110 mm water less trap

[sheff paul]

fitting over flows from a break tank boosted cold water. can you get a water less trap bladder type to go inline with terrain solvent

 

[snowhead]

Where is the overflow going to end up?

 

[ShaunCorbs]

what size mate ? as if 110mm thats one big arse tank

 

[sheff paul]

what size mate ? as if 110mm thats one big arse tank

Having to direct it to a existing rain water 110 mm pipe,as its in a cellar with no floor drain,hence it has to be trapped to stop any smells ,no size data on the break tank,but at least 3000 litres

 

[ShaunCorbs]

Having to direct it to a existing rain water 110 mm pipe,as its in a cellar with no floor drain,hence it has to be trapped to stop any smells ,no size data on the break tank,but at least 3000 litres

What's your inlet pipe size?

 

[sheff paul]

What's your inlet pipe size?

2 x 54 mm ball valves,2 x 90 mm over flows,funny size I know

 

[ShaunCorbs]

That is an odd size 90mm, hope it's a female iron

https://www.plastics-express.co.uk/...&network=pla&gclid=CIDEg7Or1tACFVQ_GwodiUsHsQ

 

[sheff paul]

That is an odd size 90mm, hope it's a female iron

https://www.plastics Thanks Sha...tem we could find on line,we shall go with it

 

[ShaunCorbs]

That is an odd size 90mm, hope it's a female iron

https://www.plastics Thanks Sha... when it's overflowing so had to fit an alarm

 

[sheff paul]

It's the same as long as it's got a spring return else you won't be able to have any fall on it fitted a few tbh it's the only way you can get round it, but the problem I found is they can't tell when it's overflowing so had to fit an alarm

Good point,thats exactly what we come across,we are going to get an audible alarm linked to the facilities management company ,as they are 2 warning pipes in 22.5 mm in the tanks just on line with the main over flows

 

[chris watkins]

From Water Regs point of view I would say that you couldn't rely on the 110mm anti flood drain valve for back flow protection from the RW.

It Is not tested & not approved to prevent rain water which would be cat 5 from entering the basement & then the cisterns if the rain water system surcharged or blocked & then filled the basement.

I would recommend treating it as a below ground cistern installation & use a sump pump with the alarms to give warning of overflow / pump failure.

I know it is the costly option Paul but if this is cat 1 drinking water chance are someone may look at it.

 

[ShaunCorbs]

From Water Regs point of view I would say that you couldn't rely on the 110mm anti flood drain valve for back flow protection from the RW.

It Is not tested & not approved to prevent rain water which would be cat 5 from entering the basement & then the cisterns if the rain water system surcharged or blocked & then filled the basement.

I would recommend treating it as a below ground cistern installation & use a sump pump with the alarms to give warning of overflow / pump failure.

I know it is the costly option Paul but if this is cat 1 drinking water chance are someone may look at it.

It's rated for flood water so would think it would be ok

 

[chris watkins]

It's rated for flood water so would think it would be ok

OK for flood water exerting a house Shaun but it is still a mechanical device (single check) stopping category 5 water from back flowing into category 1 in the boosted cold water cistern albeit via the warning & overflow pipework.

 

[ShaunCorbs]

OK for flood water exerting a house Shaun but it is still a mechanical device (single check) stopping category 5 water from back flowing into category 1 in the boosted cold water cistern albeit via the warning & overflow pipework.

But that could be said for every warning / overflow / discharge pipe put into fowl waste ?

 

[chris watkins]

But the difference is in this cellar the risk is that the whole room could quickly fill with water, jump the air gaps back flow up the overflows & pollute the drinking water systems.

Not likely in other areas, at the end of the day it is assessment of the risk, if in doubt phone WRAS they are normal very helpful.

 

[ShaunCorbs]

But the difference is in this cellar the risk is that the whole room could quickly fill with water, jump the air gaps back flow up the overflows & pollute the drinking water systems.

Not likely in other areas, at the end of the day it is assessment of the risk, if in doubt phone WRAS they are normal very helpful.

See your point but it's going to be hard to find a pump that will be able to handle a 100mm water supply

But tbh I would think the place already has a sump pump for ground water etc so should be fine

 

[ShaunCorbs]

This looks better

[DLMURL="http://www.sustainabledrainagecentre.co.uk/110mm-double-flap-backwater-valve_p34896.aspx"]110mm Double Flap Backwater Valve - Sustainable Drainage[/DLMURL]

In combo with a sump pump incase the room floods in heavy rain

Agree or dis Chris ?

 

[CHRISX]

Hello All,

I would be wondering whether either of these Backflow preventers were AIR tight regarding preventing the smells / germs from the Drainage system entering the Tank / Basement ?

I thought that Drainage Backflow preventers just operated on any back flow of water - closing off under the water pressure - why would they need to be designed to be Air tight ?

Chris