Does the 90 degree elbow of the drain pipe under the toilet need to be made with an inspection openi

The position of the 90-degree elbow under the toilet does not need to add an inspection port, and the position of the inspection port of the general toilet is 1 meter from the ground of the main sewer pipe, and the up and down error does not exceed 20 mm.

The national water supply and drainage engineering acceptance code stipulates that "an inspection port should be set up every other layer on the drainage riser, but an inspection port must be set up on the lowest floor and the highest floor with sanitary appliances, the center height is 1 m from the operating ground, the allowable deviation is 20 mm, the orientation of the inspection port should be easy to maintain, and the inspection door should be installed on the inspection port on the concealed riser".

The latest GB50015-2003 Code for Design of Building Water Supply and Drainage (2009 Edition).

> Generally, the toilet is equipped with a water seal, and there is no need to set up a P-bend at the bottom, and there is no need to set up a P-bend with a cleaning port.

No need, the toilet comes with its own water storage!

The water trap is not needed, and there is a 90-degree elbow in the basement to have a access opening.

Summary. Hello, the 90-degree elbow position under the toilet does not need to add an inspection port, the location of the inspection mouth of the general toilet is mainly 1 meter from the sewer pipe to the ground, and the up and down error does not exceed 20 mm. The national water supply and drainage engineering acceptance code stipulates that "an inspection port should be set up every other layer on the drainage riser, but an inspection port must be set up at the lowest level and the highest layer with sanitary appliances, and its center height is 1m from the operating ground, and the allowable deviation is 20mm, and the orientation of the inspection port should be easy to overhaul, and the inspection door should be installed on the concealed riser."

Does the 90-degree elbow of the drain pipe under the toilet need to be made with an inspection opening?

Hello, the 90-degree elbow position under the toilet does not need to add an inspection port, the position of the inspection mouth of the general toilet is mainly 1 meter from the ground, and the up and down error does not exceed 20 mm. The national water supply and drainage engineering acceptance code stipulates that "an inspection port should be set up every other layer on the drainage riser, but an inspection port must be set up at the lowest level of leakage and the highest layer of sanitary appliances, the center height is 1m from the operating ground, and the allowable deviation is 20mm, the orientation of the inspection port should be easy to maintain, and the inspection door should be installed on the concealed riser."

Reasons for toilet pipe leakage: 1. Inferior material: some manufacturers blindly reduce production costs, and choose inferior materials to cause cracking at the water inlet valve outlet and the water inlet pipe itself during injection molding, resulting in sealing failure, and the water in the water tank flows into the toilet through the overflow pipe of the drainage valve, resulting in "long flowing water", second, the excessive pursuit of the miniaturization of the tank accessories, resulting in the float (or floating bucket) buoyancy is not enough to do enough, when the water submerges the float (or floating bucket), the water can not be closed, so that the water keeps flowing into the tank, Eventually, the balance flows from the overflow pipe into the toilet, causing water leakage.

This phenomenon is especially noticeable when the tap water pressure is high. 3. Improper design: the mechanism of the water tank accessories interferes during operation, resulting in water leakage.

For example, when the water tank is discharged, the float and the float rod will affect the normal reset of the flap and cause water leakage. In addition, the float rod is too long, and the float is too large, which causes friction between the water tank wall, affects the free lifting difference of the float, and leads to the failure of the seal and water leakage.