Weep Hole Product List and Ranking from 4 Manufacturers, Suppliers and Companies

KM-style Weep Hole Series

Prevent cracks in structures and uneven settlement or uplift caused by buoyancy pressure and scouring effects from infiltrated water and infiltration flow!

Features of our Weep Hole (Backflow Preventer and Flap Valve) 1. Can be used for both the bottom and side wall. 2. Easy to install as there is no need to align the product's orientation during construction. 3. The rubber valve, which is essential for water stoppage, can be replaced. 4. We manufacture longer types of weep holes according to the specified length based on concrete thickness. 5. Short delivery times due to in-house production. 6. Various types of weep holes are available to suit different applications. 7. One of the oldest companies among existing weep hole manufacturers. For details on the lineup, please see the individual product pages. ■ KMV Type: The most common weep hole (newly added diameter 30 in February 2022) ■ KMVH Type: Weep hole with socket ■ KMVS Type: Weep hole for sheets ■ KMVY Type: Weep hole for sheet piles ■ KMVA Type: Weep hole for underdrains ■ KMVC Type: Insert type weep hole ■ KMVK Type: Insert type weep hole with slope ■ KMVI Type: Driven weep hole ■ KMVM Type: Weep hole for troughs ■ KMVT Type: Weep hole for tunnels ■ KMVN Type: Weep hole with screw

Company：鬼頭忠兵衛商店
Price：Other

Drainage material
Agricultural civil engineering works
Watergate

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KM-type socket with weep hole 'KMVH type'

It is a check valve that can be fixed to the formwork by passing a separator through the weep hole. Other features are the same as the KMV type.

The "KMVH type" is a product that has a socket attached to the weep hole head (water channel side). As a result, the main body of the weep hole becomes an inner pipe during the installation of the formwork, allowing it to be fixed using separators and other tools. Additionally, the head component (water channel side, rubber valve component) and the eye plate are attached after the formwork is removed. 【Features】 ■ The length of the weep hole is manufactured according to the specified dimensions based on the thickness of the concrete (approximately 100 units can be shipped the same day with AM orders). ■ The structural device is simple, reducing the risk of failure. ■ The rubber valve is supported at the center, so there is no directional requirement during installation regarding which side should face up or the angle; it can be used for both the bottom and side wall. ■ The rubber valve is made of a special synthetic rubber, providing good heat resistance, cold resistance, and weather resistance. ■ The rubber valve can be replaced. Adhesive is applied to the screw holes during installation, eliminating the risk of the rubber valve detaching. *For more details, please refer to the PDF document or feel free to contact us.

Company：鬼頭忠兵衛商店
Price：Other

Piping materials (plastic pipes)
Flood prevention facilities, fire tanks, and flood control ponds

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KM Type Weep Hole for Antidrain "KMVA Model"

The available pipe diameters are φ50, 75, 100, 125, and 150mm! By tightening the screws firmly, the valve can be replaced.

The "KMVA type" is a backflow prevention valve used when installing underdrains to prevent floating in waterways, etc. It can be easily installed by adhesively attaching it to the riser pipe of the underdrain. Its simple structural design minimizes the risk of failure. Additionally, the weep hole rubber valve is supported at the center, allowing for no specific installation direction or angle requirements during construction. 【Features】 ■ Easy installation by adhesively attaching it to the riser pipe of the underdrain ■ No specific installation direction or angle requirements ■ Simple structural design minimizes the risk of failure ■ The rubber valve is made of special synthetic rubber, offering good heat resistance, cold resistance, and weather resistance ■ The valve can be replaced by tightening the screws firmly *For more details, please refer to the PDF document or feel free to contact us.

Company：鬼頭忠兵衛商店
Price：Other

Piping materials (plastic pipes)
Flood prevention facilities, fire tanks, and flood control ponds

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KM-style trough weep hole "KMVM type"

A weep hole used in reverse, which drains water from inside the structure to the outside, preventing outside groundwater from entering the structure!

The KM-type weep hole is a drainage pipe equipped with a backflow prevention valve. Traditionally, it has been used to drain excessive groundwater into drainage channels. The 'KMVM type' has reversed the installation direction of the valve compared to conventional designs, allowing water within the structure to drain outside while preventing external groundwater from entering the structure. This is a KM-type weep hole for troughs. 【Nominal Diameter Lineup】 ■φ40 ■φ50 ■φ75 ■φ100 *For more details, please refer to the PDF document or feel free to contact us.

Company：鬼頭忠兵衛商店
Price：Other

Piping materials (plastic pipes)
Flood prevention facilities, fire tanks, and flood control ponds

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Float valve type weep hole for side wall

Utilizing the action of a float, a flexible and sensitive operability without a fulcrum.

