I have a cottage with an intermediate pressure gas main nearby. The
house used to be connected to the gas (30 years ago) but isn't any
longer. I have been quoted an absolute fortune for restoring the
connection, despite doing all the necessary trenching myself. It
seems to just require 2m of steel pipe, an emergency cut-off valve,
40m of MDPE and a gas meter.

I presume the ECV is an automatic flow limitor so it can be buried
underground without needing a manhole? The ones I've seen (Donkin
series 310) don't look as though they should be very expensive.

What might be a sensible charge for parts and labour? Any
suggestions?

Thanks
Roger