Smelly shower drain with waterless shower trap

mark23

I have a low-profile waterless trap for a shower. The drain smells bad (particularly during the summer). Does anyone else have the same experience. I do not know if this is due to it being installed badly or just that they have a tendency to smell. Perhaps I am replacing the rubber filter incorrectly?

Thanks

Tom44

Normally it due to dirt or hairs keeping the rubber one way seal open, try drain unblocking liquid, or let ready fill up with water, plunger over hole, then rapidly plunge it.

mark23

Tom44 wrote: »

Normally it due to dirt or hairs keeping the rubber one way seal open, try drain unblocking liquid, or let ready fill up with water, plunger over hole, then rapidly plunge it.

Yes, this image is kind of like the trap. I am able to remove the rubber seal and clean it. However the smell is still there.

freddyuk

The rubber membranes can go hard and stay open. I have these (Hepvo) on basin and bath and it was easy to check the the basin unit as I could see the valve was always open. I complained to manufacturers who sent me a replacement. A shower trap may be impossible to remove but if it can then sent it back.

mark23

freddyuk wrote: »

The rubber membranes can go hard and stay open. I have these (Hepvo) on basin and bath and it was easy to check the the basin unit as I could see the valve was always open. I complained to manufacturers who sent me a replacement. A shower trap may be impossible to remove but if it can then sent it back.

I can take the rubber trap out (it's like the picture in the previous post) and it seems to be sealed ok and not hard (the shower is a little over a year old). Could I not be setting it correctly??

mark23

I got a replacement trap and it resolved the smell! Thanks for a the advice

P2C

I had the same problems and ended up putting a U bend on the drain pipes outside. I had tried everything else. I had 3 showers and happened on them all

mark23

P2C wrote: »

I had the same problems and ended up putting a U bend on the drain pipes outside. I had tried everything else. I had 3 showers and happened on them all

So you put it at the bottom of the sewer stack at the base of the house?

P2C

Attached some pics. I had tried unblocking. Put a vent out over the fable of the house. Eventually put the U bends on the drain before it entered the sewer. It is a dormer.

mark23 wrote: »

So you put it at the bottom of the sewer stack at the base of the house?

Dardania

P2C wrote: »

Attached some pics. I had tried unblocking. Put a vent out over the fable of the house. Eventually put the U bends on the drain before it entered the sewer. It is a dormer.

Clever solution.

Any issues with it freezing?

P2C

No not to date.

Dardania wrote: »

Clever solution.

Any issues with it freezing?

mark23

Never really resolved this. It's a JT evolved tray (https://www.just-trays.co.uk/products/evolved-by-jt/) I think either waterless traps are useless or it was installed incorrectly - assuming it is neither, what else could it be? Wirquin (who make the membrane) say that it should block all smells.

mark23

Update years later. The problem was that the membrane was a slightly different shape than the one required. Very slightly but made all the difference. The standard wirquin membrane didn't work.