Wonder if throwing a handful of moth balls help?

It might. They hate that stuff and it works on snakes too.

Frogs hate: Citric acid, vinegar, and moth balls that I know of. Crush the mothballs, mix all three together maybe?

There's another way that's cruel and I wouldn't do it or post it.

Cheers

I'll give that a go. Where do you buy mothballs?

You can get mothballs from supermarkets, usually at the air freshener section. Those white ones smells stronger.

Edited April 12, 201511 yr by Cpkt8

Just re read your OP. The drain is under your courtyard, yes? Does the laundry lady have a right to use your drain? Can her water be diverted around your property?

Can it be covered between the two buildings?

Without seeing the drain, it's hard to come up with more solutions. Any chance of some photos?

The drain is under concrete with open grate areas running about half the total length. I don't know about the legalities of the laundry lady using the storm drain which is under the courtyard between 2 rows of townhouses (back of mine). She doesn't have any other alternatives for her drain water.

I just found out that builders (doing renovation) at one of the downstream townhouses have caused the blockage (I've been away 5 months, so I didn't know what was going on), possibly by washing cement into the drain. We will talk with them when they come back after Songkran. If we can clear the blockage there won't be sitting water and the problem will be solved and they'll only be singing after heavy rain.

The THAI builders washed concrete into the drain blocking it- why am I not surprised!

If all else fails, you could replace the grills with concrete covers ( with holes for the water ) like you see all over Thailand. That would cut down the sound.

Personally I'd try flushing the drain with a water blaster before doing anything else.

Just re read your OP. The drain is under your courtyard, yes? Does the laundry lady have a right to use your drain? Can her water be diverted around your property?

Can it be covered between the two buildings?

Without seeing the drain, it's hard to come up with more solutions. Any chance of some photos?

The drain is under concrete with open grate areas running about half the total length. I don't know about the legalities of the laundry lady using the storm drain which is under the courtyard between 2 rows of townhouses (back of mine). She doesn't have any other alternatives for her drain water.

I just found out that builders (doing renovation) at one of the downstream townhouses have caused the blockage (I've been away 5 months, so I didn't know what was going on), possibly by washing cement into the drain. We will talk with them when they come back after Songkran. If we can clear the blockage there won't be sitting water and the problem will be solved and they'll only be singing after heavy rain.

The THAI builders washed concrete into the drain blocking it- why am I not surprised!

If all else fails, you could replace the grills with concrete covers ( with holes for the water ) like you see all over Thailand. That would cut down the sound.

Personally I'd try flushing the drain with a water blaster before doing anything else.

The grates are necessary to drain the courtyard and driveway during rain. Clearing the drain will be the first option.

Just re read your OP. The drain is under your courtyard, yes? Does the laundry lady have a right to use your drain? Can her water be diverted around your property?

Can it be covered between the two buildings?

Without seeing the drain, it's hard to come up with more solutions. Any chance of some photos?

The drain is under concrete with open grate areas running about half the total length. I don't know about the legalities of the laundry lady using the storm drain which is under the courtyard between 2 rows of townhouses (back of mine). She doesn't have any other alternatives for her drain water.

I just found out that builders (doing renovation) at one of the downstream townhouses have caused the blockage (I've been away 5 months, so I didn't know what was going on), possibly by washing cement into the drain. We will talk with them when they come back after Songkran. If we can clear the blockage there won't be sitting water and the problem will be solved and they'll only be singing after heavy rain.

The THAI builders washed concrete into the drain blocking it- why am I not surprised!

If all else fails, you could replace the grills with concrete covers ( with holes for the water ) like you see all over Thailand. That would cut down the sound.

Personally I'd try flushing the drain with a water blaster before doing anything else.

The grates are necessary to drain the courtyard and driveway during rain. Clearing the drain will be the first option.

You must have missed "( with holes for the water )". Most drains in Thailand have them and they seem to work. It's not necessary to have a steel grating.

The grates are necessary to drain the courtyard and driveway during rain. Clearing the drain will be the first option.

You must have missed "( with holes for the water )". Most drains in Thailand have them and they seem to work. It's not necessary to have a steel grating.

The grates are absolutely necessary here. When it rains heavily all the water from the street flows down the driveway and covers the entire courtyard. If you covered the grates and made holes the 3 townhouses with entrances in the courtyard would flood. Even with the grates,

The grates are necessary to drain the courtyard and driveway during rain. Clearing the drain will be the first option.

You must have missed "( with holes for the water )". Most drains in Thailand have them and they seem to work. It's not necessary to have a steel grating.

The grates are absolutely necessary here. When it rains heavily all the water from the street flows down the driveway and covers the entire courtyard. If you covered the grates and made holes the 3 townhouses with entrances in the courtyard would flood. Even with the grates,

Is it your property? If it was mine I'd be laying a concrete hump to keep the street water out. Sounds like a very badly designed drainage system.

Also, if the builders obstructed the drain with concrete it would reduce the throughput of water, contributing to the flooding that you are experiencing.

The grates are necessary to drain the courtyard and driveway during rain. Clearing the drain will be the first option.

You must have missed "( with holes for the water )". Most drains in Thailand have them and they seem to work. It's not necessary to have a steel grating.

The grates are absolutely necessary here. When it rains heavily all the water from the street flows down the driveway and covers the entire courtyard. If you covered the grates and made holes the 3 townhouses with entrances in the courtyard would flood. Even with the grates,

Is it your property? If it was mine I'd be laying a concrete hump to keep the street water out. Sounds like a very badly designed drainage system.

Also, if the builders obstructed the drain with concrete it would reduce the throughput of water, contributing to the flooding that you are experiencing.

It is a complex of 13 individual townhouses.

Badly designed? That's no surprise here is it? There is a hump, but all the street's water comes barreling down the driveway when it rains heavily. The hump keeps the water out in light downpours, but you'd have to build a wall across the driveway to prevent it from coming down when it rains heavy, but that would in turn flood the townhouses past the wall, so all you can do is make it someone else's problem downstream - The street resembles a river in heavy rain. The street has a slope in the direction of the townhouses so unless the street is reconstructed with storm drains there is no solution. I have buckets of sand from upstream deposited in front of my entrance after every heavy shower.

When I moved in there was an empty lot next to me upstream which collected all the water, but that area is now a condo and they pass the water downstream.

dettol is great on them, used it on cane toads in oz, killed the buggers if they were in a bucket and couldnt wash it off

, put some in a water pistol and squirt them.

The trouble is these guys are mostly submerged other than their head or top of their back. They can instantly duck under the water surface to wash it off.

you could always tip a cup or so of it directly in the drain, it would mix in with the water which would make them move on plus take away any bad smells coming from it, it sends water a milky colour

dettol is great on them, used it on cane toads in oz, killed the buggers if they were in a bucket and couldnt wash it off

, put some in a water pistol and squirt them.

The trouble is these guys are mostly submerged other than their head or top of their back. They can instantly duck under the water surface to wash it off.

you could always tip a cup or so of it directly in the drain, it would mix in with the water which would make them move on plus take away any bad smells coming from it, it sends water a milky colour

LOL. There's a lot of water and Dettol is expensive. I have tried some other solutions, but I won't go into details as I don't want to upset the animal rights people on here.

As it happens, the drains have dried up somewhat over the last 3 days and I haven't heard them for 2 nights.