The secondary drain backfill will generally not be blocked depends on the technology, before the renovation will generally set the secondary drainage, so as to avoid water backflow, the problem of waterlogging, but if the blockage, the secondary drainage is also meaningless, interesting Ding life will bring you how to prevent the secondary drain blockage, I hope you will like.
A, the secondary drainage backfill will not be blocked
1. When many homeowners renovate their bathrooms, they set up secondary drains, which are more suitable for sink toilets, and if backfilled and properly constructed, they will not block the secondary drain. If the drain is clogged, there is no point in setting up a secondary drain. Once the drain cannot drain, it will cause water to back up, resulting in a waterlogging problem.
2. When carrying out secondary backfill, first of all, both sides of the sewer are built with red bricks to reinforce the drainage pipe to prevent displacement. Because once shifted, the joints will easily loosen, thus causing water seepage problems.
3. Next, the drainage pipe needs to be backfilled with cement mortar. Also, before backfilling, two layers of waterproof material should be brushed on the bottom of the pipe. For the later stages of backfill, vitrified backfill is usually used because it has the effect of absorbing water and is relatively light in weight, which does not increase the load and will of course cost slightly more.
4. Through this series of steps, you can ensure that the purpose of secondary drainage is achieved and the drainage outlet will not be blocked.
Second, how to prevent clogging of the secondary drain
1. All drains should use check valves to prevent the drain from overflowing after the pipe returns to the water, and the floor drain is also an anti-backflow floor drain to ensure secondary drainage and more waterproof treatment of the sedimentation tank.
2. Use check valves for toilets and check valves for all washbasins and sinks to effectively prevent secondary drainage holes from backflowing.
3. The connection between the drainage vertical pipe and the drainage horizontal trunk pipe, it is appropriate to use two 45 ° or bend radius of not less than 4 times the diameter of the pipe 90 ° elbow to turn. Drainage pipes should be connected as little as possible in a straight line. The diameter and slope of the drainage pipe should be appropriately increased.
Third, the secondary drain in the bathroom will not backwater?
Returning water is still possible, but the chances are small. In fact, if the efficiency of the primary drainage is relatively high, coupled with good waterproofing, you can do without the secondary drainage, after all, the secondary drainage in the ground to increase a mouth connected to the pipe, once the water is very troublesome. There is also the floor drain selection is very important, must choose the floor drain of super fast water, to avoid the surface water diffusion overflow, so that you can do without the secondary drainage.
