Grout Construction Injection Tube

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US $1-10 / Meters | 1000 Meter/Meters (Min. Order)
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Place of Origin:
Beijing, China (Mainland)
Brand Name:
Model Number:
Other Waterproofing Materials


 LW Re-inject Is one of the specially designed solid PVC injection pipe systems. It can be mounted on the internal cement joint, used to waterproof and seal any gaps and holes on the joint area.



 1.Can pass leaking test

 Can confirm the sealing property of the construction joint at scene

Grout only when the joint leaking

 2.Hose can be unlimited re-injected

 If there are still crack or new cracks, hose can be grouted again, effectively reduce the complicated process of changing tools

 3.Rigid core  Won't be pressed flat under concrete pressure so as to make the use of the grouting unobstructed

 4. Resistance to chemical corrosion

 Won't be corroded when contacting polyurethane, ethylene resin, epoxy resin or cement, the material is durable, Do not contain metal


Expediently placed in the corner, no need to cut and connect.



 Subway, tunnel, Water and sewage treatment plants, Swimming pool and water amusement park, Nuclear power station, The dam, lock, canals, reservoir and ditch, Primary and secondary cofferdam facilities, Bridge,   Commercial and industrial buildings, garage, stadium, Aquarium, tank and similar structure .


Work and design principle:

The first stage: water cement

Design principle(Re-inject)



Plastic injection hose For sealing construction joints

After putting cement around LW repeatable injection pipe, the external pressure will make the chloroprene rubber belt fixed, and seal the grouting mouth and grouting channel.

Plastic injection hose For sealing construction joints

Grouting pipe



Theinjection pipe solid lining is made from high quality of PVC. The inner can absorb cement pressure, ensure the grouting pipe work together.



Lateral staggered shedding ensure uniform release of the grouting material.


The second stage: grouting

Plastic injection hose For sealing construction joints



The compressible chloroprene rubber belt in the longitudinal grooves is a unique and very important part. They play the valve's role when grouting and seal when cleaning.




Internal grouting pressure will form pressure for the neoprene rubber belt, and inject the grouting material from eight longitudinal gap. This makes the grouting materials release from the whole injection pipe can maintain uniform.



The third stage: clean the injection pipe

Plastic injection hose For sealing construction joints


LW repeatable grouting system is the leading waterproofing system, and ensure that the joint 100% of water tightness. Its unique "valve" design makes LW become the only injection pipe system that can prevent fall leakage, repetitive grouting.



When using the grouting material which has got approval, LW repeatable injection pipe can be easily washed clean by water with vacuum pressure. Negative pressure can make chloroprene rubber belt reset, and prevent the injected material being absorbed into the grouting pipe during cleaning.



A series of characteristics and advantage


Repeatable grouting


Customer recognition



Wash by water or vacuum pressure,prepare for future use.

LW has been successfully used in the United States and the world and won the international recognition for 15 years.


Many grouting materials


Maintenance save worry


The fourth stage: prepare for the future grouting


LW system is suitable for a wide range of grouting materials.


The ability of repeatable grouting ensure that the building joints keep waterproof state in its life period.



Can grout again at any time if need.

Plastic injection hose For sealing construction joints


Testing capability


Easy installation


LW system can be used to test water tightness for the already or not grouting joints. Just water LW repeatable injection pipe is ok.

LW is installed before the second grouting, and no need segmentation template.



Installation method:


LW repeatable injection pipe installation length can reach up to 10 meters, which include the fiber reinforced PVC end. If you need longer, please contact Beijing Lang Wei times science and technology co.,ltd.;

In central parts, every 20 -- 25 cm, use special plastic clip or pipe clamp (see figure 1 and figure 2) to fix LW repeatable injection pipe on flat and smooth cement plane;

Plastic injection hose For sealing construction joints

Cover at least 2cm cement overlay;


Not to install in ways of bend or limitation, and should not be connected in reinforcing bars as building support



Distance between two parallel injection pipes is at least 5 cm

Connect grouting pump at the end of the PVC emissions tube For future grouting, The fiber reinforced PVC pipe ends should be exposed to convenient, accessible place. Use terminal box, shoot to nail gun or directly extend fiber reinforced pipe to the cement external (see chart 3);


Plastic injection hose For sealing construction joints

In many practical applications, it requires the injection pipe cross each other. The intersection parts must maintain close contact with concrete; Discharge outlet part can overlap (see chart 1);

Extend the fiber reinforced discharge outlet about 10cm into the box when junction box used.

Plastic injection hose For sealing construction joints



  Two models are alternative: 


Internal diameter

External diameter

Out hole

Gap between holes














 LW 1 Used for all standard building joint;

 LW 2 If need more long injection pipe according to design reasons or if the upcoming cement mortar (Portland cement and mortar mixture) grouting, namely, as to design and application problems, please call Beijing Lang Wei times science and technology co., led.


Stored in a cover of place, avoid oil, dirt, concrete rubble, etc. getting into the hose.

 Quality guarantee period:Permanent preservation according to the recommended way, in the seal, original conditions.


Plastic injection hose For sealing construction joints

Plastic injection hose For sealing construction joints



Plastic injection hose For sealing construction joints 


Plastic injection hose For sealing construction joints