The boys at asap are excellent. Need an anual service for your boiler .we can help. Sat.-sun | 7am - 2pm, 5pm - 12am. Combi my 70 yo mother has just swapped to one and had her immersion removed she can't believe the constant hot water even though we've been telling her for years. Watersafe is made up of seven approved contractor schemes, which all offer information and advice for people thinking of joining the industry. During a.