1. The advantages of environmentally friendly plastic

inspection wells are five points: land saving, energy 

saving, water saving, material saving, and environmental

protection.

(1) Acid and alkali corrosion resistance, aging resistance,

and long service life.

(2) Safe and environmentally friendly, good sealing and 

leakage prevention. The material of the plastic inspection 

well is high-density polyethylene plastic, which is non-toxic

and odorless and can be recycled after use; good sealing

can prevent rainwater and sewage from leaking and leaking to

prevent groundwater pollution. It is a chemical environmentally 

friendly building material and complies with the national environmental

protection policy.

(3) Uniform settlement and pressure resistance. The pipe and the

well seat are flexibly connected, and the clay of the pipe and the

well seats move together, which solves the uneven settlement

a problem caused by the connection between the traditional inspection 

well and the plastic pipe, and effectively prevents ground collapse.

(4) Convenient and fast construction. The split assembly structure is

adopted, and the well shaft can be cut and adjusted on-site to meet

various installation depth requirements, effectively reducing

costs, greatly improving construction progress, and shortening 

the construction period by more than 10-20 times that of 

traditional inspection wells; and it can be constructed all

day long, which is incomparable to brick inspection wells and

other cement brick wells.

(5) Efficient drainage. The inner wall is smooth and has a diversion

groove, which makes it difficult for dirt to accumulate,

reducing the possibility of blockage. It has excellent 

drainage performance, and the rainwater and sewage discharge

rate is 1 to 3 times that of traditional inspection wells.

(6) Lightweight, easy to transport and install, reliable 

performance, strong bearing capacity; strong adaptability and

complete varieties, the shaft height can be adjusted at will,

holes can be drilled on the shaft, and the direction can be

adjusted to meet all the needs of engineering installation.

(7) The overall cost is low, the maintenance cost is low, which

is more advantageous than traditional inspection wells; it can

be recycled and reused, and have huge social benefits.

(8) Good sealing performance and anti-leakage. Because of the 

flexible connection method: flexible and convenient, it can 

overcome the harsh construction environment of wind, dust, sand

and ash. It can also overcome the difficulty of repeated 

insertion due to the increase in road surface height.

(9) Save materials. Plastic inspection wells use polymer resin

as the processing material to replace red brick cement, saving 

topsoil resources; the specifications used in building communities

are reduced, which greatly saves the land space occupied by

buried inspection wells.

2. Production method:

Wenyuan plastic inspection wells are all made of a one-time injection

molding and reinforcement molding technology. The surface of the

well body shows a P pattern, and the inner wall is smooth and without 

shearing, showing the guide flow groove of the well seat. A clear 

guide groove is set in the good seat to effectively prevent water 

flow from rushing and avoid head loss, thereby greatly reducing dirt

retention and facilitating cleaning and maintenance. 

The wall thickness can reach 7 mm, and the overall strength

of the good seats is greatly increased, which is currently

unattainable by other inspection well manufacturers. 

The interface R arc design is convenient for the installation 

of the well shaft and pipeline, and the sealing rubber ring 

is not easy to fall off. If there is no R arc, the sealing 

rubber ring is easy to slip out of the interface. 

The bottom of the Wenyuan plastic inspection well seat is specially 

designed with mesh reinforcement ribs and 360° annular surface support,

which doubles the guarantee and makes the well body more stable, 

comprehensively improving the safety of the entire system.

3. Technical level of plastic inspection wells:

The plastic inspection well consists of a well seat, a well shaft, a well 

cover and plastic inspection well parts. The inspection well shaft can be

made of buried drainage pipes, such as PVC-U double-layer axial hollow

pipes, HDPE hollow winding pipes, etc.

According to the number of pipes and angles, there are starting well seats,

straight well seats, three-way well seats, four-way well seats, 90-degree

elbow well seats, etc. In order to adapt to various drainage conditions,

plastic inspection wells are also equipped with matching plastic 

inspection of well parts such as inner and outer diameter conversion joints,

saddle joints, reducers, confluence joints, and angle joints. 

These parts and well seats are used together to ensure the flow and 

sealing of the entire drainage system.

The inspection well cover can be made of cast iron inspection well 

cover, composite material inspection well cover, and steel fiber 

concrete inspection well cover. The quality meets the requirements 

of the current "Plastic Inspection Well for Drainage in Building 

Residential Areas" CJ/T233-2006. The color is white or gray, and 

the inner and outer walls of the well shaft should be smooth and 

flat. There should be no bubbles, cracks, depressions, uneven 

color, and decomposition discoloration lines on the surface. 

The plastic well shaft seat has no cracks or cracks under 

a static load pressure of 15KN.