FAQs

How do i know i need a RATFLAP®?
You will benefit from the installation of a RATFLAP® if you have a rat problem inside your house or premises and there is no visible entry holes in your house above ground. The rat is entering and leaving daily unseen to feed in the main sewer via a damaged pipe.

What size RATFLAP® do i order?
Most modern plastic sewer pipes that service your property are of standard size in millimeters. If you do not know the exact size do not order a RATFLAP® until you have found out your size of your pipe. Ask at your local builders merchant or local authority drainage dept.

Older clay pipework will probably be measured in inches. Pipe sizes either metric or imperial are available but odd sizes may need to be made specially and may cost more than the standard.

The RATFLAP® does not place any stress on pipes and will not damage old delicate clay pipes during installation. The RATFLAP® is not suitable for chambers deeper than 3 meters.

How do i install the RATFLAP®?
Installation is very simple, just follow the packaged instructions that come with the device or view them online here but if you are unsure of the mechanics of sewer pipes ask for help from a competent person as installing the RATFLAP® in the wrong place can block your pipe at worst or not solve your rat problem.

If the depth of your inspection chamber is greater than 50 cm or 20 inches you will need to use the telescopic extension pole (sold separately) to place the RATFLAP® into the bottom of the chamber down to a maximum depth of 2.4 meters. Depending on the country you live in the RATFLAP® may have a stainless steel tether attached, this is to prevent loss of the unit should you inadvertently drop the unit into a deep inspection chamber, it must be screwed into the nearest available spot as your first step either inside the lid or to the inside of the chamber using the attached screw, see the animated graphic.

Where do i place the RATFLAP® to solve my rat problem?
The RATFLAP® must be only installed on your own property not in the public sewer system and is inserted into the last inspection chamber on your sewer line before it connects to the main pipe on the street. The latest version of RATFLAP® can be placed into a downstream position in your pipe or into an upstream position without removing any hardware, just make sure the arrow on top of the RATFLAP® is pointing in the direction that the waste water flows inside your sewer. If you are unable to install it yourself seek help from a competent person.

How often do i check the RATFLAP®?
The RATFLAP® is of very simple design and requires no maintenance once installed, i.e. it is a “fit and forget” unit. The clever design means no edges are presented to an intruding rat, they cannot gnaw away at the device. The RATFLAP® remains in place in the sewer, it is made of acid resistant stainless steel and will continue working for decades. If removed the rat problem will probably return in a matter of days unless the reason for rat entry i.e. a damaged pipe has been sourced and fixed. Despite what people like to believe or have heard from their friends, the maximum species weight of a sewer rat or (Rattus Norvegicus) is a very rare 500gr or 1.1 lbs for a large alpha male, most rats are only half this weight, therefor a rat cannot exert force onto the RATFLAP® to dislodge it so the only way it can be moved is by human hand.

Will the RATFLAP® cause pipe blockages?
The RATFLAP® has never caused a blockage during tests, if some unsuspecting person in the future attempts to “rod” the sewer from a different location along the pipe, the RATFLAP® will be dislodged upon retracting the rods but can be relocated into the pipe. Once installed in your sewer it will go on working for decades, this is because of its uncomplicated 2 piece design. Manufactured from high quality acid resistant 300 series stainless steel, the design is so sleek that it provides no resistance to the flow of waste and allows 98.5% of the volume of the pipe to be utilised for waste flow.

Will a rat leave my house when the RATFLAP® is installed, will I have to poison or trap it?
Rats almost always leave a house on a daily basis to feed as no food exists in your walls and attic, therefore the rat can pass through the RATFLAP® device but cannot return, the only issue that may arise is if your rat has nested and gave birth to pups which remain in your house, in this rare case they will have to be trapped using conventional rat traps as they maybe too young to leave.