"zaax" wrote in message
...
Why can't I install fire sprinklers myself?

Because your Insurers will require an LPC registered company to design and
install them, to make sure in the case of a fire that the loss or damage
through fire is not offset by the amount of water damage. Otherwise your
insurance could be null and void.

The installation would need to be properly calculated, to make sure the town
main has sufficient water flow at a given pressure and pipework sizes are
sufficient, dependant upon the hazard rating set by the insurers.