He needs to make sure there is no water left in pump
and hose from pump is empty of water.
We have started removing pumps from vans in these conditions.
Also remove hoselock or whatever connectors he uses.
We run pumps dry for a few seconds then remove them.
Replace them in the mornings -couple of minutes and hey presto.
He should then be free to operate until his hose reel or
pole hose freezes. :
