sufficiently enough to compress the string and open the FPV valve seat causing a water leakage from the solar hot water panels
The 500kPa is a nominal outlet pressure rating under Australian Watermark Standard testing condition with a set inlet pressure
DEKS DFE109B 230-508mm Dektite Metal Roof Flashing Pressure Control Valve The "H" in the model’sOverview The DEKS DFE109B Dektite Premium #9 is a high performance flashing solution designed for roof penetrations ranging from 230508mm (920"). Suitable for pipes, poles, chimneys, and rangehood installations, it features a flexible aluminium base that conforms easily to various roof profiles, including corrugated surfaces, ensuring a secure and customised fit. The UV rated Black EPDM rubber boot provides a watertight seal and exceptional durability
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