- Equipped with a check valve - Maintenanceable - No metal used - Internal structure of the valve body

Company：トーテツプラス
Price：Less than 10,000 yen

Water and sewerage pipe fittings

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Float valve type weep hole for base plate

Utilizing the action of a float, it sensitively responds to slight fluctuations in water level and reduces groundwater pressure.

- The structure is designed to minimize direct exposure of the valve body to ultraviolet rays, resulting in excellent durability. - The upper filter prevents the intrusion of sediment and protects the valve body. - Maintenance and valve body replacement are possible, and no metal is used.

Company：トーテツプラス
Price：Less than 10,000 yen

others

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Weep hole "Type G, GQF type"

Synthetic resin type! Check valve for groundwater and infiltrating water, etc.

The Weep Hole "Type G, GQF" can be used on both side walls and bottom plates. After the main body is installed, the valve can be added later, making installation easy. The length of the main body (using VP pipes) can be adjusted to match the wall thickness. The socket part of the main body has ribs, which enhances the bonding with concrete and improves water-stopping performance. The steel plate inside the rubber valve prevents warping of the valve body and maintains its water-stopping effect. 【Features】 ○ Usable for both side walls and bottom plates ○ High weather resistance and corrosion resistance ○ High pressure resistance ○ High water tightness For more details, please contact us or download the catalog.

Company：中部美化企業
Price：Other

Synthetic Resin Plywood

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Insert Weep Hole "GI Type"

Can be installed on existing drainage pipes! Check valve for existing drainage pipes.

The "GI type" is a weep hole that can be easily installed on existing drainage pipes. It prevents underground infiltration from groundwater and spring water. The valve structure is simple, ensuring no malfunctions, and the valve body is made of synthetic rubber, which has excellent heat resistance, cold resistance, and weather resistance. The steel plate inside the rubber valve prevents warping of the valve body and maintains the sealing effect. 【Features】 ○ Easy adhesive installation ○ High heat, cold, and corrosion resistance ○ High pressure resistance ○ High water tightness For more details, please contact us or download the catalog.

Company：中部美化企業
Price：Other

Sanitary fixtures

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Punch-in type weep holes "GH1 type / GH2 type"

Groundwater drainage! It can be installed retroactively in existing waterways or in waterways after installation.

The "GH1 type and GH2 type" driven weep holes are products that are primarily installed in existing waterways to address issues such as cracks caused by infiltrating water from the rear or concerns about uplift. Since the valve can be installed after the main construction is completed, there is no worry about damage to the valve body during installation. The steel plate inside the rubber valve prevents warping of the valve body and maintains its sealing effectiveness. 【Features】 ○ Can be installed after construction ○ No damage to the valve body during installation ○ Easy installation For more details, please contact us or download the catalog.

Company：中部美化企業
Price：Other

Concrete sheet piles and piles

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Sheet Weep Hole "GP1 Type"

Weep hole for waterproof sheets! A check valve to prevent underground infiltration from groundwater and spring water.

The "GP1 type" weep hole for sheets is a check valve that is installed on waterproof sheets. It consists of a stainless steel cover, a retaining ring, a rubber valve, and a screw-type body made of synthetic resin, making it robust and free from failures due to its simple structure. Its compact and lightweight design allows for direct and easy installation on the sheet. By using it in conjunction with drain pipes or air vent pipes, additional safety can be achieved. Furthermore, the weep hole for sheets ensures the safety of the embankment while significantly reducing construction effort and costs. 【Features】 - Simple structure with no failures - Can be installed on waterproof sheets up to 4mm thick - Slim design, with minimal visibility of irregularities after installation on pond waterproof sheets - Can be easily installed on waterproof sheets without the use of special tools - Made of synthetic resin and stainless steel, allowing for semi-permanent use For more details, please contact us or download the catalog.

Company：中部美化企業
Price：Other

Sanitary fixtures

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Weep Hole for Steel Sheet Piles "GS Type"

Easily attachable to steel sheet piles! A check valve that prevents underground infiltration from groundwater and spring water.

The "GS type" weep hole for steel sheet piles is a specialized backflow prevention valve designed to prevent disasters caused by the phenomenon of moisture increase in the rear area. The steel sheet pile method used for waterway revetments and other structures in soft ground areas has seen increased utilization in recent years. However, the weep holes or drain pipes used in this method are still not commonly employed, and the reduction of back pressure is not being addressed. By treating the water in the rear area, back pressure can be alleviated, leading to greater ground stability. 【Features】 - Easily attachable from the front of the steel sheet pile - Reduction of back pressure can be achieved through water treatment in the rear area For more details, please contact us or download the catalog.

Company：中部美化企業
Price：Other

Sanitary fixtures

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KM-type combined weep hole for bottom and side wall 'KMV type'

It can be used for both the bottom and side wall. It is easy to install because there is no need to align the orientation of the product during construction. The rubber valve, which is essential for water resistance, can be replaced.

