Click to expand Tap to zoom Stihl Backflow preventer including 3/4" coupling SKU: BKFL-PRV3/4 Product Number: 4900 500 5700 Original price £72.50 - Original price £72.50 Original price £72.50 £72.50 £72.50 - £72.50 Current price £72.50 | / Quantity Add to cart Description Prevents water flowing back out of the high pressure cleaner into the drinking water supply. Specification Product Data