Drain fly problem.

[Andrew Dwyer]

So, as the title suggests am having a drain fly problem.

Have had this before ( maybe a couple of times over 6 years) but cured it with small moth balls and bleach down shower and bathroom drains, in the basin overflow and using a mosquito spray. But this time it is persistent.

 

3 bathrooms:

1 and 2 have similar usage, 3 is toilet and basin only.

1 and 3 have pretty much zero flies but number 2 is inundated.

 

Have cleaned down the walls with bleach and done the above procedure but a week now and no progress. No obvious signs of access, small window with mosquito net, 2 x drains with the typical Thai shallow trap ( topped up frequently with Haiter ).

 

To get the picture, this morning at 6.30 am had zero flies, at 10.30 am zapped around 10 but just now ( 6.00 pm ) zapped 165 flies, no activity in the bathroom since 6.30 am when the boy showered.

 

While it is quite pleasant zapping these flies with the electronic tennis racket it is wearing a little thin now.

 

Anyone any miracle cure or homemade poison that will cure me of this curse ??

[transam]

8 minutes ago, Andrew Dwyer said:

So, as the title suggests am having a drain fly problem.

Have had this before ( maybe a couple of times over 6 years) but cured it with small moth balls and bleach down shower and bathroom drains, in the basin overflow and using a mosquito spray. But this time it is persistent.

 

3 bathrooms:

1 and 2 have similar usage, 3 is toilet and basin only.

1 and 3 have pretty much zero flies but number 2 is inundated.

 

Have cleaned down the walls with bleach and done the above procedure but a week now and no progress. No obvious signs of access, small window with mosquito net, 2 x drains with the typical Thai shallow trap ( topped up frequently with Haiter ).

 

To get the picture, this morning at 6.30 am had zero flies, at 10.30 am zapped around 10 but just now ( 6.00 pm ) zapped 165 flies, no activity in the bathroom since 6.30 am when the boy showered.

 

While it is quite pleasant zapping these flies with the electronic tennis racket it is wearing a little thin now.

 

Anyone any miracle cure or homemade poison that will cure me of this curse ??

Are your shower drain-outs equipped with a water or flap seal when not in use...?

 

Fly's usually mean something is dead, are there any smells......?

[novacova]

Try using sodium bicarbonate (baking soda) wash about a cup down the drain once a week. Sounds like a septic system?  If so it will get rid of the odor. 

[Andrew Dwyer]

4 minutes ago, transam said:

Are your shower drain-outs equipped with a water or flap seal when not in use...?

 

Fly's usually mean something is dead, are there any smells......?

Yes, each shower has a water seal and another drain in each room has a seal also, I keep them topped up as know the water evaporates quickly.

No smells.

[Andrew Dwyer]

6 minutes ago, novacova said:

Try using sodium bicarbonate (baking soda) wash about a cup down the drain once a week. Sounds like a septic system?  If so it will get rid of the odor. 

Okay, thanks, will try that now.

[transam]

1 minute ago, Andrew Dwyer said:

Yes, each shower has a water seal and another drain in each room has a seal also, I keep them topped up as know the water evaporates quickly.

No smells.

Hmmmm, that is unusual. Last week I had a shower drain blockage, went to our local hardware, and he said this will clear it, well it would clear and kill off anything.

 

Sodium Hydroxide (Caustic Soda), dodgy to use, but did the job, 50bht....🤗

[novacova]

24 minutes ago, Andrew Dwyer said:

1 and 3 have pretty much zero flies but number 2 is inundated.

The larvae is hatching from somewhere probably from a cranny you may have missed? Edge of the window screen or ceiling vent?

[Andrew Dwyer]

6 minutes ago, novacova said:

The larvae is hatching from somewhere probably from a cranny you may have missed? Edge of the window screen or ceiling vent?

Yes, believe me i have searched under the sink and in every corner of the room but behind the toilet is the only place i don’t have good access to that’s why i was hoping to discover, via this thread, a spray that is good for these little blighters !!