McAlpine, founded in 1902, have been the market leaders in plumbing supplies since manufacturing the first plastic trap in the UK in 1957. McAlpine study market conditions and listen to customer demand to develop the latest products. Manufacturing a huge range of plumbing products to exceptional quality, including: Traps, shower & floor Gullies, waste pipe & fittings, overflow pipe & fittings, WC connectors, air admittance valves and waste outlet fittings.