OpenStreetMap
Another couple of these very odd markers marked with a capital V (or in this case SV): (MM#2; MM#3). All are stored on the OSM map as a “boundary_marker”, even though I’m certain that they are not. But what are they?
At the corner of Moore Road & Bennett Road; inscription is “SV”, then either “NCWW” or “NGWW”:
At the corner of Dale Avenue & Rowland Avenue; inscription is less clear:
The two markers are on a North/South axis, although that could be pure co-incidence.
Discussion
Comment from Stereo on 14 October 2016 at 13:51
A lot of the institutional knowledge and archives would probably have become lost in the privatisation, but it could always be worth asking.
Comment from Stereo on 14 October 2016 at 13:54
These people might know! http://www.papplewickpumpingstation.co.uk/contact_info.htm
Comment from EdLoach on 14 October 2016 at 14:43
I noticed concrete markers at the edge of our street at various points as I walked home from a cashpoint last night. They were all similar. One had SV on it, one (next to a fire hydrant) had WO and another had AV. A bit of Google searching (in particular a self lay pdf from Severn Trent) suggests they are to mark Sluice Valves, Wash Outs, and possibly Air Valves. These concrete ones have two numbers (like fire hydrants) marking diameter and distance. I’m guessing you’ve found an earlier version.
Comment from Maprapper on 14 October 2016 at 17:09
It looks to me like Service Valve Nottingham Corporation WaterWorks.
Comment from SomeoneElse on 15 October 2016 at 23:37
My money’s on “stop valve”…