10000litre tank filling from mains

[farmer dave136]

Hi I’m ordering a new tank to fill the crop sprayer would put a ball cock in it but I know the water board don’t like tanks connected direct to the mains for fear of it running back into the mains if they loose pressure is there a simple way of doing it you can order the tank with a weir but it makes the take 50% dearer????

 

[farenheit]

Surely if the mains pipe is at the top of the tank then its not going to flow back? Maybe have a big overflow outlet just below the level of the mains pipe coming in?

 

[Pingu]

Hi I’m ordering a new tank to fill the crop sprayer would put a ball cock in it but I know the water board don’t like tanks connected direct to the mains for fear of it running back into the mains if they loose pressure is there a simple way of doing it you can order the tank with a weir but it makes the take 50% dearer????

As long as when water is off aka tank full the outlet from Ball cock is couple inches away from water line then they are happy well Anglian water were. So I just bent down the bar the ball sits on So kicked off sooner.

 

[Sharpy]

If you are worried about this then set up a header tank fed by the mains then feed the main tank with a low pressure hi flow ballcock. Set up right fill times will be no different.

 

[AndrewM]

our hot water tank in the dairy is filled via small float valve in its own little box at the top of the tank.

 

[Boomerang]

As long as when water is off aka tank full the outlet from Ball cock is couple inches away from water line then they are happy well Anglian water were. So I just bent down the bar the ball sits on So kicked off sooner.

That's what I thought , and did , but the stroker from the water board had other ideas refused to accept it was impossible for mains to be contaminated, even though I also had a non return valve , and a physical break in pipework to the mains. He insisted it was his way or prohibition notice, absolute jobsworth.

 

[Neddy flanders]

no-return valve. £15?

 

[Wheatland]

You can buy a non return valve to fit into the supply. I was advised to step up to a 32mm one in our 25mm supply to not restrict flow

 

[SRRC]

A standard ball valve will have the air gap they are looking for, if you include a non return valve in the supply as well then they will be delighted.

 

[bigw]

We have had a water inspection and the guy doing ours said that the best thing to do was to cut out a hole below the ball cock fitting so water would pour out of the tank instead of going back down the mains. He said a square hole is best as a round one could be blocked by the float if it came off. A non return valve wasn't acceptable as it could fail.

 

[principal skinner]

Needs to have an overflow in the tank below the ball cock level so that water can never reach the ball cock. Only a letter box shaped hole would suffice according to the water board inspector here as somebody could put a ball in the tank which would possibly block a round hole!

 

[melted welly]

We have had a water inspection and the guy doing ours said that the best thing to do was to cut out a hole below the ball cock fitting so water would pour out of the tank instead of going back down the mains. He said a square hole is best as a round one could be blocked by the float if it came off. A non return valve wasn't acceptable as it could fail.

this

airgap and square overflow couple inch below inlet. If he doesn’t accept it, he’s wrong

 

[Paul E]

A non return valve wasn't acceptable as it could fail.

Ah. A fail safe system fails when it fails to fail safe.

 

[TripleSix]

Hi I’m ordering a new tank to fill the crop sprayer would put a ball cock in it but I know the water board don’t like tanks connected direct to the mains for fear of it running back into the mains if they loose pressure is there a simple way of doing it you can order the tank with a weir but it makes the take 50% dearer????

Our 10000l tank at work had to have 3 big holes drilled 3 inches lower than the ball valve to conform to water regs.

Not a big issue.

 

[Blue.]

Tell them it’s spring fed.?

 

[Brisel]

I bought a 22000 litre plastic tank last year for treated water for the sprayer. Non return valve fitted, the ballcock is below the outlet and I have a letterbox shaped weir near the ballcock (not too close or you get a bit of water coming out of it). Easy enough to drill out and shape with a hacksaw blade. The weir can be at least 10x the size of the pipe feeding it to keep the inspector happy enough.

 

[colhonk]

Has anyone actualy had water sucked back up the mains pipe?. My pipe is nearly a mile long,would have to be a hell of a suction to get back past the meter.

 

[Steevo]

Has anyone actualy had water sucked back up the mains pipe?. My pipe is nearly a mile long,would have to be a hell of a suction to get back past the meter.

Not just that, but when the water companies get a leak.....do they suck the pipes out and disinfect having done the repair before restarting the flow?

One rule for one....

 

[Wombat]

Not just that, but when the water companies get a leak.....do they suck the pipes out and disinfect having done the repair before restarting the flow?

One rule for one....

We had a new meter fitted to the house as the last one packed up again. Just got a card with a “as we changed your meter your water might be a bit cloudy/dirty so if it is just run it till it’s clear.

 

[rob h]

We had a inspection from water company last year. Had to put a hole in the tank just below ball cock.then he wanted to see the pressure washer now we can’t connect it directly to a tap.it has to feed out of a tank with a ballcock and a hole just below.we said what about the thousands of people with them at houses and he said they don’t need them