As the valves are one way, they do not stop anything from exiting the pipes in the usual way. After your sewage has freely left the pipe, the valve closes up again automatically.

The first and most important advantage of using it is that once it is fitted inside your drain, you can be sure that rats will never be able to enter your home .Proper storage and disposal of house-hold garbage and dead animals is a very important part of rat control. Bulk dumpsters are often left with the tops open, or the tops are badly bent, allowing rodent entry. Constant vigilance and calls to the refuse company should correct these situations. Seal bulk trash compactors from rodents. Spilled refuse and juices from crushed contents often create rodent problems under and behind compactors and bulk dumpsters. Clean these areas of-ten and install rodent screening in container drains. Doors should fit tightly, the distance between the bottom of the door and the threshold not exceeding 1/4 inch (0.6 cm). In some instances, it is possible to build up the threshold rather than modify the door. Rodent Barrier– the combination of knitted stainless steel mesh and our unique resilient epoxy resin provides a flexible yet sturdy barrier to prevent rodents chewing through to exploit expansion gaps. Store food products in rodent-proof enclosures or on shelving at least 18 inches (46 cm), but preferably 30 inches (76 cm) or more, above the floor. Tubular supports (legs) for shelving should be a minimum of 4 inches (10 cm) in diameter to prevent rats from shinnying up from the floor. The Rat Barrier was initially developed to help combat flooding problems in the UK but is now being used to prevent rodent ingress into buildings, both commercial and domestic. The valve is now used to prevent the following:

Rats typically burrow and nest under feed bunks that are placed directly on the ground or near ground level. Properly designed concrete bunks that sit tightly on a concrete base eliminate rodent habitat. Though cattle traffic may discourage burrowing under the concrete slab, a foundation may be needed to prevent burrowing around the sides of the slab that do not receive heavy cattle use. Concrete slabs on which feed bins are placed should have foundations extending 36 inches (91 cm) into the soil at the outer edge to prevent rats from burrowing under the slab. Installing heavy gravel and maintaining a clean, weed-free zone around the perimeter of the slab will also discourage rat burrowing and permit easier detection of rat activity. Maintaining a clean, 3-foot-wide (1-m) weed-free area around building foundations, concrete slabs, and footings often discourages rodents from burrowing as well as eliminates a food source and attractive harborage. Where erosion of bare soil is likely, this buffer can be maintained by regular, close mowing of vegetation or by installing heavy gravel. To discourage burrowing, install a strip of 1-inch-di-ameter (2.5-cm) or larger gravel laid in a band at least 2 feet (60 cm) wide and 1/2 foot (15 cm) deep. 1/4″ mesh Targeted Rodent Proofing– by preventing rodent ingress in these vulnerable areas and removing opportunities for them to nest and find refuge, you minimise the risk of pest activity and limit the potential spread of infestations inside your premises. Rodent-Proof Construction | Rodent Entry Points | Rodent Exclusion Methods | Rodent-Proof Construction | Rodent-Proof Resources | ICWDM | Wildlife Species InformationPlease note; this model is made of a high grade plastic, but a determined rat can, and will, chew through plastic. Although this is very rare, it is possible. If this this concerns you, you might like to consider a more expensive stainless steel model (see below in ‘you may also like’ products). Flexi Armour Expansion Joint Proofing– this resilient yet flexible proofing solution eliminates the gaps in expansion joints on floors and walls in larger premises, preventing rodents chewing through and entering the voids. Rentokil’s Flexi Armour range provides sustainable rodent proofing solutions to help protect buildings internally and externally. By utilising hard wearing, flexible Kevlar and knitted steel mesh, Flexi Armour provides impenetrable barriers that prevent rats and mice entering your premises. An integral part of the Flexi Armour Range is the rodent door proofing solutions we offer for both pedestrian doors and commercial roller shutter doors. These door proofing options offer a sustainable approach to Integrated Pest Management by restricting rodent intrusions into your business. Figure 15. Left: A curtain wall made of concrete will prevent rats from burrowing under foundations to gain entry to buildings. Curtain walls can be installed on existing buildings. A horizontal footing extension often deflects burrowing rodents away from structures. Right: Feed sheds, corn cribs, and other existing wooden structures can be rodent-proofed by installing hardware cloth topped by a band of sheet metal. The hardware cloth can also serve as a curtain wall to prevent rodent burrowing.

