Shower Trap vs HepVO

[Charlie]

Could somebody please explain the difference between

- a low profile shower trap

- a HepVO waste valve

Illustrations can be found at the following URLs

[Rod Hewitt]

"Charlie" wrote in news: [e-mail]:

This seals the room air from the foul air in the drains.

A HepVo is simply a bit of pipe with a special thin membrane in it that closes by itself and opens when there is any water to pass. This seals the room air from the foul air in the drains.

The HepVo might achieve a higher flow rate. It has far fewer restrictions on installation (e.g. angle of pipe), cannot freeze, cannot fail by loss of water (none there to lose), etc. It is probably a bit more expensive.

We have three HepVo traps and one ordinary one on the kitchen sink. If changing that I might go for a HepVo there as well.

[Lobster]

Blimey, not taking any chances then, eh?! ;-)

David

[Mathew J. Newton]

We used to have a low profile trap on our bath which suffered from a couple of problems. Firstly, the (shallow) water in the trap would evaporate if we were away for over a week thus opening up the smell of the drains to the room. Secondly, a washing machine was plumbed in downstream of this trap resulting in occasionally emptying of the trap due to the negative pressure of the water flowing past/beyond it.

Replacement with a HepV0 valve cured both problems. I seem to recall it was even more 'low profile' than the low-profile trap and hence may be even more beneficial to your application.

Mathew

[Rod Hewitt]

Lobster wrote in news:LxxNd.1165$ [e-mail]:

They're so good!

Now listen carefully - one on bathroom basin, one on bath and one on downstairs basin. Is that better? :-)