Water tank Connector 10mm - G25155 Water tank connector 10mm. Twin Bolt Rubberised seal. Water Tank Fitting £3.50 inc. VAT Quantity: at £3.50 each Add To Basket Fix to bucket/25l drum, any plastic water container to create a reservoir. Just create a 11/12mm hole! Place the fitting through the hole. Place one nut either side of the plastic and tighten.