because backpacks are in general a total faff - your scenario presumes that you only ever have 1 house per stop and of a small size where half a backpack will last - what happens when you have 2 maybe 3 houses spread over a street say 70 meter radius and are detached 5 bedders are you really going to use a backpack do a house come back fill track back again ??
then you win a contract for a moderate size care home - constantly returning to the vehicle to fill up and as posted what about first cleans ? ( these usually take double if not three times the water to clean )
thats what i mean about limiting potential ( easiest way of working for you and staff )
I think the bolded part is the impotant bit, that describes my round to a tee. I dont do any commercial, any only half a dozen jobs big enough to empty a full backpack on.
Yes i know they are a faff, i hate using mine when its full, but i only use it for terraced houses and a very few limited access jobs, its very heavy when full, i hate humping it and out etc. I only use mine half a dozen times a month thankfully.
On my work i only have one house per stop for 99% of the round, i can only think of two stops i make that have more than 1 house!, and would think just about all of mine are do able with 1 full backpack, or certainly they are all do able with one guy on a backpack the other hose.
yes first cleans would be the exception, but again if one guy is round the back and the other is backpacking the front im sure it wont slow us down that much if he nips back and refills.
I understand what you are saying, but maybe it depends on what work you have, i think it would work fine on my round.
My thinking is yes a full backpack doing a full house is slower and harder than a van mount but pulling outside a property half filling it and walking maybe 10m to the front would take about the same time as unreeling hose, maybe pulling it round a few obstacles to the back of the house.
Maybe im wrong but i wouldnt dismiss it without giving it a go anyway.