Welsh Water main damaged by flooding in Carmarthenshire 24 December 2012 Last updated at 18:28 Around 10,000 homes in Carmarthenshire face possible water supply disruption due to a flood-damaged water main. Water tanks and bottled water have been distributed while Dwr Cymru undertakes a "difficult repair" on the River Towy. Welsh Water said on Monday: "Water supplies are not currently affected but we are asking our customers to use as little water as possible while this problem persists." Dwr Cymru said people with inquiries about supply should call 0800 0520130. Welsh Water said it was hopeful the problem would be fixed by the early hours of Christmas Day, and was "working round the clock." Abergwilli, Abernant, Alltwalis, Bancyfelin, Blaenycoed, Bronwydd Arms, Carmarthen, Cynwyl Elfed, Ffynnondrain, Glangwili, Horeb, Johnstown, Llandovery, Llangain, Llangynog, Llanllawddog, Llanllwch, Llanpumpsaint, Llansteffan, Meidrim, Peniel, Pontarsais, Rhydegaeau, St Clears, Talog, Tanerdy, Trawsmawr, Trevaughan Source: Dwr Cymru/Welsh Water "We are asking our customers to use as little water as possible while this problem persists, and not to store water, so the amount in the system will continue to provide a supply for as long as possible," said a spokeswoman. We are also topping up the system by delivery of water in tankers. It was described as a difficult repair due to the location of the damaged main and poor weather conditions earlier on Monday. The company hoped to update progress on its website. Peter Perry, operations director at Welsh Water, told BBC Radio Wales they were "planning for the worst" but there was enough water in the system to last until early on Tuesday and he appealed for people to help conserve supplies.