What is the difference between a service and isolation valve?

What is the difference between a service & isolation valve?

Service & Isolation valves are an essential part of a bathroom suit. Both valves are available in a straight or bent form and can come rigid or flexible on a short pipe. In the UK, the fittings come in a 15 or 22mm size and varies from country to country.

Remember to place a fibre washer in the service valve!