If the water pipes leading to your house are lead,can you ask water board to change them free of charge?

I am living on a low income. I qualify for a warm front grant to get a boiler and heating improved in my home I was told that this can not go ahead because the water pressure is to low,the original old lead pipes carring my water supply need replacing. i can not afford to pay a plumber to do this,is the water board obliged to do this.