thanks for replying, take your point also will the water flow quick enough eg isI did use an old slurry tanker once , as a water bowser . trouble with it was that the acid in the slurry had taken the galvanising off the tank , and even though it was thoroughly washed out it very quickly went rusty and delivered most un appetising looking water to the drinkers .
Only if they start pushing around the trough 'cos its empty and bend itNo problem with water flow , so long as there is any head at all . It possibly will run more slowly , but will that matter to the cattle ?
Do not take the water from the bottom of the tank a couple of inches at least above, 6 would be better.I would be nervous about bacteria lurking in the tanker as well as the rust thing - lumps of rust block ball cocks even the low pressure, large holed variety.
I think there is a danger that some ignorant townies will think that you are carting slurry in the morning and water to the cows in the afternoon. Dont be surprised by idiot comments on Facebook about it. Maybe best to stick large. sign on it fresh water onlythanks for your advice, maybe starting to go off old slurry tanker, i did wonder are rer ashave never seen any sitting in fields doing that job.