22mm running trap for D2 pipework??

[SPC]

I went to a job recently where the D2 pipe discharged into a 110mm drain. on the D2 pipe approx 100mm lower than the tundish was a 22mm to 22mm self sealing trap it was clear plastic device with a lil spring loaded piece of plastic and washer in it and it worked perfectly when discharging water. The only method ive known to before was a hepworth trap but that device was pretty impressive. Anyone have any idea what its called as ive had no luck trying to source one of them.

 

[AWheating]

the hepvo valve can be used and has been tested and passed for this purpose. Never heard of any other device being approved for this purpose

32MM HEPVO SELF SEALING WASTE VALVE BV - Onplumb Ltd

 

[SPC]

yeh the hepvo valve is the one i was referring to and as you say tried and tested. but the other device looked effective and alot cheaper and less bulky to do the same job is was about 6 cm long, ill have to get a photo of it next time im at the job if no-one else has heard of them.

 

[AWheating]

try and get the name, i know the hepvo valve has been approved and building control will except this method.

 

[SPC]

there was no name on the product itself and i couldnt get hold of the installer easily so im on a mission to try and find out what it is, i knew i should of took a photo before but it just slipped my mind. ill be back there within a week or so tho so if i have no luck finding it ill get a photo!

 

[pobsdad]

It's designed to go on an overflow.And if the t+p goes,it will melt.

 

[AWheating]

It's designed to go on an overflow.And if the t+p goes,it will melt.

if this is correct then report the install to building control.(prob wont do much good tho)

 

[pobsdad]

Saw one a couple of weeks ago.Put it down to be changed,but I'm on holiday,so hope one of the other guys have been back to sort.

 

[Kimou]

The Hepvo valve is more commonly known as the fanny trap. I've seen the self seal overflow valve used on condensate pipes due to purpose made overflow pipe seals drying out and letting drain smells into property if left unused. Bad practice?