The "KMV type" is the most common weep hole (backflow prevention valve) used to prevent cracks, uneven settlement, and uplift in structures due to uplift pressure and scouring effects from infiltrating water or seepage flow. Excessive groundwater pressure pushes the rubber valve up, releasing water into the drainage channel and preventing cracks and uplift in the structure. Additionally, when the water level in the drainage channel is high, the rubber valve closes due to the water pressure in the channel, preventing water leakage and scouring effects. There is a jig for attaching the weep hole to the formwork (for KMV-50 and KMV-75). 【Features】 ■ The length of the weep hole is manufactured according to the specified dimensions based on the thickness of the concrete (approximately 100 units can be shipped the same day with AM order). ■ The structural device is simple, reducing the risk of failure. ■ The rubber valve is supported at the center, so there is no construction directionality regarding which side should face up or the angle during installation. It can be used for both the bottom and side wall. ■ The rubber valve is made of a special synthetic rubber, providing good heat resistance, cold resistance, and weather resistance. ■ The rubber valve can be replaced. Adhesive is applied to the screw holes during installation, eliminating the risk of the rubber valve detaching. *For more details, please refer to the PDF document or feel free to contact us.

Company：鬼頭忠兵衛商店
Price：Other

Piping materials (plastic pipes)
Flood prevention facilities, fire tanks, and flood control ponds
Drainage and water removal

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KM-type sheet weep hole "KMVS model"

The characteristics of the KMV type have been inherited and improved to be attachable to waterproof sheets. It can be used with sheet thicknesses of up to about 10mm!

The "KMVS type" is a backflow prevention valve that has a plate (flange) attached to the center of the KM type weep hole. A sheet is placed on the lower plate and secured with the upper plate, allowing it to be attached to a waterproof sheet (vinyl-based or rubber-based) for use. It can be used with a sheet thickness of up to approximately 10mm, and a coconut fiber filter is built into the inside of the eye plate on the water inflow side. If protective soil or protective concrete is to be applied over the sheet, it can be manufactured to the specified length. Additionally, extensions can be made on either the pond side or the ground side of the plate. 【Features】 - The waterproof sheet is sandwiched between the plates of the weep hole, allowing for use with a sheet thickness of approximately 10mm. - The weep hole rubber valve is supported in the center, with no specific installation direction or angle required, making it usable for both the base and slope sections. *For more details, please refer to the PDF materials or feel free to contact us.

Company：鬼頭忠兵衛商店
Price：Other

Flood prevention facilities, fire tanks, and flood control ponds
Piping materials (plastic pipes)

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KM-type Weep Hole for Sheet Piles 'KMVY Type'

The KMV type retains its original features and has been improved to be attachable to steel sheet piles. It can be used with steel sheet pile thicknesses of up to approximately 28mm!

The "KMVY type" is a weep hole (backflow prevention valve) designed for installation in steel sheet piles. It can be installed on sheet piles up to 28mm thick, and if particularly long installation bolts are used, it can also be installed on thicker piles. The 50mm diameter version has a coconut fiber filter built into the main body, while the 75mm and 100mm versions have a non-woven fabric filter attached to the surface of the strainer. When pouring concrete on the waterway side of the sheet pile, it can be manufactured to the specified length according to the thickness of the concrete. 【Features】 ■ Can lower the water level behind the sheet pile to the level of the weep hole installation ■ Can be installed on sheet piles up to 28mm thick, and with particularly long installation bolts, it can also be installed on thicker piles ■ Installation work can be done from the front side of the sheet pile (excavation side) ■ The weep hole rubber valve is supported at the center, allowing for flexibility in installation direction and angle without specific construction orientation *For more details, please refer to the PDF document or feel free to contact us.

Company：鬼頭忠兵衛商店
Price：Other

Piping materials (plastic pipes)
Flood prevention facilities, fire tanks, and flood control ponds

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KM-type insertable weep hole "KMVC type / KMVK type"

Can be used when the drainage pipe is already installed within the concrete! Introducing the retrofitted type weep hole.

We would like to introduce the KM-type insertable weep hole (backflow prevention valve) 'KMVC type / KMVK type' handled by Kito Tadahei Co., Ltd. This product is a retrofit type weep hole used when the drainage pipes (VP pipes, VU pipes) are already installed within the concrete during repairs. For sloped walls, please use the "KMVK type (for slopes)." The slope type has a trimmed flange on the surface of the product. There are separate products for VP pipes and VU pipes. 【Product Lineup】 ■ KMVC type ■ KMVK type (for slopes) *For more details, please refer to the PDF document or feel free to contact us.

Company：鬼頭忠兵衛商店
Price：Less than 10,000 yen

Piping materials (plastic pipes)
Flood prevention facilities, fire tanks, and flood control ponds

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