Coupler 1" for Normal Gauge water fitting water fitting Inc VAT € 7.85 €6.62 Quantity: at €6.62 each Add To Basket 0 in your basket View Basket Checkout 1"Coupler water fitting for Normal Gauge water pipe. Change the red collet to blue for heavy gauge pipe. Wrc Tested and certified. 16 bar. water coneenction.