There are many points of potential entry into a building for a rodent. One of the reasons businesses develop pest problems is because they don’t fully rodent-proof their premises’. Proofing is always the first line of defense against rodent infestations. The Flexi Armour rodent proofing range of door seals provides effective proofing measures, to help prevent the entry of rats and mice and reduce the risk of a rodent infestation developing on your premises. Mice can fit through surprisingly small spaces. As such, we recommend mesh that has a hole size no greater than 6 mm x 6 mm. As a general rule of thumb, if you can get a biro through a hole a mouse can fit through too. If you’re not looking to stop rats and mice are the only concern then our galvanised mouse mesh will likely do the job. This can be bought in our online shop here. Mouse mesh should always have a maximum hole size of 6 mm x 6mm.

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Rats are great at climbing and swimming, and can hold their breath for long enough that it allows them to travel from one location to another through sewage pipes and drains. Whats The Advantage Of Using A Rat Flap? Figure 22. Guards can be used to prevent rats from climbing augers, pipes, or wires leading to buildings. Footings or foundations for grain bins should extend into the ground to prevent rat burrowing. Rats can access buildings via the drains and drainage valves or rat flaps can be employed to combat this issue Since the 1950’s drainage systems have been much less isolated from the main street sewer and this has allowed rats more access into peoples drainage systems. Damaged or unmaintained storm drains and sewer pipes easily allow vermin access into the main drainage systems. From here they can enter your home by travelling through sewers, up pipes and exiting from the foul air outlet at roof level or swimming through the water contained in your toilet system. The MultiFlap ensures you’re protected by keeping them in the sewers where the authorities can deal with them. When rats or mice are present in a building, attention must be given to interior as well as exterior rodent-proofing to remove all sources of shelter. A combination of actions is required in such instances, as no single effort is likely to yield the desired result.

It is a highly affordable way to stop rats from entering your home through the toilet. The price of the unit itself plus our charge for fitting is extremely cost-efficient. All vents and duct openings for heating and air conditioning should be screened or raised and/or guarded with an excluder device to prevent rodent entry. Residential cold air return grills can easily be mouse-proofed by placing 1/4-inch (0.6-cm) hardware cloth behind the grill where it is not unsightly. In some applications, power vents can be covered with hinged metal plates (louvered) that open with air flow and close when fans are off. These louvers are only effective if they fit tightly and the sides are recessed to prevent rodents from pushing through them. Caution: Hardware cloth less than 1/2 x 1/2 inch (1.3 x 1.3 cm) significantly reduces air flow. In buildings where ventilation is already marginally adequate or inadequate, such further restrictions may be unacceptable. In some locations, small mesh screens can become clogged with dust or freeze over. In such situations, the use of 1/2 x 1/2-inch (1.3 x 1.3-cm) hardware cloth is a reasonable compromise between ventilation requirements and rodent control. Firstly, it is very important to note that rodent mesh is not the same as insect mesh. These meshes are not interchangeable. Rodent mesh is relatively much tougher. Rat mesh and mouse mesh is also more expensive because it contains more metal. Conversely, insect mesh is cheaper, lighter, is woven with fine wires and has much smaller holes. Rats and mice will gnaw through insect mesh with ease. Rat Mesh Caution: letting metal siding rest directly against concrete can lead to accelerated rusting and corrosion. The siding should be installed so that openings are no greater than 1/8 inch (0.3 cm) wide. If the siding is installed with the ribs horizontal, the ends must still be sealed or the bottom of the decorative corner trim flashed and closed. Below, we have outlined the properties of some commonly employed meshes. These include mesh to prevent the passage of rodents (both rats and mice), insects (including specifically midges) and for use in beekeeping applications. Of note, much of the information below has been advised to us by the British Pest Control Association (BPCA). Rodent Mesh (rats and mice)

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Rodents often gnaw into wall materials at corners or where joints in construction materials provide an edge. Poor construction techniques may allow rodents to gain access through materials that are otherwise considered rodent-proof. Ideally, you can control rodents by making it impossible for them to gain entry to your home. However, it may be difficult to exclude mice completely since they can pass through ¼ inch openings, approximately the width of a pencil. Rats can squeeze through ½ inch openings.Our Rodent Proof Wire Mesh and Mouse Mesh products are ideally suited to these applications The MultiFlap is a one-way non-return valve that fits easily to the exit pipe from your house to the street sewer. This means waste still goes out from your house, but immediately after the waste water has gone, the flap closes to prevent anything nasty coming up the wrong way. The prevention method and the ease with which the MultiFlap can be installed makes these products truly unique. Standard insect mesh (aka fly mesh or flymesh) has a hole size of 1.36 mm x 1.36 mm. This is small enough to stop the vast majority of unwanted insects, including flies, mosquitoes, wasps and bees. Insect mesh is available to buy in our online shop insect mesh category. Soffit Vent Mesh Flexi ArmourBuilding Seal Mesh - is a highly corrosive resistant, flexible, galvanised stainless steel knitted mesh which can be swiftly installed around the perimeter of cladded buildings as an impenetrable barrier to rodents.