Compare Quick view Standpipe With Double Check Valve MSRP: £46.95 (Ex. VAT) MSRP: £56.34 (Inc. VAT) For temporary water supplies on building sites Fitted with a brass 3/4” Hose Union Bib tap to BS1010. Also fitted with a brass Double Check Valve to BS6282. WRC (Water Research Council) approved. Hydrant Base is 2.1/2” London Pattern which ... Add to Cart Add to Cart